A rotating detonation combustion chamber detonation wave propagation direction induced intake pre-whirl structure

Abstract

The application relates to the technical field of aero-engines, and provides a rotating detonation combustion chamber detonation wave propagation direction induced air intake pre-rotation structure which comprises an air intake shell, an air intake flow channel is arranged in the air intake shell, the air intake flow channel comprises an air intake passage, a connecting passage, an expansion passage and a backflow passage, one end of the air intake passage is used for introducing air and fuel, the other end is communicated with the connecting passage, the small end of the expansion passage is communicated with one end of the connecting passage away from the air intake passage, and the large end of the expansion passage is communicated with a combustion chamber; the inlet end of the backflow passage is communicated with one end of the connecting passage away from the expansion passage, and the outlet end of the backflow passage is communicated with the air intake passage; a plurality of guide vanes are arranged in the expansion passage and are arranged in a circumferential interval, and a pre-rotation passage for pre-rotating gas is formed between two adjacent guide vanes. The rotating detonation combustion chamber detonation wave propagation direction induced air intake pre-rotation structure can improve the control accuracy of the detonation wave mode in the combustion chamber.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of aero-engines, and particularly relates to a rotating detonation combustion chamber detonation wave propagation direction induced air intake pre-rotation structure. BACKGROUND

[0002] The rotating detonation combustion chamber is a new type of combustion technology, and its basic principle is to use the rotating motion of detonation waves in the combustion chamber to realize a high-efficiency and rapid combustion process. In the rotating detonation combustion chamber, fuel and oxidizer are injected into a special combustion chamber, which has a certain shape and structure and can induce the formation and propagation of detonation waves. When the detonation wave rotates in the combustion chamber, it will rapidly mix and ignite the fuel and oxidizer, thereby releasing a large amount of energy. This technology has the advantages of fast combustion speed, high combustion efficiency, and low emissions. The rotating detonation combustion chamber, as a new type of high-efficiency propulsion technology, uses continuous detonation waves to generate thrust, and therefore has a wide application prospect in the fields of aerospace, energy, etc.

[0003] REFERENCE Figure 1 In the prior art, the air intake end of the rotating detonation combustion chamber 2 (hereinafter referred to as the combustion chamber 2) includes an inner ring wall 21 and an outer ring wall 22 coaxially sleeved, the inner ring wall 21 and the outer ring wall 22 are arranged at intervals and form an air intake flow channel 11 for fuel and air to enter the combustion chamber 2, the air intake flow channel 11 includes a straight passage 115 and an expansion passage 113 which are in communication with each other, one end of the straight passage 115 away from the expansion passage 113 is in communication with the air intake end, and one end of the expansion passage 113 away from the straight passage 115 is in communication with the combustion chamber 2, that is, a converging-diverging air intake scheme. In order to control the mode of the detonation wave, a complex combustion chamber 2 structure design or an external control system is usually used. Although these methods can achieve mode control to a certain extent, they increase the complexity and cost of the system, and therefore need to be further optimized. SUMMARY

[0004] In order to improve the control accuracy of the mode of the detonation wave in the combustion chamber, the present application provides a rotating detonation combustion chamber detonation wave propagation direction induced air intake pre-rotation structure.

[0005] The rotating detonation combustion chamber detonation wave propagation direction induced air intake pre-rotation structure provided by the present application adopts the following technical scheme:

[0006] The application discloses a kind of pre-rotation structure of intake air for the propagation direction of rotating detonation combustion chamber detonation wave, including the intake shell of combustion chamber entrance, intake shell is opened with intake flow channel, intake flow channel includes intake passage, connecting channel, expansion passage and reflux passage, one end of intake passage is used to pass into air and fuel, the other end is communicated with connecting channel, the small end of expansion passage is communicated with the end of connecting channel away from intake passage, the large end of expansion passage is communicated with combustion chamber;The import end of reflux passage is communicated with the end of connecting channel away from expansion passage, and the outlet end of reflux passage is communicated with intake passage;Expansion passage is provided with a plurality of guide vanes arranged in a circumferential direction, and a pre-rotation passage for pre-rotating gas is formed between adjacent two guide vanes.

[0007] By adopting the technical scheme, the intake shell, intake flow channel and guide vanes are arranged, a pre-rotation passage is formed between adjacent two guide vanes, a plurality of guide vanes are arranged in a circumferential direction, a plurality of pre-rotation passages for pre-rotating gas are formed, gas (air and fuel) is sequentially introduced into the combustion chamber through the intake flow channel and the pre-rotation passage, and the gas is rotated after being guided by the guide vanes, that is, the pre-rotation of the explosive mixture formed by combining air and fuel is performed, so that the explosive mixture is rotated into the combustion chamber, the rotation of the gas into the combustion chamber helps to form an orderly airflow structure, improves the mixing effect of fuel and air, and makes the detonation wave propagate in the combustion chamber in a more stable manner, which is beneficial to the mode control of the detonation wave.

[0008] The intake passage, connecting channel, expansion passage and reflux passage are combined to form a "Tesla valve" structure, the characteristics of one-way flow of the Tesla valve are utilized to separate the forward channel of gas into the combustion chamber from the reverse channel of pressure return and combustion product return, effectively reducing the hindrance of pressure return and combustion product return to the forward entering gas, so that the detonation supercharging can compensate for the total pressure loss generated by the intake, thereby improving the total pressure gain of the rotating detonation combustion chamber;In addition, a plurality of guide vanes are arranged in the expansion passage and arranged in a circumferential direction, which has a certain hindering effect on pressure return and combustion product return, and reduces the total pressure loss of the combustion chamber.

[0009] Optionally, the reflux passage includes a straight section and an arc section, the straight section and the connecting channel are linearly communicated, the expansion passage and the connecting channel are linearly communicated, one end of the arc section is communicated with the end of the straight section away from the connecting channel, and the other end is communicated with the intake passage, and the included angle between the intake passage and the straight section is an acute angle.

[0010] By adopting the technical scheme, in the process of the gas entering the combustion chamber in the positive direction, the gas sequentially passes through the air inlet channel, the connecting channel and the expansion channel to enter the combustion chamber, when the pressure wave and / or the combustion product generated in the combustion chamber is transmitted back, the pressure wave and / or the combustion product sequentially passes through the expansion channel, the connecting channel, the straight section and the arc section, the straight section and the arc section form the arc-shaped backflow channel, the pressure wave and / or the combustion product is transmitted back through the arc-shaped backflow channel, and the arc-shaped backflow channel weakens the pressure wave and / or the combustion product transmitted back. Since the pressure wave and the combustion product backflow channel and the air and fuel positive entry channel are two channels, the influence of the pressure wave and / or the combustion product transmission back on the air and fuel positive entry is small, thereby reducing the total pressure loss of the air inlet and improving the total pressure gain of the rotary detonation combustion chamber.

