A highly efficient heat transfer active cooling method for sharp leading edge inlets

Abstract

The present invention provides an efficient heat transfer active cooling method for a sharp leading edge air inlet, which relates to the field of high-speed air inlet design, including: (1) burying a cooling medium channel in the sharp leading edge air inlet, including a cooling medium inlet, an inflow confluence groove, an inflow channel, a sharp leading edge cooling channel, an outflow channel, an outflow confluence groove, a flow diversion channel and a cooling medium outlet; (2) the cooling medium flows from the inflow channel to the outflow channel, absorbs the heat of the inlet wall and discharges it to the outside of the inlet through the cooling medium outlet; (3) the cooling medium flows from the sharp leading edge cooling channel to the outflow channel, absorbs the heat of the high heat flow area at the leading edge of the inlet and discharges it to the outside of the inlet through the cooling medium outlet. The present invention buries the cooling medium channel in the inlet wall, solves the installation problem of the cooling mechanism, enables the heat of the inner wall of the inlet to be quickly transferred, reduces the structural weight of the inlet, and reduces the aerodynamic resistance of the inlet.

Description

Technical Field

[0001] The invention belongs to the field of high-speed air inlet design, and in particular relates to a high-efficiency heat transfer active cooling method for a sharp leading edge air inlet.

[0002] Efficient heat transfer means that the heat flux on the inlet wall of the tip leading edge inlet drops by 20% within 5s of working time. Background Art

[0003] With the continuous development of aerospace technology, high-speed flight technology has become a hot field of competitive research. High-speed aircraft fly at high Mach numbers in the atmosphere, and aerodynamic heating is very serious during flight, and the higher the Mach number, the more serious the aerodynamic heating. As one of the key technologies for the development of air-breathing high-speed aircraft, the air inlet needs to withstand the high temperature and high pressure caused by aerodynamic loads, aerodynamic heat loads and fuel combustion in the combustion chamber, and meet two main functional requirements at the same time. One is to withstand the heat flow and aerodynamic force without damage during the entire flight, and the other is to maintain its original shape without major deformation. The quality of its performance often has an important impact on the entire propulsion system and even the performance of the aircraft; due to the particularity of the leading edge structure and position of the air inlet, thermal protection cannot use conventional cladding thermal protection materials. Conventional designs generally use heat sinks and thermal structures for thermal protection. Based on the above considerations, the existing high-speed air inlets are mostly passive thermal protection structures, characterized by blunt leading edges and large wall thicknesses, and the materials are made of high-temperature resistant metals or ceramic-based composite materials. The main disadvantages of high-temperature metal inlets are heavy weight, poor inlet performance due to large leading edge bluntness, and may cause thrust-drag imbalance of the aircraft, and structural weight exceeding the design index. The main disadvantages of ceramic-based composite inlets are difficulty in forming complex curved surfaces, low yield, high cost, easy stress concentration at the opening, and low reliability of the mechanical interface.

[0004] In order to improve the performance of the inlet duct, reduce the weight of the inlet duct structure, and reduce the aerodynamic resistance of the inlet duct, the ideal inlet duct structure is generally designed as a thin-walled structure with a sharp leading edge. In addition to increasing the allowable temperature limit of the material, appropriate active cooling solutions can be considered to achieve high-performance inlet duct structure design. Summary of the invention

[0005] In order to solve the above problems, the present invention aims to provide a high-efficiency heat transfer active cooling structure of a pointed leading edge air inlet duct, in which active cooling channels are buried in the walls of the pointed leading edge, compression surface, and bottom flange of the air inlet duct. The cooling medium efficiently exchanges heat with the high-temperature area through the cooling channel, and significantly reduces the wall temperature of the air inlet duct when the air inlet duct is working, thereby achieving a sharp leading edge and a lightweight structure. The air inlet duct with a pointed leading edge and a thin-wall structure can effectively improve the air inlet performance, reduce the weight of the air inlet structure, and reduce the aerodynamic resistance of the air inlet duct.

[0006] To achieve the above object, the present invention has the following technical solutions:

[0007] A high-efficiency heat transfer active cooling method for a sharp leading edge air inlet comprises the following steps:

[0008] S1. A cooling medium channel is buried in the wall of the sharp leading edge air inlet duct, wherein the cooling medium channel includes a cooling medium inlet 1, an inflow confluence groove 2, an inflow channel 3, a sharp leading edge cooling channel 4, an outflow channel 5, an outflow confluence groove 6, a diversion channel 7 and a cooling medium outlet 8;

[0009] S2, the cooling medium enters from the cooling medium inlet 1 and flows into the confluence groove 2, flows through the inflow channel 3 and the sharp leading edge cooling channel 4 to the outflow channel 5, absorbs the heat of the inlet duct wall and is discharged to the outside of the inlet duct through the cooling medium outlet 8;

[0010] S3, the cooling medium enters the sharp leading edge cooling channel 4 from the outlet of the inlet channel 3, flows through the sharp leading edge cooling channel 4 to the outflow channel 5, absorbs the heat of the high heat flow area at the leading edge of the inlet duct, and discharges it to the outside of the inlet duct through the cooling medium outlet 8;

[0011] Among them, high heat flux refers to the heat flux with a circumferential temperature exceeding 1000K at the leading edge of the inlet tip.

[0012] Furthermore, the step S1 of embedding a cooling medium channel in the wall surface of the sharp leading edge air inlet duct includes:

[0013] S101, define the horizontal direction from left to right as the free flow direction, and place the sharp leading edge air inlet along the free flow direction with the inner surface of the outer compression section 9 of the sharp leading edge air inlet facing upward;

[0014] The pointed leading edge air inlet includes, from left to right, an outer compression section 9, an inner compression section 10 connected with the inlet and the end of the outer compression section 9, and a bottom flange 11 connected with the inlet end face and the outlet of the inner compression section 10;

[0015] S102, project the outer surface and inner surface of the compression section of the sharp leading edge inlet duct onto the outlet surface of the bottom flange 11 to obtain elliptical C and ellipse C 1, the outlet surface facing the bottom flange 11, with the ellipse C The center is the coordinate origin O , along the ellipse C The long axis direction from left to right is X The positive direction of the axis, along the ellipse C The minor axis direction from bottom to top is Y The positive direction of the axis establishes a plane rectangular coordinate system XOY , the pointed leading edge inlet compression section is the sum of the outer compression section 9 and the inner compression section 10;

[0016] by XThe positive direction of the axis is the starting edge, and it rotates counterclockwise to the jth ray ol j Angle α j For the j The azimuth of the first ray is calculated by formula (1) j The azimuth of the ray, that is:

[0017] (1)

[0018] in, a is the ellipse C The length of the major semi-axis, b is the ellipse C The length of the minor semiaxis, j It is j The ray number, j =1~4 and j is an integer, π =180°;

[0019] With coordinate origin O As the endpoint, α j is the azimuth to the ellipse C Draw 4 rays around the circumference of HE / HER 1~ HE / HER 4. The 4 rays divide the ellipse C Divided into 4 elliptical sectors of equal area along the circumference; HE / HER 1、 HE / HER 4. Ellipse C ,oval C 1 is surrounded by a rectangular coordinate system located in the plane XOY The area between the first quadrant and the fourth quadrant is the front wall 1001, and the ray HE / HER 2、 HE / HER 3. Ellipse C ,oval C 1 is surrounded by a rectangular coordinate system located in the plane XOY The area between the second quadrant and the third quadrant is the back wall 1002. HE / HER 1、 HE / HER 2. Ellipse C ,oval C 1 is surrounded by a rectangular coordinate system located in the plane XOY The area between the first quadrant and the second quadrant is the upper wall 1003, ray HE / HER 3、 HE / HER 4. Ellipse C ,oval C1 is surrounded by a rectangular coordinate system located in the plane XOY The area between the third quadrant and the fourth quadrant is the lower wall 1004;

[0020] S103, burying the inflow channel 3 inside the front wall surface 1001 and the rear wall surface 1002 described in step S102;

[0021] S104, burying the outflow channel 5 inside the upper wall surface 1003 and the lower wall surface 1004 described in step S102;

[0022] S105, burying a sharp front edge cooling channel 4 along the circumferential direction inside the sharp front edge of the outer compression section 9 in step S101;

[0023] S106, burying the inflow confluence groove 2 in the bottom flange 11 along the circumference of the bottom flange 11;

[0024] S107, burying the outflow confluence groove 6 in the bottom flange 11 along the circumference of the bottom flange 11;

[0025] S108, opening a cooling medium inlet 1 on the outlet surface of the bottom flange 11;

[0026] S109, opening a cooling medium outlet 8 on the outlet surface of the bottom flange 11;

[0027] S110, opening a diversion channel 7 in the bottom flange 11;

[0028] S111, connecting the cooling medium inlet 1, the inflow confluence groove 2, the inflow channel 3, the sharp leading edge cooling channel 4, the outflow channel 5, the outflow confluence groove 6, the diversion channel 7 and the cooling medium outlet 8 together to form a cooling medium channel.

[0029] Further, S103, an inflow channel 3 is buried inside the front wall surface 1001 and the rear wall surface 1002 described in step S102, specifically:

[0030] S10301, the inflow channel 3 is a plurality of channels with rectangular cross sections extending inside the front wall 1001 and the rear wall 1002 in step S102 along the free flow direction in step S101, and the cross section refers to a cross section perpendicular to the flow direction of the cooling medium flowing in the inflow channel 3;

[0031] S10302, the projection of the center line of the inflow channel 3 on the outlet surface of the bottom flange 11 is located at the ellipse C 2, the ellipse C The center of 2 coincides with the coordinate origin O in step S102, and the ellipse C The shape of 2 is determined by formula (2):

[0032] (2)

[0033] in, a 2 is the ellipse C 2 is the length of the semi-major axis, b 2 is the ellipse C 2's minor semi-axis length, a 21 is the ellipse described in step S102 C 1 is the length of the semi-major axis, b 21 is the ellipse described in step S102 C 1 is the length of the minor semi-axis, a 22 is the ellipse described in step S102 C The length of the major semi-axis, b 22 is the ellipse described in step S102 C The length of the minor semi-axis;

[0034] S10303, inside the front wall 1001 and the rear wall 1002 described in step S102, from the inlet surface of the bottom flange 11 to the sharp front edge of the external compression section 9 described in step S101, along the elliptical C 2 is arranged at equal intervals on the circumference, the end close to the inlet surface of the bottom flange 11 is the inlet of the inlet channel 3, and the end close to the sharp front edge is the outlet of the inlet channel 3.

