Oil-cooled burner and ramjet

Abstract

The present invention provides an oil-cooled burner and a ramjet engine. The oil-cooled burner includes a first evaporation tube, a first stabilizer skirt, a second stabilizer skirt, a connecting bracket, and an oil injection pipe. The first evaporation tube is disposed between the first stabilizer skirt and the second stabilizer skirt. The first stabilizer skirt and the second stabilizer skirt extend in a first direction from the first evaporation tube. The connecting bracket is disposed on the first evaporation tube and extends in a second direction. The oil injection pipe is disposed on the connecting bracket and is arranged at intervals with the first evaporation tube. The oil injection pipe is provided with a first oil injection port, and the first oil injection port, the lumen of the oil injection pipe, and the lumen of the first evaporation tube are communicated. The oil-cooled burner of the present invention can be disposed in the combustion chamber flow passage of the ramjet engine and form a blocking effect to effectively suppress the distortion of the oncoming flow, improve the uniformity of the fuel concentration in the combustion zone of the ramjet engine. At the same time, the fuel in the oil-cooled burner also serves as a cooling medium to cool down the oil-cooled burner itself.

Description

Technical Field

[0001] The present invention relates to the technical field of burners, and particularly relates to an oil-cooled burner and a ramjet engine. Background Art

[0002] A burner is a general term for a device that sprays and mixes fuel and air for combustion.

[0003] A ramjet engine is an air-breathing engine with high thrust and suitable for high-altitude and high-speed flight. It generally consists of an inlet (also known as a diffuser), a combustion chamber, and a propulsion nozzle.

[0004] At present, ramjet engines need to be able to work efficiently under large angle of attack and high-altitude low-pressure conditions to meet the requirements of wide-speed-range and large-maneuver aircraft. However, in related technologies, due to the extremely large distortion degree of the outlet flow field of the inlet, the fuel concentration in the combustion zone is extremely uneven, which affects the combustion performance. At the same time, the non-uniformity of the flow field will cause the non-uniform distribution of the cooling air, increasing the difficulty of thermal protection. Summary of the Invention

[0005] The present invention aims to solve at least one of the technical problems in related technologies to some extent. For this purpose, an embodiment of the present invention provides an oil-cooled burner, which can be arranged in the combustion chamber flow channel of a ramjet engine and form a blocking effect to effectively suppress the distortion of the oncoming flow, improve the uniformity of the fuel concentration in the combustion zone of the ramjet engine, and at the same time, the fuel in the oil-cooled burner also serves as a cooling medium to cool the oil-cooled burner itself.

[0006] An embodiment of the present invention also provides a ramjet engine.

[0007] The oil-cooled burner according to the embodiment of the present invention includes:

[0008] A first evaporation tube, which extends in a straight line direction;

[0009] A first stabilizer skirt, which is arranged at a radial end of the first evaporation tube and extends from the first evaporation tube in a first direction;

[0010] A second stabilizer skirt, which is arranged at the other radial end of the first evaporation tube and extends from the first evaporation tube in the first direction;

[0011] A connecting bracket, which is arranged on the first evaporation tube and extends from the first evaporation tube in a second direction, and the second direction is the reverse of the first direction;

[0012] The fuel injection pipe is provided on the connection bracket, and the fuel injection pipe and the first evaporation pipe are arranged at intervals in the second direction. The fuel injection pipe is provided with a first fuel injection port, the first fuel injection port communicates with the lumen of the fuel injection pipe, and the lumen of the fuel injection pipe communicates with the lumen of the first evaporation pipe.

[0013] The oil-cooled burner according to the embodiment of the present invention can be arranged in the combustion chamber flow path of the ramjet engine and form a blocking effect to effectively suppress the distortion of the oncoming flow. At the same time, the distance between the first fuel injection port of the oil-cooled burner according to the embodiment of the present invention and the first stabilizer skirt and the second stabilizer skirt is short, which can reduce the mixing length of fuel and air, further improve the adaptability of the combustion chamber of the ramjet engine to the distorted oncoming flow, and improve the uniformity of the fuel concentration in the combustion zone of the ramjet engine. In addition, the lumen of the fuel injection pipe communicates with the lumen of the first evaporation pipe, so that the fuel in the oil-cooled burner also serves as a cooling medium to cool the oil-cooled burner itself, which can effectively cool the oil-cooled burner. The fuel absorbs the heat of the oncoming air during the process of cooling the oil-cooled burner, increasing the temperature of the fuel itself. After the fuel is injected into the combustion zone, it can increase the initial temperature of fuel combustion, improving the combustion performance of the combustion chamber under low-pressure working conditions. Thus, the combustion chamber of the ramjet engine has the ability to work stably and efficiently under large distortion and low-pressure conditions.

[0014] In some embodiments, the first evaporation pipe is provided with evaporation holes. The evaporation holes are located at one end of the first evaporation pipe in the first direction, and the evaporation holes communicate with the inner cavity of the first evaporation pipe. There are multiple evaporation holes, and the multiple evaporation holes are arranged at intervals along the extension direction of the first evaporation pipe.