[0011] Optionally, the air inlet shell is provided with an inner cylinder and an outer cylinder coaxially arranged near the side wall of the combustion chamber, the outer peripheral wall of the inner cylinder and the inner peripheral wall of the outer cylinder are spaced apart to form a connecting channel, one end of the connecting channel is communicated with the large end of the expansion channel, and the other end is communicated with the combustion chamber, and the expansion channel is communicated with the combustion chamber through the connecting channel; and the connecting channel is provided with an adjusting mechanism for adjusting the gas pre-rotation angle.

[0012] By adopting the technical scheme, the gas pre-rotation angle is adjusted through the adjusting mechanism according to the structure and shape of the combustion chamber, that is, the gas pre-rotation angle is controlled, the gas entry direction into the combustion chamber is controlled, the mixing effect of the fuel and the air is improved, the rotation direction of the airflow is controlled, and the geometric shape of the combustion chamber is cooperated to help form a stable detonation wave mode, so as to accurately control the detonation wave mode in the combustion chamber.

[0013] Optionally, the adjusting mechanism comprises an adjusting piece and an adjusting assembly, the adjusting piece is arranged in the connecting channel and is spaced apart in the circumferential direction of the inner cylinder, a plurality of adjusting pieces are arranged corresponding to a plurality of guide vanes, one side of each adjusting piece is hinged to the side of the corresponding guide vane close to the connecting channel, and an adjusting channel is formed between the two adjacent adjusting pieces; and the adjusting assembly is arranged on the outer cylinder and is used for driving the free ends of all adjusting pieces to synchronously flip.

[0014] By adopting the technical scheme, the adjusting channel is formed by the combination of the two adjacent adjusting pieces, the plurality of adjusting channels are formed by the combination of the plurality of adjusting pieces, and the plurality of adjusting channels are arranged corresponding to the plurality of pre-rotation channels; the free ends of all adjusting pieces are driven by the adjusting assembly to synchronously flip, so as to change the inclination angle of the adjusting piece, form a certain included angle between the pre-rotation channel and the adjusting channel, and then change the pre-rotation angle of the gas after the gas sequentially passes through the pre-rotation channel and the adjusting channel.

[0015] Optionally, one end of the adjusting piece is provided with a rotating shaft, the rotating shaft is rotationally connected to the guide vane, and one side of the adjusting piece is hingedly connected to the corresponding guide vane through the rotating shaft; the end face of the outer cylinder close to the combustion chamber is provided with a rotating groove, the free side of each adjusting piece is provided with an adjusting rod, and one end of the adjusting rod penetrates into the rotating groove; the adjusting assembly comprises an adjusting ring, a rotating piece and a limiting piece, the adjusting ring is rotationally installed in the rotating groove, when the adjusting ring rotates around the central axis thereof, the adjusting ring drives all the adjusting pieces to synchronously overturn through the adjusting rods, the rotating piece is detachably arranged on the outer cylinder to drive the adjusting ring to rotate, and the limiting piece is arranged on the outer cylinder to limit the free rotation of the adjusting ring.

[0016] By adopting the above technical scheme, through the arrangement of the adjusting ring, the rotating piece and the limiting piece, the free end of each adjusting piece penetrates into the rotating groove through the adjusting rod and is connected to the adjusting ring, when the pre-rotation angle of the gas is adjusted, the rotating piece drives the adjusting ring to rotate, the adjusting ring can drive the free end of all the adjusting pieces to rotate around the corresponding rotating shaft, so that the direction of the adjusting channel is changed to adjust the pre-rotation angle of the gas; after the adjustment is completed, the limiting piece limits the free rotation of the adjusting ring to keep the position of the adjusting piece, so that the gas can cut into the combustion chamber through a specific pre-rotation angle.

[0017] Optionally, a plurality of first penetrating grooves are arranged on the inner wall of the outer cylinder and communicated with the rotating grooves, the plurality of first penetrating grooves are arranged in correspondence with the plurality of adjusting pieces, each first penetrating groove is arranged in an arc shape around the central axis of the rotating shaft, so as to allow the adjusting rod corresponding to the adjusting piece to extend into the rotating groove; the adjusting ring is provided with a plurality of second penetrating grooves, the plurality of second penetrating grooves are arranged in correspondence with the plurality of adjusting pieces, and the two ends of each second penetrating groove are arranged in an axial direction of the outer cylinder, so as to allow the adjusting rod corresponding to the adjusting piece to be inserted, when the adjusting ring rotates around the central axis thereof, the adjusting ring pushes the adjusting rod through the inner wall of the second penetrating groove, so as to force the adjusting rod to displace along the arc of the first penetrating groove.

[0018] By adopting the above technical scheme, through the arrangement of the first penetrating groove and the second penetrating groove, the first penetrating groove is arranged in an arc shape, so that the free end of the adjusting piece can rotate around the central axis of the rotating shaft; one end of the adjusting rod of the adjusting piece is inserted into the second penetrating groove, so that the adjusting rod is connected to the adjusting ring, when the adjusting ring rotates, the adjusting ring can push the adjusting rod through the inner wall of the second penetrating groove, so as to force the adjusting rod to rotate around the central axis of the rotating shaft, thereby improving the convenience of adjusting the pre-rotation angle of the gas.

[0019] Optionally, the rotating member comprises a mounting base, a butt joint plate and a rotating plate, the butt joint plate and the rotating plate are respectively rotatably installed at two ends of the mounting base, a butt joint rod is arranged on a side wall of the butt joint plate away from the mounting base, and a butt joint hole is arranged on a side wall of the adjusting ring and used for inserting the butt joint rod; a mounting groove is arranged on a side wall of the mounting base close to the butt joint plate, the rotating plate is coaxially connected with a rotating rod, one end of the rotating rod away from the rotating plate extends into the mounting groove and is coaxially connected with a rotating gear, the butt joint plate is coaxially connected with a rotating gear ring on a side wall close to the mounting groove, and the rotating gear and the rotating gear ring are in mesh transmission.

[0020] By adopting the technical scheme, when the gas pre-rotation angle is adjusted, the air inlet shell is detached from the combustion chamber, the butt joint rod of the butt joint plate is inserted into the butt joint hole, the butt joint plate and the adjusting ring are connected through the butt joint rod, the rotating plate is rotated, the adjusting ring is driven to rotate under the action of the rotating gear and the rotating gear ring, the free ends of all the adjusting fins are synchronously flipped, and the convenience of adjusting the direction of the adjusting channel is improved.