[0035] Further, S104 burying the outflow channel 5 inside the upper wall surface 1003 and the lower wall surface 1004 described in step S102, specifically:

[0036] S10401, the outflow channel 5 is a plurality of channels with rectangular cross sections extending inside the upper wall 1003 and the lower wall 1004 in step S102 along the free flow direction in step S101, and the cross section refers to a cross section perpendicular to the flow direction of the cooling medium flowing in the outflow channel 5;

[0037] S10402, the projection of the center line of the outflow channel 5 on the outlet surface of the bottom flange 11 is located at the ellipse C 3 on the circumference, ellipse C The center of 3 coincides with the coordinate origin O in step S102, and the ellipse C The shape of 3 is determined by formula (3):

[0038] (3)

[0039] in, a 2 is the ellipse described in step S10302 C2 is the length of the semi-major axis, b 2 is the ellipse described in step S10302 C 2's minor semi-axis length, a 3 is the ellipse C 3 is the length of the semi-major axis, b 3 is the ellipse C 3's semi-minor axis length, d The ellipse C The length of the minor axis of 2 and the ellipse C 3, the difference in the length of the minor semi-axis is the ellipse C The length of the major axis of 2 and the ellipse C 3.

[0040] S10403, inside the upper wall 1003 and the lower wall 1004 described in step S102, from the inlet surface of the bottom flange 11 to the sharp front edge of the external compression section 9 described in step S101, along the elliptical C The outflow channels 5 are arranged at equal intervals on the circumference of 3, the end close to the inlet surface of the bottom flange 11 is the outlet of the outflow channel 5, and the end close to the sharp front edge is the inlet of the outflow channel 5.

[0041] Further, in step S105, a sharp front edge cooling channel 4 is buried in the sharp front edge of the outer compression section 9 in the circumferential direction, specifically:

[0042] S10501, facing the outlet surface of the bottom flange 11, on the outer compression section 9, located in the plane rectangular coordinate system described in step S102 XOY The first sharp front edge cooling channel 41 is buried along the circumferential direction of the sharp front edge in the sharp front edge area corresponding to the third quadrant and the fourth quadrant. The end face of the first sharp front edge cooling channel is sealed and located in the third quadrant. The first end of the first sharp front edge cooling channel 41 cannot reach X The negative half axis position of the shaft, the end face of the tail end of the first sharp leading edge cooling channel is sealed and located in the fourth quadrant, and the tail end of the first sharp leading edge cooling channel 41 cannot reach X The positive half axis position of the axis;

[0043] The plane rectangular coordinate system described in step S102 is located on the outer compression section 9 XOY The first quadrant and the second quadrant corresponding to the sharp leading edge are provided with a second sharp leading edge cooling channel 42 buried along the circumferential direction of the sharp leading edge. The end surface of the first end of the second sharp leading edge cooling channel is sealed and located in the first quadrant. The first end of the second sharp leading edge cooling channel 42 cannot reach X The end face of the tail end of the second sharp front edge cooling channel 42 is sealed and located in the second quadrant. The tail end of the second sharp front edge cooling channel 42 cannot reach X Negative half axis position of the axis;

[0044] The first sharp leading edge cooling channel 41 and the second sharp leading edge cooling channel 42 constitute the sharp leading edge cooling channel 4;

[0045] S10502, intersecting the center line of the inflow channel 3 described in step S10302 and the center line of the outflow channel 5 described in step S10402 with the right side surface of the sharp front edge cooling channel 4 to obtain a series of intersections, starting from the head end of the first sharp front edge cooling channel 41 to the tail end of the second sharp front edge cooling channel 42, and opening an inflow channel 3 outlet docking hole directly opposite to the inflow channel 3 outlet and an outflow channel 5 inlet docking hole directly opposite to the outflow channel 5 inlet on the right side surface with the intersections as the center, respectively, wherein the shape of the inflow channel 3 outlet docking hole is the same as the shape of the inflow channel 3 cross section, and the shape of the outflow channel 5 inlet docking hole is the same as the shape of the outflow channel 5 cross section;

[0046] The cross section of the inflow channel 3 refers to the cross section perpendicular to the flow direction of the cooling medium in the inflow channel 3, the cross section of the outflow channel 5 refers to the cross section perpendicular to the flow direction of the cooling medium in the outflow channel 5, and the right side surface refers to the surface on the tip leading edge cooling channel 4 that is opposite to the outlet of the inflow channel 3 and the inlet of the outflow channel 5.

[0047] Further, S106 bury the inflow confluence groove 2 in the bottom flange 11 along the circumference of the bottom flange 11, specifically:

[0048] S10601, draw the ellipse described in step S10302 in a plane whose distance from the inlet surface of the bottom flange 11 is half the thickness of the bottom flange and which is parallel to the inlet surface of the bottom flange 11 C 2. A flow confluence groove 2 with a right-angled trapezoidal cross section is provided along the circumference of the bottom flange 11. The upper bottom of the right-angled trapezoid is designed to be an arc shape. The acute angle of the trapezoid is ≤45°. Facing the outlet surface of the bottom flange 11, the flow confluence groove 2 is formed in the shape of an ellipse. C 2 extends clockwise from the center line, flows into the end face seal of the head end of the confluence groove 2, and is located in the rectangular coordinate system described in step S102 XOY In the third quadrant, the end face of the inflow confluence trough 2 is X The angle of the negative half axis is 3-8°, and the end face of the tail end of the confluence groove 2 is sealed and located in the rectangular coordinate system described in step S102 XOY In the fourth quadrant, the end face of the confluence groove 2 at the end of the confluence groove 2 is X The angle of the positive semi-axis is 6-10°;

[0049] S10602, extending the center line of the inflow channel 3 toward the left side surface of the inflow confluence groove 2 to obtain a series of intersections, and opening inlet docking holes of the inflow channel 3 in sequence on the left side surface of the inflow confluence groove 2 from the head end to the tail end of the inflow confluence groove 2 with these intersections as the center, and the shape and size of the inlet docking holes of the inflow channel are the same as the shape and size of the cross section of the inflow channel 3;

[0050] The left side surface is the surface of the inlet surface of the flow-in confluence trough 2 close to the bottom flange 11;

[0051] S10603, according to step S10302, the ellipse C 2 and the circumference of step S102 X The intersection of the negative half axis of the axis is taken as the starting point, a vertical line perpendicular to the outlet surface of the bottom flange 11 is drawn, and a cooling medium inlet and output end docking hole with the same cross-sectional shape and size as the output end of the cooling medium inlet 1 is opened on the right side surface of the inflow confluence groove 2 with the vertical line as the center line. The right side surface refers to the surface of the inflow confluence groove 2 close to the outlet surface of the bottom flange 11;

[0052] S10604, on the inner surface of the inflow confluence trough 2, facing the coordinate origin described in step S102 O On the surface, in the rectangular coordinate system described in step S102 XOY The fourth quadrant and X The straight line with an angle of 6° between the positive semi-axis and the ellipse described in step S10302 C 2 is taken as the center, a diversion channel entrance docking hole with the same shape and size as the entrance cross-section of the diversion channel 7 is opened, and the center line of the docking hole is aligned with the ellipse described in step S10302. C 2's circumferences intersect perpendicularly;

[0053] The cross section refers to a cross section perpendicular to the flow direction of the coolant in the inflow collecting channel 2 .

[0054] Further, S107 bury the outflow confluence groove 6 in the bottom flange 11 along the circumference of the bottom flange 11, specifically:

[0055] S10701, draw the ellipse described in step S10402 in a plane whose distance from the inlet surface of the bottom flange 11 is half the thickness of the bottom flange and which is parallel to the inlet surface of the bottom flange 11 C 3. An outflow confluence groove 6 with a right-angled trapezoidal cross section is provided along the circumference of the bottom flange 11. The upper bottom of the right-angled trapezoid is designed to be an arc shape. The acute angle of the trapezoid is ≤45°. Facing the outlet surface of the bottom flange 11, the outflow confluence groove 6 is elliptical. C 3 extends clockwise from the center line, and the end surface of the first end of the outflow confluence groove 6 is sealed and located in the rectangular coordinate system described in step S102 XOY In the second quadrant, the end surface of the outflow confluence groove 6 is X The angle of the negative half axis is 15-20°, and the end face of the outflow confluence groove 6 is sealed and located in the rectangular coordinate system described in step S102 XOY In the third quadrant, the end surface of the outflow confluence groove 6 is X The angle of the negative half axis is 8-10°;

[0056] S10702, extending the center line of the outflow channel 5 toward the left side surface of the outflow confluence groove 6 to obtain a series of intersections, and opening outflow channel outlet docking holes in sequence from the head end to the tail end of the outflow confluence groove 6 on the left side surface of the outflow confluence groove 6 with these intersections as the center, and the shape and size of the outflow channel outlet docking holes are the same as the shape and size of the cross section of the outflow channel 5;

[0057] The left side surface is the surface of the outflow confluence groove 6 close to the inlet surface of the bottom flange 11;

[0058] S10703, according to step S10402, the ellipse C The circumference of 3 is the same as that of step S102 X The intersection of the positive half axis of the axis is taken as the starting point, and a vertical line perpendicular to the outlet surface of the bottom flange 11 is drawn. With the vertical line as the center line, a cooling medium outlet input end docking hole with the same cross-sectional shape and size as the output end of the cooling medium outlet 8 is opened on the right side surface of the outflow confluence groove 6. The right side surface refers to the surface of the outflow confluence groove 6 close to the outlet surface of the bottom flange 11;

[0059] S10704, on the inner surface of the outflow confluence groove 6, facing the coordinate origin described in step S102 O On the surface, in the rectangular coordinate system described in step S102 XOY The fourth quadrant and X The straight line with an angle of 6° between the positive semi-axis and the ellipse described in step S10402 C 3 is taken as the center, and a diversion channel outlet docking hole having the same shape and size as the outlet cross-section of the diversion channel 7 is provided;

[0060] The cross section refers to a cross section perpendicular to the flow direction of the coolant in the outflow collecting groove 6 .

