Radial flow combustion chamber

Abstract

The invention discloses a radial flow combustion chamber which comprises a combustion chamber casing. The flame tube is arranged in the combustion chamber casing, a gap is formed between the outer wall of the flame tube and the inner wall of the combustion chamber casing, and two channels of the combustion chamber are formed; a plurality of through hole groups are formed in the flame tube and are suitable for communicating the inner cavity of the flame tube with the two channels of the combustion chamber; the fuel injection structure is arranged on the flame tube; an outlet of the diffuser is communicated with the two channels of the combustion chamber; the diffuser inputs air flow into the two channels of the combustion chamber, the air flow of the two channels of the combustion chamber flows to the flame tube from outside to inside in the radial direction, and gas flow in the flame tube flows from inside to outside in the radial direction. The whole combustion chamber is compact in structure, short in axial size and light in weight; the combustion chamber is simple in structure, few in parts and low in cost. Air and fuel gas flow in opposite directions, so that the airflow speed can be reduced, the residence time can be prolonged, and sufficient mixing and combustion of fuel oil and air can be ensured.

Description

Technical Field

[0001] The present invention relates to the field of gas turbine engines, and in particular to a radial flow combustion chamber. Background Art

[0002] Gas turbine engine combustors primarily have four configurations: direct flow, recirculating flow, baffled flow, and radial flow. These configurations have been widely used in gas turbine engines due to their distinct characteristics. However, existing radial flow combustors are less commonly used in gas turbine engines due to their large size, complex structure, and limited practicality.

[0003] The Chinese invention patent with the authorization announcement number CN107339712B discloses a radial flow combustion chamber. According to the content of the patent, the combustion chamber is mainly composed of a diffuser, a combustion chamber casing, a flame tube and a fuel nozzle. The two-channel airflow of the combustion chamber of this configuration structure is consistent with the flow direction of the gas in the flame tube, both from the outside to the inside. Compared with the direct flow or recirculating flow combustion chamber, the circumference of the circle formed by the flame tube head of the radial flow combustion chamber is larger. In order to ensure that the combustion chamber has good ignition flame and outlet temperature distribution and other performance, it is necessary to increase the number of heads (i.e., the number of fuel nozzles). This greatly increases the number of parts of the combustion chamber and the complexity of the fuel supply system, thereby increasing the weight and cost of the combustion chamber. Summary of the Invention

[0004] In view of this, the present invention provides a radial flow combustion chamber to solve the problems of the current radial flow combustion chamber, such as complex structure, heavy weight, high cost and poor practicality.

[0005] The present invention provides a radial flow combustion chamber, comprising:

[0006] combustion chamber casing;

[0007] A flame tube is disposed inside the combustion chamber casing, with a distance between the outer wall of the flame tube and the inner wall of the combustion chamber casing to form two combustion chamber channels; a plurality of through-hole groups are formed on the flame tube, and the through-hole groups are suitable for connecting the inner cavity of the flame tube with the two combustion chamber channels;

[0008] A fuel injection structure is provided on the flame tube, and the fuel injection structure is suitable for injecting fuel into the inner cavity of the flame tube;

[0009] A diffuser is provided on the combustion chamber casing, wherein the outlet of the diffuser is connected to the two passages of the combustion chamber;

[0010] The diffuser introduces air flow into the two channels of the combustion chamber. The air flow in the two channels of the combustion chamber flows radially from outside to inside to the flame tube, which is opposite to the direction of the gas flow flowing radially from inside to outside in the flame tube.

[0011] The beneficial effects of the radial flow combustor are as follows: air entering the combustor's two channels flows radially from outside to inside, while the combustion gas within the flame tube flows radially from inside to outside, with the two airflows flowing in opposite directions. The main advantages include: first, it is insensitive to the Mach number and airflow angle of the diffuser outlet airflow, significantly expanding the combustor's adaptability to the diffuser outlet Mach number, reducing the stringent requirements for aerodynamic design, and achieving a wide range of stable operation; second, it reduces airflow velocity, increases residence time, and prolongs the mixing and combustion time of the fuel and air within the flame tube, ensuring sufficient mixing and combustion of the fuel and air, facilitating combustion organization, and improving efficiency.

[0012] Due to the large circumference of the flame tube head, the traditional radial flow combustion chamber needs to increase the number of nozzles to ensure flame connection and temperature uniformity; the present invention strengthens the combustion organization through reverse flow, reduces dependence on the number of nozzles, reduces the total number of parts, and reduces system complexity and manufacturing costs.