[0015] In some embodiments, the first stabilizer skirt includes a first connecting portion and a first skirt portion. In the cross-section of the first evaporation pipe, the projection of the first connecting portion extends in a direction orthogonal to the first direction, and the projection of the first skirt portion extends in the first direction. The first connecting portion is provided with first air holes, the first air holes penetrate through the first connecting portion in the first direction. There are multiple first air holes, and the multiple first air holes are arranged at intervals along the extension direction of the first evaporation pipe;

[0016] The second stabilizer skirt includes a second connecting portion and a second skirt portion. In the cross-section of the first evaporation pipe, the projection of the second connecting portion extends in a direction orthogonal to the first direction, and the projection of the second skirt portion extends in the first direction. The second connecting portion is provided with second air holes, the second air holes penetrate through the second connecting portion in the first direction. There are multiple second air holes, and the multiple second air holes are arranged at intervals along the extension direction of the first evaporation pipe. The first skirt portion and the second skirt portion extend in the first direction and are inclined in opposite directions away from each other.

[0017] In some embodiments, the connecting bracket is provided at an axial end of the first evaporation tube. The connecting bracket is provided with an oil inlet and a connecting oil passage. The lumen of the fuel injection pipe and / or the lumen of the first evaporation tube communicate with the oil inlet, and the connecting oil passage communicates the lumen of the fuel injection pipe with the lumen of the first evaporation tube.

[0018] In some embodiments, a first oil cooling pipeline is provided inside the pipe wall of the fuel injection pipe. The first oil cooling pipeline extends along the extending direction of the fuel injection pipe, and the first oil cooling pipeline is located on one side of the lumen of the fuel injection pipe in the second direction. The first oil cooling pipeline communicates with the connecting oil passage. The first fuel injection port includes a first sub-port. The opening direction of the first sub-port is orthogonal to the extending direction of the fuel injection pipe and the first direction. The first sub-ports are multiple, and the multiple first sub-ports are arranged at intervals along the extending direction of the fuel injection pipe. The first sub-port communicates with the lumen of the fuel injection pipe and / or the first oil cooling pipeline.

[0019] In some embodiments, a second oil cooling pipeline is provided inside the pipe wall of the first evaporation tube. The second oil cooling pipeline extends along the extending direction of the first evaporation tube, and the second oil cooling pipeline communicates with the connecting oil passage.

[0020] In some embodiments, both the first stabilizer skirt and the second stabilizer skirt are provided with a third oil cooling pipeline and a fourth oil cooling pipeline. The third oil cooling pipeline extends along the extending direction of the first evaporation tube, and the fourth oil cooling pipeline extends along the first direction. The fourth oil cooling pipeline communicates the third oil cooling pipeline with the connecting oil passage.

[0021] In some embodiments, the oil-cooled burner further includes a second evaporation tube. The second evaporation tube is arranged around the first direction and forms an air inlet by surrounding. The axial other end of the first evaporation tube is connected to the second evaporation tube, and the lumen of the first evaporation tube communicates with the lumen of the second evaporation tube. The first evaporation tubes are multiple, and the multiple first evaporation tubes are arranged at intervals along the circumferential direction of the second evaporation tube;

[0022] The fuel injection pipes are multiple, and the multiple fuel injection pipes are arranged in one-to-one correspondence with the multiple first evaporation tubes and are connected. The fuel injection port includes a second sub-port. The second sub-port is located at the connection of the multiple fuel injection pipes, and the opening direction of the second sub-port is set to face the air inlet.

[0023] In some embodiments, a second fuel injection port is provided on the inner circumferential surface of the second evaporation tube forming the air inlet. The second fuel injection ports are multiple, and the multiple second fuel injection ports are in one-to-one correspondence and communication with the lumens of the multiple first evaporation tubes; and / or

[0024] A fifth oil cooling pipeline is provided inside the pipe wall of the second evaporation pipe. The fifth oil cooling pipeline is arranged around the axial direction of the second evaporation pipe and is communicated with the oil inlet.

[0025] The ramjet engine according to the embodiment of the present invention includes a combustion chamber flow path and an oil-cooled burner. The oil-cooled burner is the oil-cooled burner described in any one of the above embodiments, and the oil-cooled burner is arranged inside the combustion chamber flow path.

[0026] The ramjet engine according to the embodiment of the present invention is provided with the oil-cooled burner according to the embodiment of the present invention in the combustion chamber flow path. By forming a blocking effect through the oil-cooled burner, the distortion of the oncoming flow can be effectively suppressed. At the same time, the distances between the first fuel injection port of the oil-cooled burner according to the embodiment of the present invention and the first stabilizer skirt and the second stabilizer skirt are relatively short, which can reduce the mixing length of fuel and air, further improve the adaptability of the combustion chamber of the ramjet engine to the distorted oncoming flow, and improve the uniformity of the fuel concentration in the combustion zone of the ramjet engine. In addition, the lumen of the fuel injection pipe is communicated with the lumen of the first evaporation pipe, so that the fuel in the oil-cooled burner also serves as a cooling medium at the same time to cool the oil-cooled burner itself, and the oil-cooled burner can be effectively cooled. The fuel absorbs the heat of the oncoming air during the process of cooling the oil-cooled burner, increases the temperature of the fuel itself, and can increase the initial temperature of fuel combustion after the fuel is injected into the combustion zone, so as to improve the combustion performance of the combustion chamber under low-pressure working conditions. Therefore, the combustion chamber of the ramjet engine has the ability to work stably and efficiently under large distortion and low-pressure conditions. Description of the Drawings