[0021] Optionally, a plurality of transition gear sets are arranged in the mounting groove, and the plurality of transition gear sets are arranged at intervals around the central axis of the rotating rod; each transition gear set comprises a plurality of transition gears rotatably installed on the inner wall of the mounting groove, the diameters of the plurality of transition gears gradually increase from the side close to the center of the mounting groove to the side away from the center of the mounting groove, and adjacent two transition gears are in mesh transmission; the rotating gear is in mesh transmission with the transition gear with the smallest diameter, the rotating gear ring is in mesh transmission with the transition gear with the largest diameter, and the rotating gear and the rotating gear ring are in mesh transmission through the plurality of transition gear sets.

[0022] By adopting the technical scheme, when the rotating plate is rotated, the butt joint plate can be driven to rotate through the plurality of transition gears; the diameters of the plurality of transition gears gradually increase from the side close to the center of the mounting groove to the side away from the center of the mounting groove, so that when the rotating plate is controlled to rotate by a certain angle, the rotating angle of the butt joint plate is much smaller than the rotating angle of the rotating plate, thereby the flipping angle of the adjusting fin can be finely adjusted, and the accuracy of adjusting the gas pre-rotation angle is improved.

[0023] Optionally, the limiting member comprises a limiting rod and a limiting spring, the limiting rod is slidably installed in the rotating groove, the limiting spring is installed between the limiting rod and the inner wall of the rotating groove, and the limiting spring normally forces the limiting rod to be inserted into the butt joint hole of the adjusting ring to limit the free rotation of the adjusting ring; a plurality of butt joint holes are arranged around the central axis of the adjusting ring, and when the butt joint rod of the butt joint plate is inserted into the butt joint hole, the butt joint rod forces the limiting rod to be separated from the butt joint hole.

[0024] By adopting the technical scheme, the limiting rod is inserted into the butt joint hole of the adjusting ring under the action of the limiting spring, so that the free rotation of the adjusting ring is limited, that is, the overturning angle of the adjusting piece is fixed; when it is necessary to adjust the pre-rotation angle of the gas, the butt joint rod of the butt joint plate is inserted into the butt joint hole of the adjusting ring, the butt joint rod can extrude the limiting rod out of the butt joint hole, so that the limiting effect on the adjusting ring is released, at this time, the adjusting ring can be rotated to adjust the overturning angle of the adjusting piece, and the operation convenience of the overall structure is improved.

[0025] Optionally, the surface of the adjusting piece is provided with a rotation channel, two adjacent adjusting channels are connected with each other through the rotation channel, and the two ends of the rotation channel are respectively directed to the outlet ends of the two adjacent adjusting channels; the adjusting piece is provided with an opening and closing member for opening and closing the rotation channel, when the gas flows from the inlet end of the adjusting channel to the outlet end of the adjusting channel, the opening and closing member closes the rotation channel, and when the pressure of the combustion chamber is returned and the combustion products are returned, the opening and closing member opens the rotation channel.

[0026] By adopting the technical scheme, when the pressure wave and / or combustion products generated in the combustion chamber are returned, the opening and closing member opens the rotation channel at this time, and after the returned pressure wave and / or combustion products enter the adjusting channel, part of the pressure wave and / or combustion products enter the adjacent adjusting channel through the rotation channel and collide with the pressure wave and / or combustion products in the adjacent adjusting channel, so that the pressure wave and / or combustion products in the adjacent adjusting channel are weakened, forming a first weakening. After the pressure wave and / or combustion products are returned to the inlet flow channel, the inlet flow channel of the "Tesla valve" structure forms a second weakening to the returned pressure wave and / or combustion products, so that the returned pressure wave and / or combustion products have little influence on the forward entering of air and fuel, thereby reducing the total pressure loss of the inlet and improving the total pressure gain of the rotary detonation combustion chamber.

[0027] In summary, the present application has at least one of the following beneficial technical effects:

[0028] 1. By the setting of the intake shell, the intake flow channel and the guide vane, the pre-rotation channel is formed between the adjacent two guide vanes, and the plurality of guide vanes are arranged in a circumferential direction to form a plurality of pre-rotation channels for pre-rotating the gas; the gas (air and fuel) enters the combustion chamber in sequence through the intake flow channel and the pre-rotation channel, and the gas will rotate after being guided by the guide vane, that is, the pre-rotation is performed on the explosive mixture formed by the combination of air and fuel, so that the explosive mixture rotates into the combustion chamber, the rotation of the gas into the combustion chamber helps to form an orderly airflow structure, improves the mixing effect of the fuel and air, makes the detonation wave propagate in the combustion chamber in a more stable manner, and is beneficial to the mode control of the detonation wave; the intake channel, the connecting channel, the expansion channel and the backflow channel are combined to form a "Tesla valve" structure, the characteristics of one-way flow of the Tesla valve are used to separate the forward channel of the gas entering the combustion chamber from the reverse channel of the pressure return and the combustion product return, effectively reducing the hindrance of the pressure return and the combustion product return to the gas entering in the forward direction, so that the detonation supercharging can compensate for the total pressure loss generated by the intake, thereby improving the total pressure gain of the rotary detonation combustion chamber; in addition, the plurality of guide vanes are arranged in the expansion channel and are arranged in a circumferential direction, and have a certain hindering effect on the pressure return and the combustion product return, thereby reducing the total pressure loss of the combustion chamber.

[0029] 2. By the setting of the adjusting ring, the rotating member and the limiting member, the free end of each adjusting piece passes through the adjusting rod into the rotating groove and is connected to the adjusting ring, when the pre-rotation angle of the gas is adjusted, the adjusting ring is driven to rotate by the rotating member, and the adjusting ring can drive the free end of all adjusting pieces to rotate around the corresponding rotating shaft, thereby changing the direction of the adjusting channel to adjust the pre-rotation angle of the gas; after the adjustment is completed, the adjusting ring is limited by the limiting member to limit the free rotation of the adjusting ring, so as to keep the position of the adjusting piece, so that the gas can cut into the combustion chamber through a specific pre-rotation angle.