[0013] In an optional embodiment, the combustion chamber casing includes an outer combustion chamber casing, a front combustion chamber casing, and a rear combustion chamber casing. The front combustion chamber casing is arranged at the front end of the outer combustion chamber casing, and the rear combustion chamber casing is arranged at the rear end of the outer combustion chamber casing. The front combustion chamber casing has an axial support arm, and there is a distance between the axial support arm and the outer combustion chamber casing to form a diffuser channel. The diffuser is arranged in the diffuser channel.

[0014] In an optional embodiment, the flame tube has a flame tube front wall and a flame tube rear wall, and the flame tube front wall is fixed to the combustion chamber casing through a flame tube front wall mounting seat.

[0015] In an optional embodiment, the through hole group includes a first through hole group provided on the front wall of the flame liner and a second through hole group provided on the rear wall of the flame liner;

[0016] The first through hole group includes a first initial air film groove, a first main combustion hole, a first diverging hole and a mixing hole arranged on the front wall of the flame tube, the first initial air film groove is arranged inwardly relative to the first main combustion hole, the first diverging hole and the mixing hole, and the output port of the first initial air film groove is arranged close to the wall surface of the front wall of the flame tube;

[0017] The second through hole group includes a second initial air film groove, a second main combustion hole, and a second diverging hole arranged on the rear wall of the flame tube. The second initial air film groove is arranged inwardly relative to the second main combustion hole and the second diverging hole, and the output port of the second initial air film groove is arranged against the wall surface of the rear wall of the flame tube.

[0018] In an optional embodiment, a flange structure is provided on the inner wall of the front wall of the flame tube and extends toward the inner cavity of the flame tube, and the mixing hole is provided on the flange structure.

[0019] In an optional embodiment, the fuel injection structure includes:

[0020] An oil slinger is provided on the high-pressure rotor of the engine and rotates synchronously with the high-pressure rotor of the engine. The oil slinger extends into the inner cavity of the flame tube and is provided with a plurality of oil slinging holes. The oil slinger is suitable for utilizing the centrifugal force generated by the rotation of the high-pressure rotor of the engine to sling the fuel through the oil slinging holes into the flame tube and realize atomization.

[0021] The oil injection passage is communicated with the oil slinger pan, and the oil injection passage is suitable for supplying fuel to the oil slinger pan.

[0022] In an optional embodiment, the injection oil passage includes a pipeline portion and an injection seat body communicating with each other, the injection seat body being arranged on the periphery of the engine high-pressure rotor; an oil outlet hole is provided at the rear end of the injection seat body, and the oil slingering plate movable seal is arranged on the periphery of the injection seat body and communicates with the oil outlet hole on the injection seat body;

[0023] The inner side of the injection seat body is provided with sealing grate teeth to seal the two channels of the combustion chamber.

[0024] In an optional embodiment, the oil flinger pan is provided with an oil flinger pan inner ring and an oil flinger pan outer ring, the oil flinger pan inner ring and the oil flinger pan outer ring are arranged to form an oil flow groove, the oil flinger pan inner ring is in contact with the rear end of the sealing grate teeth, and the oil flinger pan outer ring is in contact with the outer wall of the injection seat body, the oil flinger pan inner ring, the injection seat body, the sealing grate teeth and the oil flinger pan outer ring are arranged to form an oil flow cavity, and the oil flow cavity is connected to the oil flinging hole.

[0025] In an optional embodiment, a first cavity is formed between the flame tube front wall mounting seat and the injection seat body, and a first air inlet hole is provided on the flame tube front wall mounting seat, and the first air inlet hole is communicated with the first cavity.

[0026] In an optional embodiment, a second cavity is provided between the injection seat body and the sealing grate teeth, and a second air inlet is provided on the injection seat body, and the second air inlet communicates with the first cavity and the second cavity.

[0027] In an optional embodiment, the injection oil channel is arranged inside the high-pressure rotor of the engine.

[0028] In summary, the technical solution of the present invention has the following advantages:

[0029] The entire combustion chamber of the present invention has a compact structure, a short axial dimension, and a light weight; the combustion chamber has a simple structure, a small number of parts, and a low cost.

[0030] The present invention adopts a reverse flow mode for air and gas, which can reduce airflow velocity, increase residence time, and ensure that fuel and air are fully mixed and burned. The combustion chamber of the present invention is insensitive to the Mach number and airflow angle of the diffuser outlet, and has a wide stable operating range.