[0027] Figure 1 is the isometric view of the oil-cooled burner according to the embodiment of the present invention;

[0028] Figure 2 is the rear view of the oil-cooled burner according to the embodiment of the present invention;

[0029] Figure 3 is the front view of the oil-cooled burner according to the embodiment of the present invention;

[0030] Figure 4 is the top view of the oil-cooled burner according to the embodiment of the present invention;

[0031] Figure 5 is Figure 3 the sectional view taken along the line A-A of the oil-cooled burner in

[0032] Figure 6 is Figure 4 the sectional view taken along the line B-B of the oil-cooled burner in

[0033] Figure 7 is Figure 3 the sectional view taken along the line C-C of the oil-cooled burner in

[0034] Figure 8 Is Figure 3 The D-D cross-sectional view of the medium oil-cooled burner;

[0035] Figure 9 Is Figure 3 The E-E cross-sectional view of the medium oil-cooled burner;

[0036] Figure 10 Is Figure 3 The F-F cross-sectional view of the medium oil-cooled burner;

[0037] Figure 11 Is Figure 3 The G-G cross-sectional view of the medium oil-cooled burner;

[0038] Figure 12 Is Figure 3 The H-H cross-sectional view of the medium oil-cooled burner;

[0039] Figure 13 Is the left view of the oil-cooled burner of the embodiment of the present invention;

[0040] Figure 14 Is Figure 13 The R-R cross-sectional view of the medium oil-cooled burner;

[0041] Figure 15 Is Figure 13 The S-S cross-sectional view of the medium oil-cooled burner.

[0042] Reference signs:

[0043] 1. First evaporation tube; 11. Evaporation holes; 12. Second oil-cooled pipeline; 13. Oil inlet pipeline; 2. First stabilizer skirt; 21. First connection part; 22. First skirt part; 23. First air holes; 3. First stabilizer skirt; 31. Second connection part; 32. Second skirt part; 33. Second air holes; 4. Connection bracket; 41. Oil inlet; 42. Connection oil pipeline; 5. Fuel injection pipe; 51. First oil-cooled pipeline; 52. First sub-port; 53. Second sub-port; 6. Second evaporation tube; 61. Air inlet; 62. Fifth oil-cooled pipeline; 7. Third oil-cooled pipeline; 8. Fourth oil-cooled pipeline. Detailed Description of the Invention

[0044] The embodiments of the present invention will be described in detail below, and examples of the embodiments are shown in the drawings. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0045] The following refers to Figures 1 - 15 Describe an oil-cooled burner and a ramjet engine according to an embodiment of the invention.

[0046] AsFigures 1 - 15 As shown, the oil-cooled burner and the ramjet engine according to the embodiments of the present invention include a first evaporation tube 1, a first stabilizer skirt 2, a second stabilizer skirt 3, a connecting bracket 4, and an oil injection pipe 5.

[0047] The first evaporation tube 1 extends in a straight line direction. Specifically, as Figure 1 shown, the first evaporation tube 1 extends in the up-down direction or the left-right direction.

[0048] The first stabilizer skirt 2 is provided at a radial end of the first evaporation tube 1, and the first stabilizer skirt 2 extends from the first evaporation tube 1 in a first direction (such as Figure 1 the direction from front to back as shown). Specifically, as Figure 1 shown, the first stabilizer skirt 2 is provided at the end of the first evaporation tube 1 that is clockwise around the front-back direction. The first stabilizer skirt 2 extends along the extension direction of the first evaporation tube 1, and at the same time, the first stabilizer skirt 2 extends backward from the outer peripheral surface of the first evaporation tube 1.

[0049] The second stabilizer skirt 3 is provided at the other radial end of the first evaporation tube 1, and the second stabilizer skirt 3 extends from the first evaporation tube 1 in the first direction. Specifically, as Figure 1 shown, the second stabilizer skirt 3 is provided at the end of the first evaporation tube 1 that is counterclockwise around the front-back direction. The second stabilizer skirt 3 extends along the extension direction of the first evaporation tube 1, and at the same time, the first stabilizer skirt 2 extends backward from the outer peripheral surface of the first evaporation tube 1. In other words, the first evaporation tube 1 is located between the first stabilizer skirt 2 and the second stabilizer skirt 3.

[0050] The connecting bracket 4 is provided on the first evaporation tube 1, and the connecting bracket 4 extends from the first evaporation tube 1 in a second direction (such as Figure 1 the direction from back to front as shown), and the second direction is the reverse of the first direction. Specifically, as Figure 1 shown, a connecting bracket 4 is provided at one end of the first evaporation tube 1, and the connecting bracket 4 extends forward from the first evaporation tube 1.