[0061] Further, S108 opens a cooling medium inlet 1 on the outlet surface of the bottom flange 11, specifically:

[0062] On the outlet surface of the bottom flange 11, at the negative half axis position of the X axis in step S102, a cooling medium inlet 1 is provided, the cross-sectional shape of the cooling medium inlet 1 is circular, the end of the cooling medium inlet 1 close to the outlet surface of the bottom flange 11 is the input end of the cooling medium inlet 1, the end of the cooling medium inlet 1 close to the flow confluence groove 2 is the output end of the cooling medium inlet, and the center line of the cooling medium inlet 1 is aligned with the ellipse in step S10301. C 2's circumferences intersect perpendicularly;

[0063] The cross section refers to a cross section perpendicular to the flow direction of the coolant in the coolant inlet 1 .

[0064] Further, S109 opens a cooling medium outlet 8 on the outlet surface of the bottom flange 11, specifically:

[0065] On the outlet surface of the bottom flange 11, at the positive half axis position of the X axis described in step S102, a cooling medium outlet 8 is provided, the cross-sectional shape of the cooling medium outlet 8 is circular, the end of the cooling medium outlet 8 close to the outlet surface of the bottom flange 11 is the output end of the cooling medium outlet 8, the end of the cooling medium outlet 8 close to the outflow confluence groove 6 is the input end of the cooling medium outlet 8, and the center line of the cooling medium outlet 8 is aligned with the ellipse described in step S10401 C The circumferences of 3 intersect vertically;

[0066] The cross section refers to a cross section perpendicular to the flow direction of the coolant in the coolant outlet 8 .

[0067] Furthermore, S110 opens a flow diversion channel 7 in the bottom flange 11, specifically:

[0068] S11001, connecting the center of the outlet docking hole of the flow diversion channel on the inflow confluence trough 2 and the center of the inlet docking hole of the flow diversion channel on the outflow confluence trough 6 to obtain the center line of the flow diversion channel;

[0069] S11002. With the center line of the diverter channel as the center, a diverter channel 7 is opened between the inflow confluence groove 2 and the outflow confluence groove 6 in the bottom flange 11. The side of the diverter channel 7 close to the inflow confluence groove 2 is the outlet of the diverter channel, and the side of the diverter channel 7 close to the outflow confluence groove 6 is the inlet of the diverter channel. The shape of the cross section of the diverter channel 7 is the same as the cross section of the inflow confluence groove 2 and the outflow confluence groove 6. The size of the cross section of the diverter channel 7 is the same as the size of the diverter channel inlet docking hole on the inflow confluence groove 2 and the diverter channel outlet docking hole on the outflow confluence groove 6.

[0070] The cross section refers to a cross section perpendicular to the flow direction of the coolant in the branch channel 7 .

[0071] Further, S111 connects the cooling medium inlet 1, the inflow confluence groove 2, the inflow channel 3, the sharp leading edge cooling channel 4, the outflow channel 5, the outflow confluence groove 6, the diversion channel 7 and the cooling medium outlet 8 together to form a cooling medium channel, specifically:

[0072] S11101, the input end of the cooling medium inlet 1 is connected to the cooling medium input pipeline, and the output end of the cooling medium inlet 1 is connected to the inflow confluence groove 2 through the cooling medium inlet output end docking hole on the inflow confluence groove 2;

[0073] S11102, the inlet of the inflow channel 3 is connected to the inflow confluence groove 2 through the inflow channel inlet docking hole on the inflow confluence groove 2 corresponding to the inflow channel 3 inlet, and the outlet of the inflow channel 3 is connected to the sharp front edge cooling channel 4 through the inflow channel outlet docking hole on the sharp front edge cooling channel 4 corresponding to the outlet of the inflow channel 3;

[0074] S11103, the sharp leading edge cooling channel 4 is connected with the outflow channel 5 through the outflow channel inlet docking hole on the sharp leading edge cooling channel 4 corresponding to the inlet of the outflow channel 5;

[0075] S11104, the outlet of the outflow channel 5 is connected to the outflow confluence groove 6 through the outflow channel outlet docking hole on the outflow confluence groove 6 corresponding to the outlet of the outflow channel 5;

[0076] S11105, the input end of the cooling medium outlet 8 is connected to the outflow confluence groove 6 through the cooling medium outlet input end docking hole of the outflow confluence groove 6, and the output end of the cooling medium outlet 8 is connected to other equipment outside the sharp leading edge air inlet duct;

[0077] S11106, the inlet of the diverter channel 7 is connected to the inflow confluence groove 2 through the diverter channel inlet docking hole of the inflow confluence groove 2, and the outlet of the diverter channel 7 is connected to the outflow confluence groove 6 through the diverter channel outlet docking hole of the outflow confluence groove 6.

[0078] Furthermore, when the pressure of the cooling medium in the inflow channel 3 and the outflow channel 5 is greater than 50% of the cooling medium pressure required to cool the pointed leading edge air inlet to a specified temperature, the diversion channel 7 directs the excess cooling medium from the inflow confluence groove 2 directly into the outflow confluence groove 6, and flows out of the air inlet through the cooling medium outlet 8.

[0079] Furthermore, the cross-sectional areas of the cooling medium channels described in step S111 are equal.

[0080] Furthermore, the cooling medium channel described in step S111 is formed by 3D printing.

[0081] Furthermore, a method for determining the spacing between the inflow channel 3 and the outflow channel 5 arranged at equal intervals includes:

[0082] S1501, taking 40% of the inner flow channel area as the total bottom area of ​​the inflow channel 3 and the outflow channel 5;

[0083] S1502, according to the length and width of the rectangular bottom of the inflow channel 3 and the length and width of the rectangular bottom of the outflow channel 5, obtain the bottom area of ​​each inflow channel 3 and the outflow channel 5, and then according to the total bottom area of ​​the inflow channel 3 and the outflow channel 5, calculate the number of the inflow channels 3 and the outflow channels 5;

[0084] S1503, according to the ellipse C 2, the number of inflow channels 3 and outflow channels 5, and calculate the number of inflow channels 3 in the ellipse. C 2 The evenly distributed spacing on the circumference and the outflow channel 5 in the ellipse C 3. Uniformly distributed spacing on the circumference;

[0085] The bottom surface refers to the surface of the inner flow channel of the inlet channel 3 and the outflow channel 5 close to the sharp leading edge.

[0086] The present invention can achieve the following effects:

[0087] ① The present invention transfers the heat generated by the wall of the air inlet duct during operation by the flow of cooling medium in the cooling medium channel, thereby ensuring that the temperature of the air inlet duct is within the normal range and ensuring that the air inlet duct will not be damaged by high temperature; ② The present invention buries the cooling medium channel in the wall of the air inlet duct, which can not only ensure the heat dissipation efficiency of the air inlet duct, but also solve the problem of the troublesome installation of the air inlet duct cooling structure; ③ The present invention utilizes the movement of the cooling medium in the cooling medium channel to perform efficient heat exchange in the high-temperature area, which can significantly reduce the wall temperature of the air inlet duct when the air inlet duct is working, thereby achieving the sharpening of the leading edge of the air inlet duct and the lightweight structure, thereby effectively improving the performance of the air inlet duct, reducing the weight of the air inlet duct structure, and reducing the aerodynamic resistance of the air inlet duct; ④ The heat absorbed by the cooling medium through the air inlet duct can be used for other engine systems; ⑤ The technology of the present invention can be applied to a variety of air inlet duct configurations, such as the design of inward-rotating and binary rectangular air inlets. BRIEF DESCRIPTION OF THE DRAWINGS

[0088] Figure 1 It is a schematic diagram of a cooling medium channel for a high-efficiency heat transfer active cooling method for a sharp leading edge air inlet provided by an embodiment of the present invention;

[0089] Figure 2 is a schematic diagram of a sharp leading edge air inlet in a bottom flange perspective state provided by an embodiment of the present invention;

[0090] Figure 3 is an ellipse provided by an embodiment of the present invention C , C 1Contour, ellipse CSchematic diagram of the segmentation of the inlet and the wall segmentation of the pointed leading edge inlet;

[0091] Figure 4 is an ellipse provided by an embodiment of the present invention C 2. Ellipse C 3. Schematic diagram of the inflow channel 3 and the outflow channel 5;

[0092] Figure 5 is a schematic diagram of a sharp leading edge cooling channel provided by an embodiment of the present invention;

[0093] Figure 6 It is a schematic diagram of a cooling medium inlet, an inflow confluence groove, an inflow channel, an outflow channel, an outflow confluence groove, a flow diversion channel, a cooling medium outlet and their connections provided by an embodiment of the present invention;

[0094] 1-cooling medium inlet, 2-inflow confluence groove, 3-inflow channel, 4-sharp front edge cooling channel, 5-outflow channel, 6-outflow confluence groove, 7-diversion channel, 8-cooling medium outlet, 9-external compression section, 10-internal compression section, 11-bottom flange, 101-ellipse C , 102-ellipse C 1,103-Ellipse C 2,104-Ellipse C 3, 1001 is the front wall, 1002 is the rear wall, 1003 is the upper wall, 1004 is the lower wall, 41 is the first sharp front edge cooling channel, 42 is the second sharp front edge cooling channel, L 1- Split the ellipse C The first ray of L 2- Split Ellipse C The second ray of L 3- Split the ellipse C The third ray of L 4- Split the ellipse C The fourth ray of X -Coordinate system XOY The horizontal axis of Y - XOY The vertical axis of O -Coordinate system XOY The coordinate origin of . DETAILED DESCRIPTION

[0095] The following describes the embodiments of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention.