[0031] The flame tube of the present invention has a small surface area, which can greatly reduce the amount of cooling gas used and is suitable for combustion chambers with higher temperature rises.

[0032] The present invention adopts the oil supply mode of injection oil channel + centrifugal oil throwing plate, which has good fuel atomization quality, low oil supply pressure and simple system structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0034] Figure 1 A schematic structural diagram of a radial flow combustion chamber provided by the present invention;

[0035] Figure 2 A schematic diagram of the airflow direction of the radial flow combustion chamber provided by the present invention;

[0036] Figure 3 A schematic diagram of the connection between the outer casing of the combustion chamber and the front casing of the combustion chamber in the radial flow combustion chamber provided by the present invention;

[0037] Figure 4 A schematic structural diagram of a flame tube of a radial flow combustion chamber provided by the present invention;

[0038] Figure 5 A schematic diagram of the connection structure of the flame tube front wall mounting seat, the injection seat body and the oil slingering plate of the radial flow combustion chamber provided in Example 1 of the present invention;

[0039] Figure 6 A schematic diagram of the connection structure between the pipeline portion and the injection seat body of the radial flow combustion chamber provided in Example 1 of the present invention;

[0040] Figure 7 A cross-sectional view of a duct portion of a radial flow combustion chamber provided in Example 1 of the present invention;

[0041] Figure 8 Schematic diagram of the connection between the injection oil passage, oil slinger plate and the high-pressure rotor of the engine of the radial flow combustion chamber provided in Example 1 of the present invention.

[0042] Description of reference numerals:

[0043] 1. Flame tube front wall, 101. First initial air film groove, 102. First main combustion hole, 103. First diverging hole, 104. Mixing hole, 105. Flanging structure, 2. Flame tube rear wall, 201. Second initial air film groove, 202. Second main combustion hole, 203. Second diverging hole, 3. Flame tube front wall mounting seat, 301. First air inlet hole, 302. First cavity, 4. Combustion chamber outer casing, 5. Combustion chamber front casing, 501. Axial support arm, 6 , injection oil channel, 61, pipeline part, 62, injection seat body, 601, second air inlet hole, 602, elliptical fuel inlet hole, 603, fuel distribution chamber, 604, oil outlet hole, 7, oil slinging plate, 701, oil slinging hole, 702, oil slinging plate inner ring, 703, oil slinging plate outer ring, 704, oil passage chamber, 8, sealing grate teeth, 81, second cavity, 9, high-pressure turbine guide vane, 10, diffuser, 11, two channels of combustion chamber, 12, engine high-pressure rotor. DETAILED DESCRIPTION

[0044] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts shall fall within the scope of protection of the present invention.

[0045] The Chinese invention patent with the authorization announcement number CN107339712B discloses a radial flow combustion chamber. According to the content of the patent, the combustion chamber is mainly composed of a diffuser, a combustion chamber casing, a flame tube and a fuel nozzle. The two-channel airflow of the combustion chamber of this configuration structure is consistent with the flow direction of the gas in the flame tube, both from the outside to the inside. Compared with the direct current or recirculation combustion chamber, the circumference of the circle formed by the flame tube head of the radial flow combustion chamber is larger. When the circumference is large, a single head may not be able to effectively cover the entire circumferential area, resulting in a long flame propagation distance and an increased risk of flameout. In order to ensure that the combustion chamber has good ignition flame and outlet temperature distribution and other properties, it is necessary to increase the number of heads (i.e. the number of fuel nozzles), shorten the flame distance, and form a stable fire source network through multi-point flame connection. This greatly increases the number of parts of the combustion chamber and the complexity of the fuel supply system, thereby increasing the weight and cost of the combustion chamber.

[0046] Based on this, the present invention provides a radial flow combustion chamber with good aerodynamic performance, simple structure, low cost and strong practicality, aiming to solve the problems of complex structure, heavy weight, high cost and poor practicality of the combustion chamber.

[0047] Example 1

[0048] According to an embodiment of the present invention, a radial flow combustion chamber is provided, Figures 1 to 7 As shown, it includes a combustion chamber casing, a flame tube, a fuel injection structure and a diffuser 10.

[0049] The flame tube is arranged inside the combustion chamber casing, and there is a distance between the outer wall of the flame tube and the inner wall of the combustion chamber casing to form two combustion chamber channels 11. The flame tube is provided with a plurality of through hole groups, which are suitable for connecting the flame tube cavity and the two combustion chamber channels 11.

[0050] The fuel injection structure is arranged on the flame tube, and is suitable for injecting fuel into the inner cavity of the flame tube.