[0030] 3. By the setting of the back rotation channel, when the pressure wave and / or combustion product in the combustion chamber is returned, the opening and closing member opens the back rotation channel at this time, and the returned pressure wave and / or combustion product enters the adjusting channel, part of the pressure wave and / or combustion product enters the adjacent adjusting channel through the back rotation channel, and collides with the pressure wave and / or combustion product in the adjacent adjusting channel, thereby weakening the pressure wave and / or combustion product in the adjacent adjusting channel, forming a first level of weakening. After the pressure wave and / or combustion product is returned to the intake flow channel, the intake flow channel of the "Tesla valve" structure forms a second level of weakening to the returned pressure wave and / or combustion product, so that the returned pressure wave and / or combustion product has little effect on the forward entering of air and fuel, thereby reducing the total pressure loss of the intake and improving the total pressure gain of the rotary detonation combustion chamber. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 is a partial sectional view of the intake flow channel in the background art;

[0032] Figure 2 is an overall structural sectional view of Example 1;

[0033] Figure 3 is a structural schematic view of the guide vane of Example 1;

[0034] Figure 4 is a structural schematic view of the adjustment mechanism of Example 2;

[0035] Figure 5 is a structural schematic view of the adjustment piece of Example 2;

[0036] Figure 6 is a structural schematic view of the first and second cutting faces of Example 2;

[0037] Figure 7 is a structural schematic view of the adjustment channel of Example 2;

[0038] Figure 8 is a structural schematic view of the second through slot of Example 2;

[0039] Figure 9 is an exploded schematic view of the transition tooth set of Example 2;

[0040] Figure 10 is a structural schematic view of the transition tooth gear of Example 2;

[0041] Figure 11 is a partial sectional view of the limit member of Example 2;

[0042] Figure 12 is a partial sectional view of the swivel channel of Example 3.

[0043] Explanation of reference signs: 1, air inlet shell; 11, air inlet channel; 111, air inlet passage; 112, connecting passage; 113, expansion passage; 114, backflow passage; 1141, straight section; 1142, arc section; 115, straight passage; 12, guide vane; 121, pre-rotation passage; 13, inner cylinder; 131, second cutting surface; 14, outer cylinder; 141, rotating groove; 142, first through groove; 143, first cutting surface; 15, connecting passage; 151, mounting area; 16, first main body part; 17, second main body part; 18, flow guiding part; 2, combustion chamber; 21, inner ring wall; 22, outer ring wall; 3, adjusting mechanism; 31, adjusting piece; 311, adjusting passage; 312, rotating shaft; 313, adjusting rod; 314, rotating passage; 315, meeting surface; 316, turning groove; 317, turning piece; 32, adjusting ring; 321, second through groove; 3211, pushing surface; 3212, limiting surface; 322, butt joint hole; 33, mounting seat; 331, mounting groove; 34, butt joint plate; 341, butt joint rod; 342, rotating gear ring; 343, butt joint ring; 35, rotating plate; 351, rotating rod; 352, rotating gear; 36, limiting rod; 37, limiting spring; 4, transition gear set; 41, transition gear. DETAILED DESCRIPTION

[0044] The following description will be made in conjunction with the accompanying drawings. Figure 1 - the accompanying drawings Figure 12 The present application is further described in detail.

[0045] Reference will be made to Figure 1 The air inlet end of the rotating detonation combustion chamber 2 (hereinafter referred to as the combustion chamber 2) in the related art includes an inner ring wall 21 and an outer ring wall 22 coaxially sleeved, the inner ring wall 21 and the outer ring wall 22 are arranged at intervals and form an air inlet channel 11 for fuel and air to enter the combustion chamber 2, the air inlet channel 11 includes a straight passage 115 and an expansion passage 113 which are in communication with each other, one end of the straight passage 115 away from the expansion passage 113 is in communication with the air inlet end, and one end of the expansion passage 113 away from the straight passage 115 is in communication with the combustion chamber 2, that is, a converging-diverging air inlet scheme.

[0046] The detonation wave is a chemical reaction zone caused by a shock wave rotating at a high speed around the combustion chamber 2 in the circumferential direction, the pressure at the position of the detonation wave is very high, and each time the detonation wave rotates to a position, pressure backflow occurs, which causes the air inlet end of the combustion chamber 2 to be blocked, the pressure decays slowly after the air inlet is blocked, resulting in a long air inlet recovery time, and when the detonation wave rotates back to the original position, fresh air and fuel required for the reaction have not had time to supplement into the combustion chamber 2, resulting in the detonation wave being extinguished.

[0047] The converging-diverging intake scheme is essentially a supersonic intake scheme, and a normal shock wave is formed in the diverging channel 113, which can block the pressure return of the detonation wave, and the Mach number of the supersonic intake is high, which can quickly supplement fresh air and fuel required for reaction, solving the problem of slow intake recovery time. In order to control the mode of the detonation wave, a complex combustion chamber 2 structure design or external control system is usually used, which can achieve mode control to some extent, but increases the complexity and cost of the system.

[0048] Embodiment 1:

[0049] The embodiment of the present application discloses a rotating detonation combustion chamber detonation wave propagation direction induced intake pre-rotation structure.

[0050] With reference to Figure 2 A rotating detonation combustion chamber detonation wave propagation direction induced intake pre-rotation structure, comprising an intake shell 1 installed at the inlet of the combustion chamber 2, which can be connected and fixed between the intake shell 1 and the outer wall of the combustion chamber 2 in the form of clamping assembly, or connected and fixed in the form of bolt connection; an intake flow channel 11 is opened in the intake shell 1, and the inlet end of the intake flow channel 11 is used for passing in gas (air and fuel), and the outlet end of the intake flow channel 11 is communicated with the inside of the combustion chamber 2.

[0051] With reference to Figure 2 The intake flow channel 11 comprises an intake passage 111, a connecting passage 112, a diverging channel 113 and a backflow passage 114, the intake passage 111 is the inlet end of the intake flow channel 11, that is, one end of the intake passage 111 is used for passing in air and fuel, and the other end of the intake passage 111 is communicated with the connecting passage 112; the small end of the diverging channel 113 is communicated with the end of the connecting passage 112 away from the intake passage 111, and the large end of the diverging channel 113 is communicated with the combustion chamber 2; the backflow passage 114 comprises a straight section 1141 and an arc section 1142, the straight section 1141 and the connecting passage 112 are linearly communicated and arranged, the arc section 1142 is communicated at one end with the end of the straight section 1141 away from the connecting passage 112, and at the other end with the intake passage 111, and the included angle between the intake passage 111 and the straight section 1141 is 30°-45°.

[0052] In this way, by using the one-way flow characteristics of the "Tesla valve", the positive channel of air and fuel into the combustion chamber 2 is separated from the reverse channel of pressure return and combustion product return, effectively reducing the obstruction of pressure return and combustion product return to the positively entering air and fuel, so that the detonation supercharging can compensate for the total pressure loss generated by the intake, thereby improving the total pressure gain of the combustion chamber 2; at the same time, the high temperature of the combustion product return is avoided to ignite the reactants in advance, thereby reducing the influence of the combustion product return on the combustion chamber 2.