[0096] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments: Example

[0097] like Figure 1 to Figure 6 As shown, a high-efficiency heat transfer active cooling method for a sharp leading edge inlet comprises the following steps:

[0098] S1. A cooling medium channel is buried in the wall of the sharp leading edge air inlet duct, wherein the cooling medium channel includes a cooling medium inlet 1, an inflow confluence groove 2, an inflow channel 3, a sharp leading edge cooling channel 4, an outflow channel 5, an outflow confluence groove 6, a diversion channel 7 and a cooling medium outlet 8;

[0099] S2, the cooling medium enters from the cooling medium inlet 1 and flows into the confluence groove 2, flows through the inflow channel 3 and the sharp leading edge cooling channel 4 to the outflow channel 5, absorbs the heat of the inlet duct wall and is discharged to the outside of the inlet duct through the cooling medium outlet 8;

[0100] S3, the cooling medium enters the sharp leading edge cooling channel 4 from the outlet of the inlet channel 3, flows through the sharp leading edge cooling channel 4 to the outflow channel 5, absorbs the heat of the high heat flow area at the leading edge of the inlet duct, and discharges it to the outside of the inlet duct through the cooling medium outlet 8;

[0101] Among them, high heat flux refers to the heat flux with a circumferential temperature exceeding 1000K at the leading edge of the inlet tip.

[0102] Preferably, in step S1, burying a cooling medium channel in the wall surface of the sharp leading edge air inlet duct includes:

[0103] The step S1 of embedding a cooling medium channel in the wall surface of the sharp leading edge air inlet duct comprises:

[0104] S101, define the horizontal direction from left to right as the free flow direction, and place the sharp leading edge air inlet along the free flow direction with the inner surface of the outer compression section 9 of the sharp leading edge air inlet facing upward;

[0105] The pointed leading edge air inlet includes, from left to right, an outer compression section 9, an inner compression section 10 connected with the inlet and the end of the outer compression section 9, and a bottom flange 11 connected with the inlet end face and the outlet of the inner compression section 10;

[0106] S102, project the outer surface and inner surface of the compression section of the sharp leading edge inlet duct onto the outlet surface of the bottom flange 11 to obtain elliptical C 101 and Ellipse C 1102, the outlet surface facing the bottom flange 11, with the ellipse C The center of 101 is the coordinate origin O , along the ellipse C The long axis direction of 101 from left to right is X The positive direction of the axis, along the ellipseC The short axis direction of 101 is from bottom to top Y The positive direction of the axis establishes a plane rectangular coordinate system XOY , the pointed leading edge inlet compression section is the sum of the outer compression section 9 and the inner compression section 10;

[0107] by X The positive direction of the axis is the starting edge, and it rotates counterclockwise to the jth ray ol j Angle α j For the j The azimuth of the first ray is calculated by formula (1) j The azimuth of the ray, that is:

[0108] (1)

[0109] in, a is the ellipse C The length of the major semi-axis of 101, b is the ellipse C The length of the minor semi-axis of 101, j It is j The ray number, j =1~4 and j is an integer, π =180°;

[0110] With coordinate origin O As the endpoint, α j is the azimuth to the ellipse C Draw 4 rays around the circumference of 101 HE / HER 1~ HE / HER 4. The 4 rays divide the ellipse C 101 is divided into four elliptical sectors with equal areas along the circumferential direction; the rays HE / HER 1、 HE / HER 4. Ellipse C 101. Ellipse C 1102 is located in the plane rectangular coordinate system XOY The area between the first quadrant and the fourth quadrant is the front wall 1001, and the ray HE / HER 2、 HE / HER 3. Ellipse C 101. Ellipse C 1102 is located in the plane rectangular coordinate system XOY The area between the second quadrant and the third quadrant is the back wall 1002. HE / HER 1、 HE / HER 2. EllipseC 101. Ellipse C 1102 is located in the plane rectangular coordinate system XOY The area between the first quadrant and the second quadrant is the upper wall 1003, ray HE / HER 3、 HE / HER 4. Ellipse C 101. Ellipse C 1102 is located in the plane rectangular coordinate system XOY The area between the third quadrant and the fourth quadrant is the lower wall 1004;

[0111] S103, burying the inflow channel 3 inside the front wall surface 1001 and the rear wall surface 1002 described in step S102;

[0112] S104, burying the outflow channel 5 inside the upper wall surface 1003 and the lower wall surface 1004 described in step S102;

[0113] S105, burying a sharp front edge cooling channel 4 along the circumferential direction inside the sharp front edge of the outer compression section 9 in step S101;

[0114] S106, burying the inflow confluence groove 2 in the bottom flange 11 along the circumference of the bottom flange 11;

[0115] S107, burying the outflow confluence groove 6 in the bottom flange 11 along the circumference of the bottom flange 11;

[0116] S108, opening a cooling medium inlet 1 on the outlet surface of the bottom flange 11;

[0117] S109, opening a cooling medium outlet 8 on the outlet surface of the bottom flange 11;

[0118] S110, opening a diversion channel 7 in the bottom flange 11;

[0119] S111, connecting the cooling medium inlet 1, the inflow confluence groove 2, the inflow channel 3, the sharp leading edge cooling channel 4, the outflow channel 5, the outflow confluence groove 6, the diversion channel 7 and the cooling medium outlet 8 together to form a cooling medium channel.

[0120] Specifically: the cooling medium channel of the pointed leading edge air inlet duct includes an inlet channel 3, an outflow channel 5, an inflow confluence groove 2, an outflow confluence groove 6, a pointed leading edge cooling channel 4, a cooling medium inlet 1, a cooling medium outlet 8, a diversion channel 7, and a bottom flange 11. The heat of the air inlet duct wall is absorbed by the flow of the cooling medium in the cooling medium channel. The cooling medium inlet 1 and the cooling medium outlet 8 are connected to other systems.

[0121] Preferably, step S103 embeds the inflow channel 3 inside the front wall surface 1001 and the rear wall surface 1002 in step S102, specifically:

[0122] S10301, the inflow channel 3 is a plurality of channels with rectangular cross sections extending inside the front wall 1001 and the rear wall 1002 in step S102 along the free flow direction in step S101, and the cross section refers to a cross section perpendicular to the flow direction of the cooling medium flowing in the inflow channel 3;

[0123] S10302, the projection of the center line of the inflow channel 3 on the outlet surface of the bottom flange 11 is located at the ellipse C On the circumference of 2103, the ellipse C The center of 2103 coincides with the coordinate origin O described in step S102, and the ellipse C The shape of 2103 is determined by formula (2):

[0124] (2)

[0125] in, a 2 is the ellipse C The length of the major semi-axis of 2103, b 2 is the ellipse C The length of the minor semi-axis of 2103, a 21 is the ellipse described in step S102 C The length of the major semi-axis of 1102, b 21 is the ellipse described in step S102 C The length of the minor axis of 1102, a 22 is the ellipse described in step S102 C The length of the major semi-axis of 101, b 22 is the ellipse described in step S102 C The length of the minor semi-axis is 101;

[0126] S10303, inside the front wall 1001 and the rear wall 1002 described in step S102, from the inlet surface of the bottom flange 11 to the sharp front edge of the external compression section 9 described in step S101, along the elliptical C The inflow channels 3 are arranged at equal intervals on the circumference of 2 103, the end close to the inlet surface of the bottom flange 11 is the inlet of the inflow channel 3, and the end close to the sharp front edge is the outlet of the inflow channel 3.

[0127] Preferably, step S104 is to bury the outflow channel 5 inside the upper wall surface 1003 and the lower wall surface 1004 of step S102, specifically:

[0128] S10401, the outflow channel 5 is a plurality of channels with rectangular cross sections extending inside the upper wall 1003 and the lower wall 1004 in step S102 along the free flow direction in step S101, and the cross section refers to a cross section perpendicular to the flow direction of the cooling medium flowing in the outflow channel 5;

[0129] S10402, the projection of the center line of the outflow channel 5 on the outlet surface of the bottom flange 11 is located at the ellipse C 3 104 on the circumference, ellipse C The center of 3104 coincides with the coordinate origin O described in step S102, and the ellipse C The shape of 3104 is determined by formula (3):

[0130] (3)

[0131] in, a 2 is the ellipse described in step S10302 C The length of the major semi-axis of 2103, b 2 is the ellipse described in step S10302 C The length of the minor semi-axis of 2103, a 3 is the ellipse C The length of the major semi-axis of 3104, b 3 is the ellipse C The length of the minor semi-axis of 3104, d The ellipse C The length of the minor semi-axis of 2103 and the ellipse C The difference in the length of the minor semi-axis of 3104 is the ellipse C The length of the major semi-axis of 2103 and the ellipse C The difference in the length of the major semi-axis of 3104;

[0132] S10403, inside the upper wall 1003 and the lower wall 1004 described in step S102, from the inlet surface of the bottom flange 11 to the sharp front edge of the external compression section 9 described in step S101, along the elliptical C Outflow channels 5 are arranged at equal intervals on the circumference of 3104 , one end close to the inlet surface of the bottom flange 11 is the outlet of the outflow channel 5 , and one end close to the sharp front edge is the inlet of the outflow channel 5 .

[0133] Specifically, the inflow channel 3 and the outflow channel 5 are buried inside the wall of the air inlet duct, and the specific positions are as follows: the inflow channel 3 is arranged on the left and right sides of the inner flow channel of the air inlet duct, and is arranged from the bottom flange 11 to the front edge of the air inlet duct. The cooling medium can quickly reach the front edge through the low heat flow area. The outflow channel 5 is arranged on the upper and lower surfaces of the inner flow channel of the air inlet duct, and is arranged from the front edge of the air inlet duct to the bottom flange 11. The cooling medium can absorb the heat generated by the high heat flow area at the front edge of the air inlet duct. The high heat flow refers to the heat flow with a temperature exceeding 1000K in the circumferential direction of the front edge of the air inlet tip.