[0051] The oil injection pipe 5 is provided on the connecting bracket 4, and the oil injection pipe 5 and the first evaporation tube 1 are arranged at intervals in the second direction. The oil injection pipe 5 is provided with a first oil injection port, the first oil injection port is communicated with the lumen of the oil injection pipe 5, and the lumen of the oil injection pipe 5 is communicated with the lumen of the first evaporation tube 1. Specifically, as Figure 1 shown, the oil injection pipe 5 is provided at the front end of the connecting bracket 4. The oil injection pipe 5 and the corresponding first evaporation tube 1 are arranged at intervals in the front-back direction, and the oil injection pipe 5 is located on the front side of the corresponding first evaporation tube 1. The extension direction of the oil injection pipe 5 is the same as the extension direction of the corresponding first evaporation tube 1. In other words, the oil injection pipe 5 and the corresponding first evaporation tube 1 are arranged opposite to each other in the front-back direction. The oil injection pipe 5 is provided with a first oil injection port, the first oil injection port is communicated with the lumen of the oil injection pipe 5, and the lumen of the oil injection pipe 5 is communicated with the lumen of the first evaporation tube 1.

[0052] The oil-cooled burner according to the embodiment of the present invention can be arranged in the combustion chamber flow path of a ramjet engine to form a blocking effect, so as to effectively suppress the distortion of the oncoming flow. At the same time, the distances between the first fuel injection port of the oil-cooled burner according to the embodiment of the present invention and the first stabilizer skirt and the second stabilizer skirt are short, which can reduce the mixing length of fuel and air, further improve the adaptability of the combustion chamber of the ramjet engine to the distorted oncoming flow, and enhance the uniformity of the fuel concentration in the combustion zone of the ramjet engine. In addition, the lumen of the fuel injection pipe is communicated with the lumen of the first evaporation pipe, so that the fuel in the oil-cooled burner also serves as a cooling medium to cool the oil-cooled burner itself, which can effectively cool the oil-cooled burner. During the process of cooling the oil-cooled burner, the fuel absorbs the heat of the oncoming air to increase its own temperature. After the fuel is injected into the combustion zone, it can increase the initial temperature of fuel combustion to improve the combustion performance of the combustion chamber under low-pressure working conditions. Thus, the combustion chamber of the ramjet engine has the ability to work stably and efficiently under large distortion and low-pressure conditions.

[0053] In some embodiments, the first evaporation pipe 1 is provided with evaporation holes 11. The evaporation holes 11 are located at one end of the first evaporation pipe 1 in the first direction, and the evaporation holes 11 are communicated with the inner cavity of the first evaporation pipe 1. There are multiple evaporation holes 11, and the multiple evaporation holes 11 are arranged at intervals along the extending direction of the first evaporation pipe 1.

[0054] As Figure 2 shown, two rows of evaporation holes 11 are provided at the rear end of the first evaporation pipe 1. The two rows of evaporation holes 11 are arranged at intervals along the radial direction of the first evaporation pipe 1. Each row of evaporation holes 11 has multiple evaporation holes 11, and the multiple evaporation holes 11 are arranged at intervals along the extending direction of the first evaporation pipe 1. As Figure 10 shown, the evaporation holes 11 are communicated with the inner cavity of the first evaporation pipe 1.

[0055] In some embodiments, the first stabilizer skirt 2 includes a first connecting portion 21 and a first skirt portion 22. In the cross-section of the first evaporation pipe 1, the projection of the first connecting portion 21 extends along the direction orthogonal to the first direction, and the projection of the first skirt portion 22 extends along the first direction. The first connecting portion 21 is provided with first air holes 23. The first air holes 23 penetrate through the first connecting portion 21 along the first direction. There are multiple first air holes 23, and the multiple first air holes 23 are arranged at intervals along the extending direction of the first evaporation pipe 1.

[0056] Specifically, as Figure 1 , Figure 3 and Figure 10As shown, the first stabilizer skirt 2 includes a first connecting portion 21 and a first skirt portion 22. The first connecting portion 21 extends in the horizontal direction and is provided on the first evaporation tube 1. The first skirt portion 22 is provided at one end of the first connecting portion 21 different from the end connecting the first evaporation tube 1. The first skirt portion 22 extends backward from the first connecting portion 21. A plurality of first air holes 23 are provided on the first connecting portion 21. The plurality of first air holes 23 are arranged at intervals along the extending direction of the corresponding first evaporation tube 1. The first air holes 23 penetrate the first connecting portion 21 in the front-rear direction.

[0057] The second stabilizer skirt 3 includes a second connecting portion 31 and a second skirt portion 32. In the cross-section of the first evaporation tube 1, the projection of the second connecting portion 31 extends in a direction orthogonal to the first direction, and the projection of the second skirt portion 32 extends in the first direction. The second connecting portion 31 is provided with second air holes 33. The second air holes 33 penetrate the second connecting portion 31 in the first direction. The second air holes 33 are multiple. The multiple second air holes 33 are arranged at intervals along the extending direction of the first evaporation tube 1. The first skirt portion 22 and the second skirt portion 32 extend in the first direction and are inclined in the relatively far-away direction.