[0053] Referring to Figure 2 In the embodiment, the intake passage 111 and the return passage 114 divide the intake casing 1 to form the first main body part 16, the second main body part 17 and the flow guide part 18, the flow guide part 18 is located between the intake passage 111 and the return passage 114, a first connecting column (not shown in the figure) located in the intake passage 111 is installed between the first main body part 16 and the flow guide part 18, two ends of the first connecting column are fixed to the first main body part 16 and the flow guide part 18 respectively, a second connecting column (not shown in the figure) located in the return passage 114 is installed between the second main body part 17 and the flow guide part 18, two ends of the second connecting column are fixed to the second main body part 17 and the flow guide part 18 respectively; in this way, the first connecting column and the second connecting column are arranged to connect the first main body part 16, the second main body part 17 and the flow guide part 18 as a whole.

[0054] Referring to Figure 2 , Figure 3 In the embodiment, a plurality of guide vanes 12 are installed in the expansion passage 113, the plurality of guide vanes 12 are arranged in a circumferential interval around the central axis of the intake casing 1, and each guide vane 12 extends to the connecting passage 112 away from the combustion chamber 2; a pre-rotation passage 121 for pre-rotating the gas is formed between two adjacent guide vanes 12, and the plurality of guide vanes 12 divide the expansion passage 113 to form a plurality of pre-rotation passages 121.

[0055] The implementation principle of the embodiment 1 is that the plurality of guide vanes 12 are arranged in a circumferential direction to form a plurality of pre-rotation passages 121 for pre-rotating the gas; the gas passes into the combustion chamber 2 through the intake flow passage 11 and the pre-rotation passage 121 in sequence, and the gas will rotate after being guided by the guide vanes 12, that is, the pre-rotation of the explosive mixture formed by the combination of air and fuel is performed, so that the explosive mixture rotates into the combustion chamber 2, the rotation of the gas into the combustion chamber 2 helps to form an orderly airflow structure, improves the mixing effect of the fuel and the air, makes the detonation wave propagate in the combustion chamber 2 in a more stable manner, and is beneficial to the mode control of the detonation wave.

[0056] In the process of the gas entering the combustion chamber 2 in the positive direction, the gas enters the combustion chamber 2 in sequence through the air inlet channel 111, the connecting channel 112 and the expansion channel 113. When the pressure wave and / or the combustion products generated in the combustion chamber 2 are returned, the pressure wave and / or the combustion products pass through the expansion channel 113, the connecting channel 112, the straight section 1141 and the arc section 1142 in sequence. The straight section 1141 and the arc section 1142 constitute the arc-shaped return flow channel 114. The pressure wave and / or the combustion products return through the arc-shaped return flow channel 114 and are weakened by the arc-shaped return flow channel 114. Since the pressure wave and combustion product return channel and the air and fuel positive entry channel are two channels, the return of the pressure wave and / or the combustion products has little effect on the positive entry of the air and fuel. In addition, a plurality of guide vanes 12 are arranged in the expansion channel 113 and are arranged in a circumferential interval. The guide vanes 12 and the air inlet channel 11 can reduce the total pressure loss and improve the total pressure gain of the rotary detonation combustion chamber 2.

[0057] Embodiment 2:

[0058] The embodiment of the application discloses a rotary detonation combustion chamber detonation wave propagation direction induced air pre-rotation structure.

[0059] With reference to Figure 4 , Figure 5 The rotary detonation combustion chamber detonation wave propagation direction induced air pre-rotation structure disclosed by the embodiment of the application is different from that of Embodiment 1 in that:

[0060] In the embodiment, the inner cylinder 13 and the outer cylinder 14 are respectively arranged on the side wall of the air inlet shell 1 close to the combustion chamber 2. The inner cylinder 13 and the outer cylinder 14 are coaxially arranged. The outer cylinder 14 is arranged on the outer circumferential side of the inner cylinder 13. The outer circumferential wall of the inner cylinder 13 and the inner circumferential wall of the outer cylinder 14 are arranged at intervals and form the connecting channel 15. One end of the connecting channel 15 is connected to the large end of the expansion channel 113, and the other end is connected to the combustion chamber 2. The expansion channel 113 is connected to the combustion chamber 2 through the connecting channel 15.

[0061] With reference to Figure 5 , Figure 6 In the embodiment, the inner circumferential wall of the outer cylinder 14 is provided with a plurality of first cutting surfaces 143. The plurality of first cutting surfaces 143 are arranged in a circumferential direction around the central axis of the outer cylinder 14. The outer circumferential wall of the inner cylinder 13 is provided with a plurality of second cutting surfaces 131. The plurality of second cutting surfaces 131 are arranged in a circumferential direction around the central axis of the inner cylinder 13. The plurality of first cutting surfaces 143 and the plurality of second cutting surfaces 131 are arranged one by one in correspondence. The first cutting surface 143 and the corresponding second cutting surface 131 form the mounting area 151. The plurality of first cutting surfaces 143 and the plurality of second cutting surfaces 131 form a plurality of mounting areas 151 for the connecting channel 15. The plurality of mounting areas 151 are arranged in correspondence with the plurality of guide vanes 12.

[0062] Referring to Figure 5 , Figure 6 , Figure 7 , the adjusting mechanism 3 for adjusting the gas pre-rotation angle is installed in the connecting channel 15, the adjusting mechanism 3 comprises adjusting pieces 31 and an adjusting assembly, the number of the adjusting pieces 31 corresponds to the number of the installation areas 151 (i.e. the number of the adjusting pieces 31 corresponds to the number of the guide vanes 12), each adjusting piece 31 is installed in the corresponding installation area 151, one side of each adjusting piece 31 is provided with a rotating shaft 312, the rotating shaft 312 is rotationally connected to the corresponding guide vane 12, one side of the adjusting piece 31 is hinged to one side of the corresponding guide vane 12 close to the connecting channel 15 through the rotating shaft 312, and the adjusting channel 311 is formed between the two adjacent adjusting pieces 31.

[0063] Referring to Figure 6 , Figure 7 , the end face of the outer cylinder 14 close to the combustion chamber 2 is provided with a rotating groove 141, the rotating groove 141 is annularly arranged around the central axis of the outer cylinder 14, for the convenience of description, the side of the adjusting piece 31 away from the rotating shaft 312 is defined as the free side of the adjusting piece 31, the free side of the adjusting piece 31 is fixed with an adjusting rod 313, the axial direction of the adjusting rod 313 is parallel to the axial direction of the rotating shaft 312; each first cutting surface 143 of the outer cylinder 14 is provided with a first through groove 142 communicating with the rotating groove 141, the first through groove 142 is arcuately arranged around the central axis of the corresponding rotating shaft 312, so as to be used for the adjusting rod 313 of the corresponding adjusting piece 31 to extend into the rotating groove 141.