[0134] Preferably, step S105 embeds a sharp front edge cooling channel 4 along the circumferential direction inside the sharp front edge of the outer compression section 9 in step S101, specifically:

[0135] S10501, facing the outlet surface of the bottom flange 11, on the outer compression section 9, located in the plane rectangular coordinate system described in step S102 XOY The first sharp front edge cooling channel 41 is buried along the circumferential direction of the sharp front edge in the sharp front edge area corresponding to the third quadrant and the fourth quadrant. The end face of the first sharp front edge cooling channel is sealed and located in the third quadrant. The first end of the first sharp front edge cooling channel 41 cannot reach X The negative half axis position of the shaft, the end face of the tail end of the first sharp leading edge cooling channel is sealed and located in the fourth quadrant, and the tail end of the first sharp leading edge cooling channel 41 cannot reach X The positive half axis position of the axis;

[0136] The plane rectangular coordinate system described in step S102 is located on the outer compression section 9 XOY The first quadrant and the second quadrant corresponding to the sharp leading edge are provided with a second sharp leading edge cooling channel 42 buried along the circumferential direction of the sharp leading edge. The end surface of the first end of the second sharp leading edge cooling channel is sealed and located in the first quadrant. The first end of the second sharp leading edge cooling channel 42 cannot reach X The end face of the tail end of the second sharp front edge cooling channel 42 is sealed and located in the second quadrant. The tail end of the second sharp front edge cooling channel 42 cannot reach X Negative half axis position of the axis;

[0137] The first sharp leading edge cooling channel 41 and the second sharp leading edge cooling channel 42 constitute the sharp leading edge cooling channel 4;

[0138] S10502, intersecting the center line of the inflow channel 3 described in step S10302 and the center line of the outflow channel 5 described in step S10402 with the right side surface of the sharp front edge cooling channel 4 to obtain a series of intersections, starting from the head end of the first sharp front edge cooling channel 41 to the tail end of the second sharp front edge cooling channel 42, and opening an inflow channel 3 outlet docking hole directly opposite to the inflow channel 3 outlet and an outflow channel 5 inlet docking hole directly opposite to the outflow channel 5 inlet on the right side surface with the intersections as the center, respectively, wherein the shape of the inflow channel 3 outlet docking hole is the same as the shape of the inflow channel 3 cross section, and the shape of the outflow channel 5 inlet docking hole is the same as the shape of the outflow channel 5 cross section;

[0139] The cross section of the inflow channel 3 refers to the cross section perpendicular to the flow direction of the cooling medium in the inflow channel 3, the cross section of the outflow channel 5 refers to the cross section perpendicular to the flow direction of the cooling medium in the outflow channel 5, and the right side surface refers to the surface on the tip leading edge cooling channel 4 that is opposite to the outlet of the inflow channel 3 and the inlet of the outflow channel 5.

[0140] Specifically: the sharp leading edge cooling channel 4 is arranged inside the leading edge of the sharp leading edge air inlet, evenly arranged around the leading edge of the air inlet, as close to the leading edge as possible while meeting the structural strength requirements, and connected to the inflow channel 3 and the outflow channel 5 to keep the channel unobstructed;

[0141] The pointed leading edge cooling channel 4 is divided into two and is arranged circumferentially along the pointed leading edge of the pointed leading edge inlet duct. The second pointed leading edge cooling channel is arranged at the pointed leading edge of the upper half of the inlet duct, and the first pointed leading edge cooling channel is arranged at the pointed leading edge of the lower half of the inlet duct. Both ends of the two pointed leading edge cooling channels are sealed. The second pointed leading edge cooling channel includes the inflow channel outlet of the front wall surface 1001 and the rear wall surface 1002 of the upper half of the inlet duct and the outflow channel inlet of the upper wall surface 1003 of the inlet duct. The first pointed leading edge cooling channel includes the inflow channel outlet of the front wall surface 1001 and the rear wall surface 1002 of the lower half of the inlet duct and the inflow channel inlet. At the inlet of the outflow channel of the lower wall surface 1004 of the air duct, the sharp leading edge cooling channel 4 is divided into two settings, which can ensure that the cooling medium flowing out from the outlet of the inflow channel 3 can flow out from the inlet of the outflow channel 5 in an orderly manner after passing through the sharp leading edge cooling channel 4, so as to discharge the high heat flow at the sharp leading edge of the air inlet duct to the outside of the air inlet duct through the cooling medium. If the sharp leading edge cooling channel is not set in two, the flow of the cooling medium in the sharp leading edge cooling channel 4 will be turbulent, and it will be impossible to quickly discharge the high heat flow of the air inlet duct to the outside of the air inlet duct. The high heat flow refers to the heat flow with a temperature exceeding 1000K in the circumferential direction of the sharp leading edge of the air inlet duct.

[0142] Preferably, step S106 is to bury the inflow confluence groove 2 in the bottom flange 11 along the circumference of the bottom flange 11, specifically:

[0143] S10601, draw the ellipse described in step S10302 in a plane whose distance from the inlet surface of the bottom flange 11 is half the thickness of the bottom flange and which is parallel to the inlet surface of the bottom flange 11 C 2103, an inflow confluence groove 2 with a right-angled trapezoidal cross section is provided along the circumference of the bottom flange 11, the upper bottom of the right-angled trapezoid is designed to be an arc shape, the acute angle of the trapezoid is ≤45°, facing the outlet surface of the bottom flange 11, the inflow confluence groove 2 is elliptical C The circumference of 2103 is the center line extending clockwise, flowing into the end face seal of the head end of the confluence groove 2, and is located in the rectangular coordinate system described in step S102 XOY In the third quadrant, the end face of the inflow confluence trough 2 is X The angle of the negative half axis is 3-8°, and the end face of the tail end of the confluence groove 2 is sealed and located in the rectangular coordinate system described in step S102 XOY In the fourth quadrant, the end face of the confluence groove 2 at the end of the confluence groove 2 is X The angle of the positive semi-axis is 6-10°;

[0144] S10602, extending the center line of the inflow channel 3 toward the left side surface of the inflow confluence groove 2 to obtain a series of intersections, and opening inlet docking holes of the inflow channel 3 in sequence on the left side surface of the inflow confluence groove 2 from the head end to the tail end of the inflow confluence groove 2 with these intersections as the center, and the shape and size of the inlet docking holes of the inflow channel are the same as the shape and size of the cross section of the inflow channel 3;

[0145] The left side surface is the surface of the inlet surface of the flow-in confluence trough 2 close to the bottom flange 11;

[0146] S10603, according to step S10302, the ellipse C The circumference of 2103 is the same as that of step S102 X The intersection of the negative half axis of the axis is taken as the starting point, a vertical line perpendicular to the outlet surface of the bottom flange 11 is drawn, and a cooling medium inlet and output end docking hole with the same cross-sectional shape and size as the output end of the cooling medium inlet 1 is opened on the right side surface of the inflow confluence groove 2 with the vertical line as the center line. The right side surface refers to the surface of the inflow confluence groove 2 close to the outlet surface of the bottom flange 11;

[0147] S10604, on the inner surface of the inflow confluence trough 2, facing the coordinate origin described in step S102 O On the surface, in the rectangular coordinate system described in step S102 XOY The fourth quadrant and X The straight line with an angle of 6° between the positive semi-axis and the ellipse described in step S10302 CThe intersection of the circumference of 2103 is taken as the center, and a diversion channel entrance docking hole with the same shape and size as the entrance cross-section of the diversion channel 7 is opened, and the center line of the docking hole is aligned with the ellipse described in step S10302. C The circumferences of 2103 intersect vertically;

[0148] The cross section refers to a cross section perpendicular to the flow direction of the coolant in the inflow collecting channel 2 .

[0149] Preferably, step S107 embeds the outflow confluence groove 6 in the bottom flange 11 along the circumference of the bottom flange 11, specifically:

[0150] S10701, draw the ellipse described in step S10402 in a plane whose distance from the inlet surface of the bottom flange 11 is half the thickness of the bottom flange and which is parallel to the inlet surface of the bottom flange 11 C 3104, an outflow confluence groove 6 with a right-angled trapezoidal cross section is provided along the circumference of the bottom flange 11, the upper bottom of the right-angled trapezoid is designed to be an arc shape, the acute angle of the trapezoid is ≤45°, facing the outlet surface of the bottom flange 11, the outflow confluence groove 6 is elliptical C The circumference of 3104 is extended clockwise from the center line, and the end surface of the head end of the outflow confluence groove 6 is sealed and located in the rectangular coordinate system described in step S102 XOY In the second quadrant, the end surface of the outflow confluence groove 6 is X The angle of the negative half axis is 15-20°, and the end face of the outflow confluence groove 6 is sealed and located in the rectangular coordinate system described in step S102 XOY In the third quadrant, the end surface of the outflow confluence groove 6 is X The angle of the negative half axis is 8-10°;

[0151] S10702, extending the center line of the outflow channel 5 toward the left side surface of the outflow confluence groove 6 to obtain a series of intersections, and opening outflow channel outlet docking holes in sequence from the head end to the tail end of the outflow confluence groove 6 on the left side surface of the outflow confluence groove 6 with these intersections as the center, and the shape and size of the outflow channel outlet docking holes are the same as the shape and size of the cross section of the outflow channel 5;

[0152] The left side surface is the surface of the outflow confluence groove 6 close to the inlet surface of the bottom flange 11;

[0153] S10703, according to step S10402, the ellipse C The circumference of 3104 is the same as that of step S102 XThe intersection of the positive half axis of the axis is taken as the starting point, and a vertical line perpendicular to the outlet surface of the bottom flange 11 is drawn. With the vertical line as the center line, a cooling medium outlet input end docking hole with the same cross-sectional shape and size as the output end of the cooling medium outlet 8 is opened on the right side surface of the outflow confluence groove 6. The right side surface refers to the surface of the outflow confluence groove 6 close to the outlet surface of the bottom flange 11;

[0154] S10704, on the inner surface of the outflow confluence groove 6, facing the coordinate origin described in step S102 O On the surface, in the rectangular coordinate system described in step S102 XOY The fourth quadrant and X The straight line with an angle of 6° between the positive semi-axis and the ellipse described in step S10402 C With the intersection of the circumference of 3104 as the center, a diversion channel outlet docking hole having the same shape and size as the outlet cross-section of the diversion channel 7 is opened;

[0155] The cross section refers to a cross section perpendicular to the flow direction of the coolant in the outflow collecting groove 6 .