[0058] Specifically, as Figure 1 、 Figure 3 and Figure 10 shown, the second stabilizer skirt 3 includes a second connecting portion 31 and a second skirt portion 32. The second connecting portion 31 extends in the horizontal direction and is provided on the first evaporation tube 1. The second skirt portion 32 is provided at one end of the second connecting portion 31 different from the end connecting the first evaporation tube 1. The second skirt portion 32 extends backward from the second connecting portion 31, and the first skirt portion 22 and the second skirt portion 32 are inclined in the relatively far-away direction. In other words, the first evaporation tube 1 is located between the first connecting portion 21 and the second connecting portion 31. The first connecting portion 21 and the second connecting portion 31 extend in the relatively far-away direction from the first evaporation tube 1 in the horizontal direction. The first skirt portion 22 and the second skirt portion 32 extend backward and are inclined in the relatively far-away direction. A plurality of second air holes 33 are provided on the second connecting portion 31. The multiple second air holes 33 are arranged at intervals along the extending direction of the corresponding first evaporation tube 1. The second air holes 33 penetrate the second connecting portion 31 in the front-rear direction. In other words, the first evaporation tube 1 is located between a row of first air holes 23 and a row of second air holes 33.

[0059] In some embodiments, the connecting bracket 4 is provided at one axial end of the first evaporation tube 1. The connecting bracket 4 is provided with an oil inlet 41 and a connecting oil passage 42. The lumen of the fuel injection pipe 5 and / or the lumen of the first evaporation tube 1 communicate with the oil inlet 41. The connecting oil passage 42 communicates the lumen of the fuel injection pipe 5 with the lumen of the first evaporation tube 1.

[0060] As Figure 1 、 Figure 4 、 Figures 8 - 11As shown, the connecting bracket 4 is provided at one axial end of the first evaporation tube 1. The end faces of the first stabilizer skirt 2, the second stabilizer skirt 3, and the end face of the connecting bracket 4 away from the first evaporation tube 1 are flush. An oil inlet 41 is provided on the end face of the connecting bracket 4 away from the first evaporation tube 1. A connecting oil passage 42 is provided inside the connecting bracket 4. The oil inlet 41 is communicated with the lumen of the fuel injection pipe 5 and / or the lumen of the first evaporation tube 1 for supplying fuel into the lumen of the fuel injection pipe 5 and the lumen of the first evaporation tube 1. The connecting oil passage 42 communicates the lumen of the fuel injection pipe 5 with the lumen of the first evaporation tube 1.

[0061] In some embodiments, a first oil cooling pipeline 51 is provided inside the wall of the fuel injection pipe 5. The first oil cooling pipeline 51 extends along the extending direction of the fuel injection pipe 5, and the first oil cooling pipeline 51 is located on one side of the lumen of the fuel injection pipe 5 in the second direction. The first oil cooling pipeline 51 is communicated with the connecting oil passage 42. The first fuel injection port includes a first sub-port 52. The opening direction of the first sub-port 52 is orthogonal to the extending direction of the fuel injection pipe 5 and the first direction. There are multiple first sub-ports 52, and the multiple first sub-ports 52 are arranged at intervals along the extending direction of the fuel injection pipe 5. The first sub-port 52 is communicated with the lumen of the fuel injection pipe 5 and / or the first oil cooling pipeline 51.

[0062] As Figure 5 、 Figures 12 - 15 shown, a first oil cooling pipeline 51 is provided inside the wall of the fuel injection pipe 5. The first oil cooling pipeline 51 extends along the extending direction of the fuel injection pipe 5, and the first oil cooling pipeline 51 is located at the front side of the lumen of the fuel injection pipe 5. The length of the first oil cooling pipeline 51 is shorter than the length of the fuel injection pipe 5. The first oil cooling pipeline 51 is communicated with the connecting bracket 4 inside the corresponding connecting bracket 4.

[0063] The first fuel injection port includes a first sub-port 52. A plurality of first sub-ports 52 are located on the side wall surface of the fuel injection pipe 5. For example, the fuel injection pipe 5 extends in the up-down direction, and a plurality of first sub-ports 52 are provided on both the left side and the right side of the fuel injection pipe 5. The plurality of first sub-ports 52 on the same side wall surface are divided into two rows, and the plurality of first sub-ports 52 in each row are arranged at intervals along the extending direction of the fuel injection pipe 5. One row of the first sub-ports 52 is communicated with the first oil cooling pipeline 51, and the other row of the first sub-ports 52 is communicated with the lumen of the fuel injection pipe 5.

[0064] One oil inlet 41 on the connecting bracket 4 is communicated with the lumen of the corresponding fuel injection pipe 5.

[0065] In some embodiments, a second oil cooling pipeline 12 is provided inside the wall of the first evaporation tube 1. The second oil cooling pipeline 12 extends along the extending direction of the first evaporation tube 1. The second oil cooling pipeline 12 is communicated with the connecting oil passage 42.