[0064] Referring to Figure 4 , Figure 7 , Figure 8 , the adjusting assembly is arranged on the outer cylinder 14 for driving the free ends of all the adjusting pieces 31 to synchronously overturn, the adjusting assembly comprises an adjusting ring 32, a rotating member and a limiting member, the adjusting ring 32 is annularly structured, the adjusting ring 32 is rotationally installed in the rotating groove 141 so as to be able to rotate around the central axis thereof, the outer peripheral wall of the adjusting ring 32 is provided with a plurality of second through grooves 321, the plurality of second through grooves 321 all penetrate the inner peripheral wall of the adjusting ring 32, the plurality of second through grooves 321 correspond to the plurality of adjusting pieces 31, the two ends of each second through groove 321 are arranged in the axial direction of the outer cylinder 14, so as to be used for the adjusting rod 313 of the corresponding adjusting piece 31 to be inserted; when the adjusting ring 32 rotates around the central axis thereof, the adjusting ring 32 pushes the adjusting rod 313 through the inner wall of the second through groove 321, so as to force the adjusting rod 313 to displace along the arc of the first through groove 142, thereby driving all the adjusting pieces 31 to synchronously overturn.

[0065] Referring to Figure 7 , Figure 8It should be noted that the two opposite inner walls of the second through groove 321 in the width direction form a pushing surface 3211 and a limiting surface 3212 respectively, the pushing surface 3211 is used to push the adjusting rod 313 to displace, that is, when the adjusting ring 32 rotates, the adjusting rod 313 is pushed by the pushing surface 3211 to drive the free end of the adjusting sheet 31 to overturn, so as to adjust the direction of the adjusting channel 311. The limiting surface 3212 is used to limit the maximum displacement range of the adjusting rod 313, the distance between the pushing surface 3211 and the limiting surface 3212 is greater than the outer diameter of the adjusting rod 313; in this way, during the intake stage, the gas acts on the adjusting sheet 31, so that the peripheral wall of the adjusting rod 313 can abut against the pushing surface 3211, at this time the direction of the adjusting channel 311 remains constant under the action of the pushing surface 3211, when the pressure wave and / or combustion products generated in the combustion chamber 2 are back, the pressure wave and / or combustion products generated in the combustion chamber 2 have a pushing effect on the adjusting sheet 31, which can drive the free end of the adjusting sheet 31 to swing, forcing the adjusting rod 313 to displace to the limiting surface 3212, thereby increasing the contact area of the adjusting sheet 31 with the pressure wave and / or combustion products, and improving the blocking effect of the pressure wave and / or combustion products.

[0066] With reference to Figure 4 , Figure 9 , the rotating member is detachably arranged on the outer cylinder 14 to drive the adjusting ring 32 to rotate, and the rotating member comprises a mounting seat 33, a butt joint plate 34 and a rotating plate 35. The butt joint plate 34 and the rotating plate 35 are rotatably arranged at two ends of the mounting seat 33, and the butt joint plate 34 and the rotating plate 35 are coaxially arranged. A plurality of butt joint rods 341 are fixedly arranged on the side wall of the butt joint plate 34 away from the mounting seat 33, and the plurality of butt joint rods 341 are arranged at intervals around the central axis of the butt joint plate 34. A plurality of butt joint holes 322 are arranged on the side wall of the adjusting ring 32, and the plurality of butt joint holes 322 are arranged at intervals around the central axis of the adjusting ring 32. The butt joint holes 322 are used for matching the butt joint rods 341 to be inserted. When the butt joint rods 341 are inserted into the butt joint holes 322, the butt joint plate 34 can drive the adjusting ring 32 to rotate.

[0067] With reference to Figure 9 , Figure 10 , the mounting seat 33 is provided with a mounting groove 331 on the side wall close to the butt joint plate 34, and the rotating plate 35 is fixedly provided with a rotating rod 351 on the side wall close to the mounting seat 33. One end of the rotating rod 351 is coaxially fixed to the rotating plate 35, and the other end of the rotating rod 351 extends into the mounting groove 331 and is coaxially connected with a rotating gear 352. The butt joint plate 34 is coaxially fixed with a butt joint ring 343 on the side wall close to the mounting groove 331, the butt joint ring 343 is inserted into the mounting groove 331, and the inner circumferential wall of the butt joint ring 343 is coaxially fixed with a rotating gear ring 342.

[0068] The middle axis of the rotating rod 351 is located at the center of the mounting groove 331, and a plurality of transition gear sets 4 are arranged in the mounting groove 331 and are spaced around the middle axis of the rotating rod 351; each transition gear set 4 includes a plurality of transition gears 41 rotatably mounted to the inner wall of the mounting groove 331, the diameters of the plurality of transition gears 41 gradually increase from the side close to the center of the mounting groove 331 to the side away from the center of the mounting groove 331, the adjacent two transition gears 41 are in meshing transmission, the rotating gear 352 is in meshing transmission with the transition gear 41 with the smallest diameter, the rotating gear ring 342 is in meshing transmission with the transition gear 41 with the largest diameter, and the rotating gear 352 and the rotating gear ring 342 are in meshing transmission through the plurality of transition gear sets 4.

[0069] With reference to Figure 4 , Figure 11 The limiting member is arranged on the outer cylinder 14 to limit the free rotation of the adjusting ring 32, and the limiting member is arranged in a plurality of groups and is spaced around the middle axis of the outer cylinder 14, and the plurality of limiting members are arranged corresponding to the plurality of abutting rods 341; in this embodiment, the limiting member includes a limiting rod 36 and a limiting spring 37, the limiting rod 36 is slidingly mounted in the rotating groove 141, one end of the limiting spring 37 is fixedly connected to the limiting rod 36, and the other end is fixedly connected to the inner wall of the rotating groove 141; the limiting spring 37 normally forces the limiting rod 36 to be inserted into the abutting hole 322 of the adjusting ring 32 to limit the free rotation of the adjusting ring 32, and when the abutting rod 341 of the abutting plate 34 is inserted into the abutting hole 322, the abutting rod 341 pushes the limiting rod 36 out of the abutting hole 322.

[0070] The implementation principle of the embodiment 2 of the present application is that according to the structure and shape of the combustion chamber 2, the gas pre-rotation angle is adjusted through the adjusting mechanism 3, that is, by controlling the gas pre-rotation angle, the cutting-in direction of the gas into the combustion chamber 2 can be controlled, the mixing effect of the fuel and air is improved, the rotation direction of the airflow is controlled, and the geometric shape of the combustion chamber 2 is cooperated to help form a stable detonation wave mode, so as to accurately control the detonation wave mode in the combustion chamber 2.