[0156] Specifically: the inflow confluence groove 2 and the outflow confluence groove 6 are arranged inside the bottom flange 11. The inflow confluence groove 2 is mainly used for the distribution of cooling medium and is arranged at the starting position of the inflow channel 3. The outflow confluence groove 6 is mainly used for the collection of cooling medium and is arranged at the end position of the outflow channel 5.

[0157] Preferably, step S108 is to open a cooling medium inlet 1 on the outlet surface of the bottom flange 11, specifically:

[0158] On the outlet surface of the bottom flange 11, at the negative half axis position of the X axis in step S102, a cooling medium inlet 1 is provided, the cross-sectional shape of the cooling medium inlet 1 is circular, the end of the cooling medium inlet 1 close to the outlet surface of the bottom flange 11 is the input end of the cooling medium inlet 1, the end of the cooling medium inlet 1 close to the flow confluence groove 2 is the output end of the cooling medium inlet, and the center line of the cooling medium inlet 1 is aligned with the ellipse in step S10301. C The circumferences of 2103 intersect vertically;

[0159] The cross section refers to a cross section perpendicular to the flow direction of the coolant in the coolant inlet 1 .

[0160] Preferably, step S109 is to open a cooling medium outlet 8 on the outlet surface of the bottom flange 11, specifically:

[0161] On the outlet surface of the bottom flange 11, at the positive half axis position of the X axis described in step S102, a cooling medium outlet 8 is provided, the cross-sectional shape of the cooling medium outlet 8 is circular, the end of the cooling medium outlet 8 close to the outlet surface of the bottom flange 11 is the output end of the cooling medium outlet 8, the end of the cooling medium outlet 8 close to the outflow confluence groove 6 is the input end of the cooling medium outlet 8, and the center line of the cooling medium outlet 8 is aligned with the ellipse described in step S10401 C The circumferences of 3104 intersect perpendicularly;

[0162] The cross section refers to a cross section perpendicular to the flow direction of the coolant in the coolant outlet 8 .

[0163] Preferably, step S110 is to open the diversion channel 7 in the bottom flange 11, specifically:

[0164] S11001, connecting the center of the outlet docking hole of the flow diversion channel on the inflow confluence trough 2 and the center of the inlet docking hole of the flow diversion channel on the outflow confluence trough 6 to obtain the center line of the flow diversion channel;

[0165] S11002. With the center line of the diverter channel as the center, a diverter channel 7 is opened between the inflow confluence groove 2 and the outflow confluence groove 6 in the bottom flange 11. The side of the diverter channel 7 close to the inflow confluence groove 2 is the outlet of the diverter channel, and the side of the diverter channel 7 close to the outflow confluence groove 6 is the inlet of the diverter channel. The shape of the cross section of the diverter channel 7 is the same as the cross section of the inflow confluence groove 2 and the outflow confluence groove 6. The size of the cross section of the diverter channel 7 is the same as the size of the diverter channel inlet docking hole on the inflow confluence groove 2 and the diverter channel outlet docking hole on the outflow confluence groove 6.

[0166] The cross section refers to a cross section perpendicular to the flow direction of the coolant in the branch channel 7 .

[0167] Preferably, step S111 connects the cooling medium inlet 1, the inflow confluence groove 2, the inflow channel 3, the sharp leading edge cooling channel 4, the outflow channel 5, the outflow confluence groove 6, the diversion channel 7 and the cooling medium outlet 8 together to form a cooling medium channel, specifically:

[0168] S11101, the input end of the cooling medium inlet 1 is connected to the cooling medium input pipeline, and the output end of the cooling medium inlet 1 is connected to the inflow confluence groove 2 through the cooling medium inlet output end docking hole on the inflow confluence groove 2;

[0169] S11102, the inlet of the inflow channel 3 is connected to the inflow confluence groove 2 through the inflow channel inlet docking hole on the inflow confluence groove 2 corresponding to the inflow channel 3 inlet, and the outlet of the inflow channel 3 is connected to the sharp front edge cooling channel 4 through the inflow channel outlet docking hole on the sharp front edge cooling channel 4 corresponding to the outlet of the inflow channel 3;

[0170] S11103, the sharp leading edge cooling channel 4 is connected with the outflow channel 5 through the outflow channel inlet docking hole on the sharp leading edge cooling channel 4 corresponding to the inlet of the outflow channel 5;

[0171] S11104, the outlet of the outflow channel 5 is connected to the outflow confluence groove 6 through the outflow channel outlet docking hole on the outflow confluence groove 6 corresponding to the outlet of the outflow channel 5;

[0172] S11105, the input end of the cooling medium outlet 8 is connected to the outflow confluence groove 6 through the cooling medium outlet input end docking hole of the outflow confluence groove 6, and the output end of the cooling medium outlet 8 is connected to other equipment outside the sharp leading edge air inlet duct;

[0173] S11106, the inlet of the diverter channel 7 is connected to the inflow confluence groove 2 through the diverter channel inlet docking hole of the inflow confluence groove 2, and the outlet of the diverter channel 7 is connected to the outflow confluence groove 6 through the diverter channel outlet docking hole of the outflow confluence groove 6.

[0174] Preferably, when the pressure of the cooling medium in the inflow channel 3 and the outflow channel 5 is greater than 50% of the cooling medium pressure required to cool the sharp leading edge air inlet to a specified temperature, the diverter channel 7 directly merges the excess cooling medium from the inflow confluence groove 2 into the outflow confluence groove 6, and flows out of the air inlet through the cooling medium outlet 8;

[0175] Specifically: the diversion channel 7 directly connects the inflow and outflow confluence grooves 2 and 6, which can distribute the cooling medium flow, match the cooling medium required by the air intake duct, and directly flow the excess cooling medium to the cooling medium outlet 8 through the diversion channel 7, thereby ensuring the energy efficiency ratio of the cooling structure and the utilization rate of the cooling medium.

[0176] Preferably, the cross-sectional areas of the cooling medium channels in step S111 are equal;

[0177] Specifically, the cross-sectional areas of the cooling medium channels are equal, which can reduce the flow resistance of the cooling medium in the cooling medium channels.

[0178] Preferably, the cooling medium channel in step S111 is formed by 3D printing;

[0179] Specifically: the inflow channel 3 and the outflow channel 5 use strip holes with rectangular cross-sections to ensure the flow rate of the cooling medium channel and also meet the process requirements of 3D printing;

[0180] The cross-sectional shape of the inflow confluence groove 2 and the outflow confluence groove 6 is a right-angle trapezoid, which is convenient for the confluence groove position to be formed. At the same time, this shape can ensure the removal of residual powder at the top position. The upper bottom of the right-angle trapezoid is designed to be an arc shape, and the acute angle of the trapezoid is ≤45°, which is convenient for forming during the printing process;

[0181] The pointed leading edge cooling channel 4 is arranged near the leading edge of the air inlet duct. The pointed leading edge cooling channel is designed according to the size of the leading edge chamfer and is as close to the pointed leading edge of the air inlet duct as possible. The minimum top width of the pointed leading edge cooling channel is ≥0.6mm, and the minimum fillet is ≥R0.25mm, which can ensure the removal of residual powder at the sharp leading edge top position of the pointed leading edge cooling channel 4.

[0182] Preferably, a method for determining the spacing between the inflow channel 3 and the outflow channel 5 arranged at equal intervals includes:

[0183] S1501, taking 40% of the inner flow channel area as the total bottom area of ​​the inflow channel 3 and the outflow channel 5;

[0184] S1502, according to the length and width of the rectangular bottom of the inflow channel 3 and the length and width of the rectangular bottom of the outflow channel 5, obtain the bottom area of ​​each inflow channel 3 and the outflow channel 5, and then according to the total bottom area of ​​the inflow channel 3 and the outflow channel 5, calculate the number of the inflow channels 3 and the outflow channels 5;

[0185] S1503, according to the ellipse C 2103, the number of inflow channel 3 and outflow channel 5, and calculate the number of inflow channel 3 in the ellipse. C 2103 The uniformly distributed spacing on the circumference and the outflow channel 5 on the ellipse C 3104Evenly spaced spacing on the circumference;

[0186] The bottom surface refers to the surface of the inner flow channel of the inlet channel 3 and the outflow channel 5 close to the sharp leading edge;

[0187] Specifically: the number of inflow channels 3 and outflow channels 5 is arranged according to the size of the flow channel surface in the intake channel, and the cooling medium channels of the inflow channels 3 and the outflow channels 5 are spaced a certain distance apart and arranged parallel or approximately parallel to the local surface.