[0066] As Figure 5 、 Figure 10 and Figure 12As shown, a second oil cooling pipeline 12 is provided inside the pipe wall of the first evaporation pipe 1. The second oil cooling pipeline 12 extends along the extension direction of the first evaporation pipe 1. The second oil cooling pipeline 12 is located at the rear side of the lumen of the first evaporation pipe 1 and is located between two rows of evaporation holes 11. One end of the second oil cooling pipeline 12 communicates with the connecting oil path 42 of the corresponding connecting bracket 4.

[0067] In some embodiments, a third oil cooling pipeline 7 and a fourth oil cooling pipeline 8 are provided inside both the first stabilizer skirt 2 and the second stabilizer skirt 3. The third oil cooling pipeline 7 extends along the extension direction of the first evaporation pipe 1. The fourth oil cooling pipeline 8 extends along the first direction, and the fourth oil cooling pipeline 8 communicates the third oil cooling pipeline 7 with the connecting oil path 42.

[0068] As Figure 6 , Figure 7 and Figure 10 shown, a corresponding third oil cooling pipeline 7 and a fourth oil cooling pipeline 8 are provided inside the first stabilizer skirt 2, and a corresponding third oil cooling pipeline 7 and a fourth oil cooling pipeline 8 are also provided inside the second stabilizer skirt 3. The third oil cooling pipeline 7 extends along the extension direction of the first evaporation pipe 1 connected to the first stabilizer skirt 2 and the second stabilizer skirt 3. In other words, the third oil cooling pipeline 7 extends along the length direction of the first stabilizer skirt 2 and the second stabilizer skirt 3. Preferably, the third oil cooling pipeline 7 is provided inside the corresponding first skirt portion 22 or the corresponding second skirt portion 32. Two third oil cooling pipelines 7 are provided inside the first skirt portion 22, and the two third oil cooling pipelines 7 are arranged at intervals in the front-rear direction. Two third oil cooling pipelines 7 are provided inside the second skirt portion 32, and the two third oil cooling pipelines 7 are arranged at intervals in the front-rear direction.

[0069] The fourth oil cooling pipeline 8 extends along the up-down direction. One end of the fourth oil cooling pipeline 8 is located inside the corresponding first skirt portion 22 or the corresponding second skirt portion 32 and communicates with the corresponding two third oil cooling pipelines 7. The other end of the fourth oil cooling pipeline 8 extends into the corresponding first connecting portion 21 or the corresponding second connecting portion 31 and communicates with the connecting oil path 42 indirectly, for example, indirectly communicates with the connecting oil path 42 through the second oil cooling pipeline 12.

[0070] In some embodiments, the oil-cooled burner according to the embodiments of the present invention further includes a second evaporation tube 6. The second evaporation tube 6 is arranged around a first direction and forms an air inlet 61 by surrounding. The other axial end of the first evaporation tube 1 is connected to the second evaporation tube 6, and the lumen of the first evaporation tube 1 is communicated with the lumen of the second evaporation tube 6. There are multiple first evaporation tubes 1, and the multiple first evaporation tubes 1 are arranged at intervals along the circumferential direction of the second evaporation tube 6. There are multiple fuel injection tubes 5, and the multiple fuel injection tubes 5 are arranged in one-to-one correspondence with the multiple first evaporation tubes 1, and the multiple fuel injection tubes 5 are connected. The fuel injection port includes a second sub-port 53. The second sub-port 53 is located at the connection of the multiple fuel injection tubes 5, and the opening direction of the second sub-port 53 is arranged towards the air inlet 61.

[0071] As Figures 1 - 15 shown, the second evaporation tube 6 is an annular shape surrounding the front-back direction. The second evaporation tube 6 forms an air inlet 61 by surrounding. The end of the first evaporation tube 1 different from the end where the connection bracket 4 is arranged is connected to the outer peripheral surface of the second evaporation tube 6, and the lumen of the first evaporation tube 1 is communicated with the lumen of the second evaporation tube 6. Preferably, there are four first evaporation tubes 1. The four first evaporation tubes 1 are arranged at intervals along the circumferential direction of the second evaporation tube 6 and are arranged in a cross shape. Preferably, there are four fuel injection tubes 5. The four fuel injection tubes 5 are arranged in one-to-one correspondence with the four first evaporation tubes 1. The inner ends of the four fuel injection tubes 5 are connected so that the four fuel injection tubes 5 are arranged in a cross shape, and the lumens of the four fuel injection tubes 5 are communicated. The outer ends of the four fuel injection tubes 5 are connected to the corresponding connection brackets 4. The fuel injection port further includes a second sub-port 53. The second sub-port 53 is arranged at the connection of the four fuel injection tubes 5 and is communicated with the communication part of the lumens of the four fuel injection tubes 5, and the opening direction of the second sub-port 53 is arranged towards the air inlet 61.

[0072] As Figure 7 shown, in the circumferential direction of the second evaporation tube 6, among two adjacent first evaporation tubes 1, the first stabilizer skirt 2 on one of the first evaporation tubes 1 is connected to the second stabilizer skirt 3 on the other first evaporation tube 1, and a fourth oil-cooling pipeline 8 is arranged at the connection part of the first stabilizer skirt 2 and the second stabilizer skirt 3. The other end of the fourth oil-cooling pipeline 8 is communicated with the lumen of the second evaporation tube 6.