[0071] When the pre-rotation angle of the gas is adjusted, the intake shell 1 is separated from the combustion chamber 2, and then the abutting rod 341 of the abutting plate 34 is inserted into the abutting hole 322 of the adjusting ring 32, the abutting rod 341 can extrude the limiting rod 36 out of the abutting hole 322, so as to release the limiting effect on the adjusting ring 32; at this time, rotating the rotating plate 35 can drive the adjusting ring 32 to rotate, the diameters of the plurality of transition gears 41 gradually increase from the side close to the center of the mounting groove 331 to the side away from the center of the mounting groove 331, so that when the rotating plate 35 is rotated by a certain angle, the rotating angle of the abutting plate 34 is much lower than the rotating angle of the rotating plate 35, thereby the flipping angle of the adjusting sheet 31 can be finely adjusted, and the accuracy of the gas pre-rotation angle adjustment is improved.

[0072] After the pre-rotation angle of the gas is adjusted, the abutting rod 341 is extracted from the adjusting ring 32, and the limiting rod 36 can be inserted into the abutting hole 322 under the action of the limiting spring 37 to limit the free rotation of the adjusting ring 32, thereby improving the operation convenience of the overall structure.

[0073] The limiting surface 3212 of the second through groove 321 is used to limit the maximum displacement range of the adjusting rod 313. The distance between the pushing surface 3211 and the limiting surface 3212 is greater than the outer diameter of the adjusting rod 313, so that in the gas inlet stage, the gas acts on the adjusting sheet 31, and the peripheral wall of the adjusting rod 313 can abut against the pushing surface 3211. At this time, the direction of the adjusting channel 311 remains constant under the action of the pushing surface 3211. When the pressure wave and / or combustion products generated in the combustion chamber 2 are returned, the pressure wave and / or combustion products generated in the combustion chamber 2 have a pushing effect on the adjusting sheet 31, which can slightly swing the free end of the adjusting sheet 31, forcing the adjusting rod 313 to displace and abut against the limiting surface 3212, thereby increasing the contact area of the adjusting sheet 31 with the pressure wave and / or combustion products and improving the blocking effect of the returned pressure wave and / or combustion products.

[0074] Embodiment 3:

[0075] The embodiment of the present application discloses a pre-rotation structure for inducing the propagation direction of the detonation wave of a rotary detonation combustion chamber.

[0076] With reference to Figure 12 The pre-rotation structure for inducing the propagation direction of the detonation wave of a rotary detonation combustion chamber disclosed in the embodiment of the present application is different from that of Embodiment 2 in that:

[0077] In the embodiment, the surface of each adjusting sheet 31 is provided with a rotation channel 314, and the rotation channels 314 of adjacent two adjusting channels 311 are connected with each other through the rotation channel 314. The rotation channel 314 is in a “V” shape, and the two ends of the rotation channel 314 respectively face the outlet ends of the adjacent two adjusting channels 311.

[0078] The adjusting sheet 31 is provided with an opening and closing member for opening and closing the rotation channel 314. When the gas flows from the inlet end of the adjusting channel 311 to the outlet end of the adjusting channel 311, the opening and closing member closes the rotation channel 314. When the pressure of the combustion chamber 2 is returned and the combustion products are returned, the opening and closing member opens the rotation channel 314.

[0079] With reference to Figure 12For the convenience of description, the surface of the adjusting piece 31 close to the combustion chamber 2 is defined as the meeting surface 315 (the meeting surface 315 is the surface impacted when the pressure wave and / or the combustion product returns), the meeting surface 315 is provided with a turnover groove 316, and the end of the turnover channel 314 close to the meeting surface 315 is communicated with the turnover groove 316; the opening and closing piece comprises a turnover piece 317 and a torsion spring, one side of the turnover piece 317 is hinged to the inner wall of the turnover groove 316, and the other side of the turnover piece 317 is defined as the free side of the turnover piece 317; the torsion spring (not shown in the figure) is installed at the hinge between the turnover piece 317 and the turnover groove 316, the torsion spring normally forces the surface of the turnover piece 317 to be flush with the meeting surface 315 and close to the end of the turnover channel 314 close to the meeting surface 315, when the pressure wave and / or the combustion product returns and impacts the turnover piece 317, the free side of the turnover piece 317 turns inwardly to the turnover groove 316 to open the end of the turnover channel 314 close to the meeting surface 315.

[0080] The implementation principle of the embodiment 3 of the present application is that when the pressure wave and / or the combustion product generated in the combustion chamber 2 returns, at this time, the pressure wave and / or the combustion product returns impact the turnover piece 317 to open the turnover channel 314, part of the pressure wave and / or the combustion product enters the adjacent adjusting channel 311 through the turnover channel 314, collides with the pressure wave and / or the combustion product in the adjacent adjusting channel 311, thereby weakening the pressure wave and / or the combustion product in the adjacent adjusting channel 311, forming a first weakening. After the pressure wave and / or the combustion product returns to the intake flow channel 11, the "Tesla valve" structured intake flow channel 11 forms a second weakening to the returned pressure wave and / or the combustion product, so that the returned pressure wave and / or the combustion product has little influence on the forward entering of air and fuel, thereby reducing the total pressure loss of the intake air and improving the total pressure gain of the rotary detonation combustion chamber 2.

[0081] The above is the preferred embodiment of the present application, which does not limit the protection scope of the present application, therefore: all equivalent changes made according to the structure, shape, principle of the present application should be covered in the protection scope of the present application.

Claims

1. A structure for inducing intake pre-swirl in the direction of propagation of a detonation wave in a rotary detonation chamber, characterized by: The application relates to a gas intake shell (1) arranged at the entrance of a combustion chamber (2), wherein the gas intake shell (1) is provided with a gas intake channel (11), the gas intake channel (11) comprises a gas intake passage (111), a connecting passage (112), an expansion passage (113) and a backflow passage (114), one end of the gas intake passage (111) is used for introducing air and fuel, the other end is communicated with the connecting passage (112), the small end of the expansion passage (113) is communicated with the connecting passage (112) far away from the gas intake passage (111), and the large end of the expansion passage (113) is communicated with the combustion chamber (2); the inlet end of the backflow passage (114) is communicated with the connecting passage (112) far away from the expansion passage (113), and the outlet end of the backflow passage (114) is communicated with the gas intake passage (111); a plurality of guide vanes (12) are arranged in the expansion passage (113) and are arranged in a circumferential interval, and a pre-rotation passage (121) for pre-rotating gas is formed between two adjacent guide vanes (12); an inner cylinder (13) and an outer cylinder (14) are coaxially arranged on the side wall of the gas intake shell (1) close to the combustion chamber (2), the outer circumferential wall of the inner cylinder (13) and the inner circumferential wall of the outer cylinder (14) are arranged at intervals and form a connecting passage (15), one end of the connecting passage (15) is communicated with the large end of the expansion passage (113), the other end is communicated with the combustion chamber (2), and the expansion passage (113) is communicated with the combustion chamber (2) through the connecting passage (15); an adjusting mechanism (3) for adjusting the pre-rotation angle of the gas is arranged in the connecting passage (15); the adjusting mechanism (3) comprises adjusting pieces (31) and an adjusting assembly, the adjusting pieces (31) are arranged in the connecting passage (15) and are arranged in a circumferential interval around the inner cylinder (13), the adjusting pieces (31) and the guide vanes (12) are correspondingly arranged, one side of each adjusting piece (31) is hinged to the side of the corresponding guide vane (12) close to the connecting passage (15), and adjusting passages (311) are formed between two adjacent adjusting pieces (31); the adjusting assembly is arranged on the outer cylinder (14) and is used for synchronously turning over the free ends of all the adjusting pieces (31); a rotation passage (314) is arranged on the surface of the adjusting piece (31), two adjacent adjusting passages (311) are communicated with each other through the rotation passage (314), and the two ends of the rotation passage (314) are respectively directed to the outlet ends of the two adjacent adjusting passages (311); the adjusting piece (31) is provided with an opening and closing piece for opening and closing the rotation passage (314), when the gas flows from the inlet end of the adjusting passage (311) to the outlet end of the adjusting passage (311), the opening and closing piece closes the rotation passage (314), and when the pressure of the combustion chamber (2) is returned and the combustion products are returned, the opening and closing piece opens the rotation passage (314).