[0188] The above is only an embodiment of the present invention, and the common knowledge such as the known specific structure and / or characteristics in the scheme is not described in detail here. It should be pointed out that for those skilled in the art, without departing from the technical solution of the present invention, several modifications and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A high-efficiency heat transfer active cooling method for a sharp leading edge air inlet, characterized in that: The steps include: S1. A cooling medium channel is buried in the wall of the sharp leading edge air inlet duct, wherein the cooling medium channel includes a cooling medium inlet, an inflow confluence groove, an inflow channel, a sharp leading edge cooling channel, an outflow channel, an outflow confluence groove, a flow diversion channel and a cooling medium outlet; S2, the cooling medium enters the flow confluence groove from the cooling medium inlet, flows to the outflow channel through the inflow channel and the sharp leading edge cooling channel, absorbs the heat of the inlet duct wall and is discharged to the outside of the inlet duct through the cooling medium outlet; S3, the cooling medium enters the sharp leading edge cooling channel from the outlet of the inlet channel, flows through the sharp leading edge cooling channel to the outflow channel, absorbs the heat of the high heat flow area at the leading edge of the inlet duct, and discharges it to the outside of the inlet duct through the cooling medium outlet; Among them, high heat flux refers to the heat flux with a circumferential temperature exceeding 1000K at the leading edge of the inlet tip; When the pressure of the cooling medium in the inflow channel and the outflow channel is greater than 50% of the cooling medium pressure required to cool the sharp leading edge air inlet to a specified temperature, the flow diversion channel directly merges the excess cooling medium from the inflow confluence groove into the outflow confluence groove, and flows out of the air inlet through the cooling medium outlet; The step S1 of embedding a cooling medium channel in the wall surface of the sharp leading edge air inlet duct comprises: S101, define the horizontal direction from left to right as the free flow direction, and place the sharp leading edge air inlet along the free flow direction with the inner surface of the outer compression section of the sharp leading edge air inlet facing upward; The pointed leading edge air inlet comprises, from left to right, an outer compression section, an inner compression section connected with the inlet and the end of the outer compression section, and a bottom flange connected with the inlet end face and the outlet of the inner compression section; S102, project the outer surface and inner surface of the compression section of the pointed leading edge inlet duct onto the bottom flange outlet surface to obtain ellipses C and ellipse C 1. The outlet surface facing the bottom flange is the ellipse C The center is the coordinate origin O , along the ellipse C The long axis direction from left to right is X The positive direction of the axis, along the ellipse C The minor axis direction from bottom to top is Y The positive direction of the axis establishes a plane rectangular coordinate system XOY , the pointed leading edge inlet compression section is the sum of the outer compression section and the inner compression section; by X The positive direction of the axis is the starting edge, and it rotates counterclockwise to the jth ray ol j Angle α j For the j The azimuth of the first ray is calculated by formula (1) j The azimuth of the ray, that is: (1) in, a is the ellipse C The length of the major semi-axis, b is the ellipse C The length of the minor semiaxis, j It is j The ray number, j =1~4 and j is an integer, π =180°; With coordinate origin O As the endpoint, α j is the azimuth to the ellipse C Draw 4 rays around the circumference of OL 1~ OL 4. The 4 rays divide the ellipse C Divided into 4 elliptical sectors of equal area along the circumference; OL 1、 OL 4. Ellipse C ,oval C 1 is surrounded by a rectangular coordinate system located in the plane XOY The area between the first and fourth quadrants is the front wall, and the ray OL 2、 OL 3. Ellipse C ,oval C 1 is surrounded by a rectangular coordinate system located in the plane XOY The area between the second and third quadrants is the back wall, and the rays OL 1、 OL 2. Ellipse C ,oval C 1 is surrounded by a rectangular coordinate system located in the plane XOY The area between the first quadrant and the second quadrant is the upper wall. OL 3、 OL 4. Ellipse C ,oval C 1 is surrounded by a rectangular coordinate system located in the plane XOY The area between the third and fourth quadrants is the lower wall; S103, burying inflow channels inside the front wall surface and the rear wall surface described in step S102; S104, burying outflow channels inside the upper wall surface and the lower wall surface described in step S102; S105, burying a sharp front edge cooling channel along the circumferential direction inside the sharp front edge of the outer compression section in step S101; S106. In the bottom flange, an inflow confluence groove is buried along the circumference of the bottom flange; S107, burying an outflow confluence groove in the bottom flange along the circumference of the bottom flange; S108. A cooling medium inlet is provided on the bottom flange outlet surface; S109, a cooling medium outlet is provided on the bottom flange outlet surface; S110, opening a diversion channel in the bottom flange; S111, connecting the cooling medium inlet, the inflow confluence groove, the inflow channel, the sharp leading edge cooling channel, the outflow channel, the outflow confluence groove, the diversion channel and the cooling medium outlet together to form a cooling medium channel; S103: burying the inflow channel inside the front wall and the rear wall described in step S102, specifically: S10301, the inflow channel is a plurality of channels with rectangular cross sections extending in the free flow direction in step S101 inside the front wall surface and the rear wall surface in step S102, wherein the cross section refers to a cross section perpendicular to the flow direction of the cooling medium flowing in the inflow channel; S10302. The projection of the center line of the inflow channel on the bottom flange outlet surface is located at the ellipse C 2, the ellipse C The center of 2 coincides with the coordinate origin O described in step S102, and the ellipse C The shape of 2 is determined by formula (2): (2) in, a 2 is the ellipse C 2 is the length of the semi-major axis, b 2 is the ellipse C 2's semi-minor axis length, a 21 is the ellipse described in step S102 C 1 is the length of the semi-major axis, b 21 is the ellipse described in step S102 C 1 is the length of the minor semi-axis, a 22 is the ellipse described in step S102 C The length of the major semi-axis, b 22 is the ellipse described in step S102 C The length of the minor semi-axis; S10303, inside the front wall and the rear wall described in step S102, from the bottom flange inlet surface to the sharp front edge of the external compression section described in step S101, along the ellipse described in step S10302 C The inflow channels are arranged at equal intervals on the circumference of 2, the end close to the inlet surface of the bottom flange is the inlet of the inflow channel, and the end close to the sharp front edge is the outlet of the inflow channel; S104: burying outflow channels inside the upper wall and the lower wall described in step S102, specifically: S10401, the outflow channel is a plurality of channels with rectangular cross sections extending in the free flow direction in step S101 inside the upper wall surface and the lower wall surface in step S102, wherein the cross section refers to a cross section perpendicular to the flow direction of the cooling medium flowing in the outflow channel; S10402, the projection of the center line of the outflow channel on the bottom flange outlet surface is located in the ellipse C 3 on the circumference, ellipse C The center of 3 coincides with the coordinate origin O in step S102, and the ellipse C The shape of 3 is determined by formula (3): (3) in, a 2 is the ellipse described in step S10302 C 2 is the length of the semi-major axis, b 2 is the ellipse described in step S10302 C 2's semi-minor axis length, a 3 is the ellipse C 3 is the length of the semi-major axis, b 3 is the ellipse C 3's semi-minor axis length, d The ellipse C The length of the minor axis of 2 and the ellipse C 3, the difference in the length of the minor semi-axis is the ellipse C The length of the major axis of 2 and the ellipse C 3. S10403, inside the upper wall surface and the lower wall surface described in step S102, from the bottom flange inlet surface to the sharp front edge of the external compression section described in step S101, along the ellipse described in step S10402 C Outflow channels are arranged at equal intervals on the circumference of 3, one end close to the inlet surface of the bottom flange is the outlet of the outflow channel, and the end close to the sharp front edge is the inlet of the outflow channel; S105: a sharp front edge cooling channel is buried in the sharp front edge of the outer compression section in the circumferential direction, specifically: S10501, facing the bottom flange outlet surface, on the external compression section, located in the plane rectangular coordinate system described in step S102 XOY The first sharp front edge cooling channel is buried in the sharp front edge area corresponding to the third quadrant and the fourth quadrant along the circumferential direction of the sharp front edge, and the end face of the first sharp front edge cooling channel is sealed and located in the third quadrant, and the first end of the first sharp front edge cooling channel cannot reach X The negative half-axis position of the shaft, the end face of the tail end of the first sharp leading edge cooling channel is sealed and located in the fourth quadrant, and the tail end of the first sharp leading edge cooling channel cannot reach X The positive half axis position of the axis; The plane rectangular coordinate system in step S102 is located on the outer compression section XOY The sharp leading edge corresponding to the first quadrant and the second quadrant is provided with a second sharp leading edge cooling channel buried along the circumferential direction of the sharp leading edge. The end face of the first end of the second sharp leading edge cooling channel is sealed and located in the first quadrant. The first end of the second sharp leading edge cooling channel cannot reach X The end face of the tail end of the second sharp leading edge cooling channel is sealed and located in the second quadrant. The tail end of the second sharp leading edge cooling channel cannot reach X Negative half axis position of the axis; The first sharp leading edge cooling channel and the second sharp leading edge cooling channel constitute a sharp leading edge cooling channel; S10502, intersecting the center line of the inflow channel in step S10302 and the center line of the outflow channel in step S10402 with the right side surface of the sharp front edge cooling channel to obtain a series of intersection points, starting from the head end of the first sharp front edge cooling channel to the tail end of the second sharp front edge cooling channel, and opening an inflow channel outlet docking hole directly opposite to the inflow channel outlet and an outflow channel inlet docking hole directly opposite to the outflow channel inlet on the right side surface with the intersection points as the center, respectively, wherein the shape of the inflow channel outlet docking hole is the same as the shape of the inflow channel cross section, and the shape of the outflow channel inlet docking hole is the same as the shape of the outflow channel cross section; The inflow channel cross section refers to the cross section perpendicular to the flow direction of the cooling medium in the inflow channel, the outflow channel cross section refers to the cross section perpendicular to the flow direction of the cooling medium in the outflow channel, and the right side surface refers to the surface on the tip leading edge cooling channel opposite to the inflow channel outlet and the outflow channel inlet.