[0073] In some embodiments, second fuel injection ports are arranged on the inner peripheral surface of the second evaporation tube 6 forming the air inlet 61. There are multiple second fuel injection ports, and the multiple second fuel injection ports are communicated with the lumens of the multiple first evaporation tubes 1 in one-to-one correspondence.

[0074] Specifically, second fuel injection ports are arranged on the inner peripheral surface of the second evaporation tube 6 forming the air inlet 61. The opening direction of the second fuel injection ports is arranged towards the center line of the second evaporation tube 6, and the second fuel injection ports are communicated with the lumen of the second evaporation tube 6. Preferably, there are four second fuel injection ports. The four second fuel injection ports are arranged in one-to-one correspondence with the lumens of the four first evaporation tubes 1. In other words, the second fuel injection ports are located on the extending direction of the lumens of the corresponding first evaporation tubes 1.

[0075] In some embodiments, a fifth oil cooling pipeline 62 is provided inside the pipe wall of the second evaporation pipe 6. The fifth oil cooling pipeline 62 is arranged around the axial direction of the second evaporation pipe 6, and the fifth oil cooling pipeline 62 is communicated with the oil inlet 41.

[0076] As Figure 5 and Figure 12 shown, a fifth oil cooling pipeline 62 is provided inside the pipe wall of the second evaporation pipe 6. The fifth oil cooling pipeline 62 is an annular shape extending along the circumferential direction of the second evaporation pipe 6, and the fifth oil cooling pipeline 62 is located on the front side of the lumen of the second evaporation pipe 6. At least one of the four first evaporation pipes 1 is provided with an oil inlet pipeline 13 inside its pipe wall. The oil inlet pipeline 13 extends along the extending direction of the first evaporation pipe 1. Two oil inlets 41 are provided on the connecting bracket 4 connected to the first evaporation pipe 1. One of the oil inlets 41 is communicated with the lumen of the corresponding fuel injection pipe 5, and the other oil inlet 41 is communicated with one end of the oil inlet pipeline 13. The other end of the oil inlet pipeline 13 is communicated with the fifth oil cooling pipeline 62, and the fifth oil cooling pipeline 62 is also communicated with the lumen of the second evaporation pipe 6.

[0077] The ramjet engine of the embodiment of the present invention includes a combustion chamber flow path and an oil-cooled burner. The oil-cooled burner is the oil-cooled burner of the embodiment of the present invention, and the oil-cooled burner is arranged inside the combustion chamber flow path.

[0078] The ramjet engine of the embodiment of the present invention arranges the oil-cooled burner of the embodiment of the present invention in the combustion chamber flow path. By forming a blocking effect through the oil-cooled burner, the distortion of the oncoming flow can be effectively suppressed. At the same time, the distances between the first fuel injection port of the oil-cooled burner of the embodiment of the present invention and the first stabilizer skirt and the second stabilizer skirt are relatively short, which can reduce the mixing length of fuel and air, further improve the adaptability of the combustion chamber of the ramjet engine to the distorted oncoming flow, and improve the uniformity of the fuel concentration in the combustion zone of the ramjet engine. In addition, the lumen of the fuel injection pipe is communicated with the lumen of the first evaporation pipe, so that the fuel in the oil-cooled burner also serves as a cooling medium at the same time to cool the oil-cooled burner itself, which can effectively cool the oil-cooled burner. The fuel absorbs the heat of the oncoming air during the process of cooling the oil-cooled burner, increasing the temperature of the fuel itself. After the fuel is injected into the combustion zone, the initial temperature of fuel combustion can be increased to improve the combustion performance of the combustion chamber under low-pressure working conditions. Thus, the combustion chamber of the ramjet engine has the ability to work stably and efficiently under large distortion and low-pressure conditions. The oil-cooled burner of the embodiment of the present invention can enable the combustion chamber of the ramjet engine to adapt to the oncoming flow conditions with large distortion, and at the same time achieve efficient and stable combustion under low-pressure conditions below 0.6 atmospheres.

[0079] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the present invention.

[0080] In addition, the terms "first" and "second" are only used for distinction and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0081] In the present invention, unless otherwise clearly specified and limited, the terms "mounted", "connected", "connected to", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or communicable with each other; it may be directly connected, or indirectly connected through an intermediate medium, and may be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0082] In the present invention, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0083] In the present invention, the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0084] Although the above embodiments have been shown and described, it is to be understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions, and variations made by those of ordinary skill in the art to the above embodiments are within the scope of protection of the present invention.