2. A rotating detonation chamber detonation wave propagation direction inducing air intake pre-swirl structure according to claim 1, characterized in that: The backflow channel (114) comprises a straight section (1141) and an arc section (1142), the straight section (1141) is linearly communicated with the connecting channel (112) and the expansion channel (113), one end of the arc section (1142) is communicated with one end of the straight section (1141) away from the connecting channel (112), and the other end is communicated with the air inlet channel (111), and the included angle between the air inlet channel (111) and the straight section (1141) is an acute angle.

3. A rotating detonation chamber detonation wave propagation direction induced air intake pre-swirl structure according to claim 1, characterized in that: One end of the adjusting piece (31) is provided with a rotating shaft (312), the rotating shaft (312) is rotatably connected to the guide vane (12), and one side of the adjusting piece (31) is hinged to the corresponding guide vane (12) through the rotating shaft (312); the end face of the outer cylinder (14) close to the combustion chamber (2) is provided with a rotating groove (141), and the free side of each adjusting piece (31) is provided with an adjusting rod (313), one end of the adjusting rod (313) penetrates into the rotating groove (141); the adjusting assembly comprises an adjusting ring (32), a rotating piece and a limiting piece, the adjusting ring (32) is rotatably installed in the rotating groove (141), when the adjusting ring (32) rotates around its central axis, the adjusting ring (32) drives all adjusting pieces (31) to overturn synchronously through the adjusting rod (313); the rotating piece is detachably arranged on the outer cylinder (14) to drive the adjusting ring (32) to rotate, and the limiting piece is arranged on the outer cylinder (14) to limit the free rotation of the adjusting ring (32).

4. A rotating detonation chamber detonation wave propagation direction inducing air intake pre-swirl structure according to claim 3, characterized in that: The inner wall of the outer cylinder (14) is provided with a plurality of first penetrating grooves (142) communicated with the rotating grooves (141), a plurality of the first penetrating grooves (142) are correspondingly arranged with a plurality of adjusting pieces (31), each first penetrating groove (142) is arranged in an arc shape around the central axis of the rotating shaft (312), so as to allow the adjusting rod (313) of the corresponding adjusting piece (31) to extend into the rotating groove (141); the adjusting ring (32) is provided with a plurality of second penetrating grooves (321), a plurality of the second penetrating grooves (321) are correspondingly arranged with a plurality of adjusting pieces (31), and both ends of each second penetrating groove (321) are arranged in the axial direction of the outer cylinder (14), so as to allow the adjusting rod (313) of the corresponding adjusting piece (31) to be inserted, when the adjusting ring (32) rotates around its central axis, the adjusting ring (32) pushes the adjusting rod (313) through the inner wall of the second penetrating groove (321), so as to force the adjusting rod (313) to displace along the arc of the first penetrating groove (142).

5. A rotating detonation chamber detonation wave propagation direction inducing air intake pre-swirl structure according to claim 3, characterized in that: The rotating part comprises a mounting seat (33), a butt joint plate (34) and a rotating plate (35), the butt joint plate (34) and the rotating plate (35) are rotatably installed at two ends of the mounting seat (33) respectively, a butt joint rod (341) is arranged on the side wall of the butt joint plate (34) away from the mounting seat (33), a butt joint hole (322) is arranged on the side wall of the adjusting ring (32) and is used for inserting the butt joint rod (341), an installation groove (331) is arranged on the side wall of the mounting seat (33) close to the butt joint plate (34), a rotating rod (351) is coaxially connected to the rotating plate (35), one end of the rotating rod (351) away from the rotating plate (35) extends into the installation groove (331) and is coaxially connected with a rotating gear (352), a rotating gear ring (342) is coaxially connected to the side wall of the butt joint plate (34) close to the installation groove (331), and the rotating gear (352) and the rotating gear ring (342) are in meshing transmission.

6. A rotating detonation chamber detonation wave propagation direction inducing air intake pre-swirl structure according to claim 5, characterized in that: A plurality of groups of transition gear sets (4) are arranged in the installation groove (331), and the plurality of groups of transition gear sets (4) are arranged at intervals around the central axis of the rotating rod (351); each group of transition gear sets (4) comprises a plurality of transition gears (41) rotatably installed on the inner wall of the installation groove (331), the diameters of the plurality of transition gears (41) gradually increase from the side close to the center of the installation groove (331) to the side away from the center of the installation groove (331), and adjacent two transition gears (41) are in meshing transmission; the rotating gear (352) is in meshing transmission with the transition gear (41) with the smallest diameter, the rotating gear ring (342) is in meshing transmission with the transition gear (41) with the largest diameter, and the rotating gear (352) and the rotating gear ring (342) are in meshing transmission through the plurality of groups of transition gear sets (4).

7. A rotating detonation chamber detonation wave propagation direction inducing air intake pre-swirl structure according to claim 5, characterized in that: The limiting part comprises a limiting rod (36) and a limiting spring (37), the limiting rod (36) is slidingly installed in the rotating groove (141), the limiting spring (37) is installed between the limiting rod (36) and the inner wall of the rotating groove (141), and the limiting spring (37) normally forces the limiting rod (36) to be inserted into the butt joint hole (322) of the adjusting ring (32) to limit the free rotation of the adjusting ring (32); a plurality of butt joint holes (322) are arranged around the central axis of the adjusting ring (32), and when the butt joint rod (341) of the butt joint plate (34) is inserted into the butt joint hole (322), the butt joint rod (341) forces the limiting rod (36) to be separated from the butt joint hole (322).

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