2. The high-efficiency heat transfer active cooling method for a sharp leading edge air inlet according to claim 1, characterized in that: S106 In the bottom flange, an inflow confluence groove is buried along the circumference of the bottom flange, specifically: S10601. Draw the ellipse described in step S10302 in a plane whose distance from the inlet surface of the bottom flange is half the thickness of the bottom flange and which is parallel to the inlet surface of the bottom flange. C 2. A flow confluence groove with a right-angled trapezoidal cross section is provided along the circumference of the bottom flange. The upper bottom of the right-angled trapezoid is designed to be an arc shape. The acute angle of the trapezoid is ≤ 45°. Facing the outlet surface of the bottom flange, the flow confluence groove is shaped like the ellipse. C 2 extends clockwise from the center line, flows into the end face seal at the head end of the confluence trough, and is located in the rectangular coordinate system described in step S102 XOY In the third quadrant, the end face of the inflow confluence trough is X The angle of the negative half axis is 3-8°, and the end face of the end of the confluence groove is sealed and located in the rectangular coordinate system described in step S102 XOY In the fourth quadrant, the end face of the confluence trough tail end is X The angle of the positive semi-axis is 6-10°; S10602, extending the center line of the inflow channel toward the left side surface of the inflow confluence trough to obtain a series of intersections, and opening inlet docking holes of the inflow channel in sequence from the head end to the tail end of the inflow confluence trough on the left side surface of the inflow confluence trough with these intersections as the center, wherein the shape and size of the inlet docking holes of the inflow channel are the same as the shape and size of the cross section of the inflow channel; The left side surface is the surface of the inlet surface of the flow channel close to the bottom flange; S10603, according to step S10302, the ellipse C 2 and the circumference of step S102 X Taking the intersection of the negative half axis of the axis as the starting point, draw a vertical line perpendicular to the outlet surface of the bottom flange, and taking the vertical line as the center line, on the right side surface of the inflow confluence groove, open a cooling medium inlet and outlet end docking hole with the same cross-sectional shape and size as the output end of the cooling medium inlet. The right side surface refers to the surface of the inflow confluence groove close to the outlet surface of the bottom flange; S10604, on the inner surface of the inflow confluence trough, facing the coordinate origin described in step S102 O On the surface, in the rectangular coordinate system described in step S102 XOY The fourth quadrant and X The straight line with an angle of 6° between the positive semi-axis and the ellipse described in step S10302 C 2 is taken as the center, a diversion channel entrance docking hole with the same shape and size as the entrance cross-section of the diversion channel is opened, and the center line of the docking hole is aligned with the ellipse described in step S10302. C 2's circumferences intersect perpendicularly; The cross section refers to the cross section perpendicular to the flow direction of the cooling medium in the inflow conduit.

3. The high-efficiency heat transfer active cooling method for a sharp leading edge air inlet according to claim 2, characterized in that: S107: In the bottom flange, an outflow confluence groove is buried along the circumference of the bottom flange, specifically: S10701. Draw the ellipse described in step S10402 in a plane whose distance from the inlet surface of the bottom flange is half the thickness of the bottom flange and which is parallel to the inlet surface of the bottom flange. C 3. An inflow confluence groove with a right-angled trapezoidal cross section is provided along the circumference of the bottom flange. The upper base of the right-angled trapezoid is designed to be an arc shape. The acute angle of the trapezoid is ≤ 45°. Facing the outlet surface of the bottom flange, the outflow confluence groove is shaped like the ellipse. C 3 is the center line extending clockwise, and the end surface of the flow out of the confluence trough is sealed and located in the rectangular coordinate system described in step S102 XOY In the second quadrant, the end face of the outflow confluence trough is X The angle of the negative half axis is 15-20°, and the end face of the outflow confluence trough tail end is sealed and located in the rectangular coordinate system described in step S102 XOY In the third quadrant, the end face of the outflow confluence trough is X The angle of the negative half axis is 8-10°; S10702, extending the center line of the outflow channel toward the left side surface of the outflow confluence trough to obtain a series of intersections, and opening outflow channel outlet docking holes in sequence from the head end to the tail end of the outflow confluence trough on the left side surface of the outflow confluence trough with these intersections as the center, wherein the shape and size of the outflow channel outlet docking holes are the same as the shape and size of the cross section of the outflow channel; The left surface is the surface of the outflow confluence trough close to the inlet surface of the bottom flange; S10703, according to step S10402, the ellipse C The circumference of 3 is the same as that of step S102 X Taking the intersection of the positive half axis of the axis as the starting point, draw a vertical line perpendicular to the outlet surface of the bottom flange, and taking the vertical line as the center line, on the right side surface of the outflow confluence groove, open a cooling medium outlet input end docking hole with the same cross-sectional shape and size as the output end of the cooling medium outlet. The right side surface refers to the surface of the outflow confluence groove close to the outlet surface of the bottom flange; S10704, on the inner surface of the outflow confluence trough, facing the coordinate origin described in step S102 O On the surface, in the rectangular coordinate system described in step S102 XOY The fourth quadrant and X The straight line with an angle of 6° between the positive semi-axis and the ellipse described in step S10402 C 3 is taken as the center, and a diversion channel outlet docking hole having the same shape and size as the outlet cross-section of the diversion channel is opened; The cross section refers to the cross section perpendicular to the flow direction of the cooling medium in the outflow conduit.

4. The high-efficiency heat transfer active cooling method for a sharp leading edge air inlet according to claim 3, characterized in that: S108 has a cooling medium inlet on the bottom flange outlet surface, specifically: On the bottom flange outlet surface, at the negative half axis position of the X axis in step S102, a cooling medium inlet is provided, the cross-sectional shape of the cooling medium inlet is circular, the end of the cooling medium inlet close to the bottom flange outlet surface is the input end of the cooling medium inlet, the end of the cooling medium inlet close to the inflow confluence groove is the output end of the cooling medium inlet, and the center line of the cooling medium inlet is aligned with the ellipse in step S10301 C 2's circumferences intersect perpendicularly; The cross section refers to a cross section perpendicular to the flow direction of the coolant in the coolant inlet.

5. The high-efficiency heat transfer active cooling method for a sharp leading edge air inlet according to claim 4, characterized in that: S109 has a cooling medium outlet on the bottom flange outlet surface, specifically: On the bottom flange outlet surface, at the positive half axis position of the X axis described in step S102, a cooling medium outlet is provided, the cross-sectional shape of the cooling medium outlet is circular, the end of the cooling medium outlet close to the bottom flange outlet surface is the output end of the cooling medium outlet, the end of the cooling medium outlet close to the outflow confluence groove is the input end of the cooling medium outlet, and the center line of the cooling medium outlet is aligned with the ellipse described in step S10401 C The circumferences of 3 intersect vertically; The cross section refers to a cross section perpendicular to the flow direction of the coolant in the coolant outlet.

6. The high-efficiency heat transfer active cooling method for a sharp leading edge air inlet according to claim 5, characterized in that: S110 has a diversion channel in the bottom flange, specifically: S11001, connecting the center of the outlet docking hole of the flow diversion channel on the inflow confluence trough and the center of the inlet docking hole of the flow diversion channel on the outflow confluence trough to obtain the center line of the flow diversion channel; S11002. With the center line of the diverter channel as the center, a diverter channel is opened between the inflow confluence groove and the outflow confluence groove in the bottom flange, the side of the diverter channel close to the inflow confluence groove is the outlet of the diverter channel, the side of the diverter channel close to the outflow confluence groove is the inlet of the diverter channel, the shape of the cross section of the diverter channel is the same as the cross section of the inflow confluence groove and the outflow confluence groove, and the size of the cross section of the diverter channel is the same as the size of the diverter channel inlet docking hole on the inflow confluence groove and the diverter channel outlet docking hole on the outflow confluence groove; The cross section refers to a section perpendicular to the flow direction of the cooling medium in the branch channel.

7. The high-efficiency heat transfer active cooling method for a sharp leading edge air inlet according to claim 6, characterized in that: S111 connects the cooling medium inlet, the inflow confluence groove, the inflow channel, the sharp front edge cooling channel, the outflow channel, the outflow confluence groove, the diversion channel and the cooling medium outlet to form a cooling medium channel, specifically: S11101, the input end of the cooling medium inlet is connected to the cooling medium input pipeline, and the output end of the cooling medium inlet is connected to the inflow confluence groove through the cooling medium inlet output end docking hole on the inflow confluence groove; S11102, the inlet of the inflow channel is connected to the inflow converging groove through the inflow channel inlet docking hole on the inflow converging groove corresponding to the inflow channel inlet, and the outlet of the inflow channel is connected to the sharp leading edge cooling channel through the inflow channel outlet docking hole on the sharp leading edge cooling channel corresponding to the inflow channel outlet; S11103, the sharp leading edge cooling channel is connected with the outflow channel through the outflow channel inlet docking hole on the sharp leading edge cooling channel corresponding to the outflow channel inlet; S11104, the outflow channel outlet is connected with the outflow confluence groove through the outflow channel outlet docking hole on the outflow confluence groove corresponding to the outflow channel outlet; S11105, the input end of the cooling medium outlet is connected to the outflow confluence groove through the cooling medium outlet input end docking hole of the outflow confluence groove, and the output end of the cooling medium outlet is connected to other equipment outside the sharp leading edge air inlet duct; S11106. The inlet of the diversion channel is connected with the inflow confluence groove through the diversion channel inlet docking hole of the inflow confluence groove, and the outlet of the diversion channel is connected with the outflow confluence groove through the diversion channel outlet docking hole of the outflow confluence groove.

8. The high-efficiency heat transfer active cooling method for a sharp leading edge air inlet according to claim 7, characterized in that: The cross-sectional areas of the cooling medium channels described in step S111 are equal.

9. A high-efficiency heat transfer active cooling method for a sharp leading edge air inlet according to claim 8, characterized in that: The cooling medium channel described in step S111 is formed by 3D printing.

10. A high-efficiency heat transfer active cooling method for a sharp leading edge air inlet according to claim 9, characterized in that: The method for determining the spacing between the inflow channel and the outflow channel arranged at equal intervals includes: S1501. Take 40% of the inner flow channel area as the total bottom area of ​​the inflow channel and the outflow channel; S1502, obtaining the bottom area of ​​each inflow channel and outflow channel according to the length and width of the rectangular bottom of the inflow channel and the length and width of the rectangular bottom of the outflow channel, and then calculating the number of the inflow channels and outflow channels according to the total bottom area of ​​the inflow channels and outflow channels; S1503, according to the ellipse C 2, the number of inflow channels and outflow channels, and calculate the number of inflow channels in the ellipse. C 2 Uniformly distributed spacing on the circumference and outflow channels on the ellipse C 3. Uniformly distributed spacing on the circumference; The bottom surface refers to the surface of the inner flow channel of the inlet channel close to the sharp leading edge in the inlet channel and the outflow channel.

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