Claims

1. An oil-cooled burner, characterized in that, it includes: A first evaporation tube, which extends in a straight line direction; A first stabilizer skirt, which is arranged at a radial end of the first evaporation tube, and the first stabilizer skirt extends from the first evaporation tube in a first direction; A second stabilizer skirt, which is arranged at the other radial end of the first evaporation tube, and the second stabilizer skirt extends from the first evaporation tube in the first direction; A connecting bracket, which is arranged on the first evaporation tube, and the connecting bracket extends from the first evaporation tube in a second direction, and the second direction is the reverse of the first direction; An oil injection pipe, which is arranged on the connecting bracket, and the oil injection pipe and the first evaporation tube are arranged at intervals in the second direction. The oil injection pipe is provided with a first oil injection port, the first oil injection port communicates with the lumen of the oil injection pipe, and the lumen of the oil injection pipe communicates with the lumen of the first evaporation tube; The connecting bracket is arranged at an axial end of the first evaporation tube. The connecting bracket is provided with an oil inlet and a connecting oil passage. The lumen of the oil injection pipe and / or the lumen of the first evaporation tube communicate with the oil inlet, and the connecting oil passage connects the lumen of the oil injection pipe with the lumen of the first evaporation tube; It further includes a second evaporation tube, which is arranged around the first direction and forms an air inlet by surrounding. The other axial end of the first evaporation tube is connected to the second evaporation tube, and the lumen of the first evaporation tube communicates with the lumen of the second evaporation tube. There are multiple first evaporation tubes, and the multiple first evaporation tubes are arranged at intervals along the circumferential direction of the second evaporation tube; There are multiple oil injection pipes, and the multiple oil injection pipes are arranged in one-to-one correspondence with the multiple first evaporation tubes, and the multiple oil injection pipes are connected. The oil injection port includes a second sub-port, the second sub-port is located at the connection of the multiple oil injection pipes, and the opening direction of the second sub-port faces the air inlet.

2. The oil-cooled burner according to claim 1, characterized in that, The first evaporation tube is provided with evaporation holes, the evaporation holes are located at one end of the first evaporation tube in the first direction, and the evaporation holes communicate with the inner cavity of the first evaporation tube. There are multiple evaporation holes, and the multiple evaporation holes are arranged at intervals along the extension direction of the first evaporation tube.

3. The oil-cooled burner according to claim 1, characterized in that, The first stabilizer skirt includes a first connecting portion and a first skirt portion. In the cross-section of the first evaporation tube, the projection of the first connecting portion extends in a direction orthogonal to the first direction, and the projection of the first skirt portion extends in the first direction. The first connecting portion is provided with first air holes, the first air holes penetrate through the first connecting portion along the first direction. There are multiple first air holes, and the multiple first air holes are arranged at intervals along the extension direction of the first evaporation tube; The second stabilizer skirt includes a second connecting portion and a second skirt portion. In the cross-section of the first evaporation tube, the projection of the second connecting portion extends in a direction orthogonal to the first direction, and the projection of the second skirt portion extends in the first direction. The second connecting portion is provided with second air holes, and the second air holes penetrate the second connecting portion along the first direction. The second air holes are multiple, and the multiple second air holes are arranged at intervals along the extending direction of the first evaporation tube. The first skirt portion and the second skirt portion extend in the first direction and are inclined in a relatively away direction.

4. The oil-cooled burner according to claim 1, wherein, a first oil-cooling pipeline is provided inside the pipe wall of the fuel injection pipe, the first oil-cooling pipeline extends along the extending direction of the fuel injection pipe, and the first oil-cooling pipeline is located on one side of the lumen of the fuel injection pipe in the second direction. The first oil-cooling pipeline is communicated with the connecting oil passage. The first fuel injection port includes a first sub-port, and the opening direction of the first sub-port is orthogonal to the extending direction of the fuel injection pipe and the first direction. The first sub-ports are multiple, and the multiple first sub-ports are arranged at intervals along the extending direction of the fuel injection pipe. The first sub-port is communicated with the lumen of the fuel injection pipe and / or the first oil-cooling pipeline.

5. The oil-cooled burner according to claim 1, wherein, a second oil-cooling pipeline is provided inside the pipe wall of the first evaporation tube, the second oil-cooling pipeline extends along the extending direction of the first evaporation tube, and the second oil-cooling pipeline is communicated with the connecting oil passage.

6. The oil-cooled burner according to claim 1, wherein, a third oil-cooling pipeline and a fourth oil-cooling pipeline are provided inside both the first stabilizer skirt and the second stabilizer skirt. The third oil-cooling pipeline extends along the extending direction of the first evaporation tube, and the fourth oil-cooling pipeline extends along the first direction. The fourth oil-cooling pipeline communicates the third oil-cooling pipeline with the connecting oil passage.

7. The oil-cooled burner according to claim 1, wherein, second fuel injection ports are provided on the inner peripheral surface of the second evaporation tube forming the air inlet. The second fuel injection ports are multiple, and the multiple second fuel injection ports are in one-to-one correspondence and communication with the lumens of the multiple first evaporation tubes; and / or a fifth oil-cooling pipeline is provided inside the pipe wall of the second evaporation tube, the fifth oil-cooling pipeline is arranged around the axial direction of the second evaporation tube, and the fifth oil-cooling pipeline is communicated with the oil inlet.

8. A ramjet engine, wherein, it includes a combustion chamber flow channel and an oil-cooled burner. The oil-cooled burner is the oil-cooled burner according to any one of claims 1-7, and the oil-cooled burner is arranged inside the combustion chamber flow channel.

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