[0051] The diffuser 10 is arranged on the combustion chamber casing, and the outlet of the diffuser 10 is communicated with the two passages 11 of the combustion chamber.

[0052] The diffuser 10 inputs the air flow into the two channels 11 of the combustion chamber. The air flow in the two channels 11 of the combustion chamber flows radially from outside to inside to the flame tube, and the gas flow in the flame tube flows radially from inside to outside.

[0053] The radial flow combustion chamber, such as Figure 2 As shown, the air flow entering the two channels 11 of the combustion chamber flows radially from the outside to the inside, while the gas in the flame tube flows radially from the inside to the outside, with the two airflows flowing in opposite directions. The main advantages are: first, it is insensitive to the Mach number and airflow angle of the airflow at the outlet of the diffuser 10 (the numerical value - Mach number of conventional combustion chambers is generally 0.10 to 0.15, while the numerical value - Mach number that can be achieved by the present invention can reach 0.25 to 0.30), which greatly expands the combustion chamber's adaptability to the diffuser outlet Mach number, reduces the stringent requirements of aerodynamic design, and has a wide stable operating range; second, it can reduce the airflow velocity, increase the residence time, and extend the mixing and combustion time of the fuel and air in the flame tube, ensuring that the fuel and air are fully mixed and burned, facilitating combustion organization and improving efficiency.

[0054] Due to the large circumference of the flame tube head, the traditional radial flow combustion chamber needs to increase the number of nozzles to ensure flame connection and temperature uniformity; the present invention strengthens the combustion organization through reverse flow, reduces dependence on the number of nozzles, reduces the total number of parts, and reduces system complexity and manufacturing costs.

[0055] In some embodiments, the combustion chamber casing includes an outer combustion chamber casing 4, a front combustion chamber casing 5, and a rear combustion chamber casing. The front combustion chamber casing 5 is arranged at the front end of the outer combustion chamber casing 4, and the rear combustion chamber casing is arranged at the rear end of the outer combustion chamber casing 4. Figure 3 As shown, the combustion chamber front casing 5 has an axial support arm 501 , and a distance is provided between the axial support arm 501 and the combustion chamber outer casing 4 to form a diffuser channel, and the diffuser 10 is arranged in the diffuser channel.

[0056] In some embodiments, the flame tube has a flame tube front wall 1 and a flame tube rear wall 2. The flame tube front wall 1 and the flame tube front wall mounting base 3 are connected together by welding and are installed on the combustion chamber front casing 5 together with the injection oil channel 6 by bolt connection.

[0057] The flame liner's outlet is also equipped with a high-pressure turbine guide 9, which directs the flow of high-temperature, high-pressure combustion gas at the combustion chamber's outlet to an angle suitable for the operation of the turbine rotor blades. The outlet end of the flame liner's front wall 1 and the outer ring of the high-pressure turbine guide 9 are mounted with a gap-lap fit. The flame liner's rear wall 2 and the high-pressure turbine guide 9 are welded together, and the outlet end of the flame liner's rear wall 2 and the inner ring of the high-pressure turbine guide 9 are mounted with a gap-lap fit.

[0058] In some embodiments, the through-hole group includes a first through-hole group disposed on the front wall 1 of the flame liner and a second through-hole group disposed on the rear wall 2 of the flame liner.

[0059] like Figure 4 As shown, the first through hole group includes a first initial air film groove 101, a first main combustion hole 102, a first diverging hole 103 and a mixing hole 104 arranged on the front wall 1 of the flame tube. A plurality of first diverging holes 103 can be provided, which are arranged at intervals on the front wall 1 of the flame tube. The first initial air film groove 101 is arranged inwardly relative to the first main combustion hole 102, the first diverging hole 103 and the mixing hole 104, and the output port of the first initial air film groove 101 is arranged close to the wall surface of the front wall of the flame tube, so that the air flow input from the first initial air film groove 101 to the inner cavity of the flame tube flows along the wall surface of the flame tube, which can ensure that under the influence of the wall-adhering cooling airflow formed by the first initial air film groove 101, the high-speed cooling airflow ejected by the first diverging hole 103 has better wall adhesion, thereby improving the cooling effect and reducing the number of the first diverging holes.

[0060] like Figure 4 As shown, the second through hole group includes a second initial air film groove 201, a second main combustion hole 202, and a second diverging hole 203 arranged on the rear wall 2 of the flame tube. The second initial air film groove 201 is arranged inwardly relative to the second main combustion hole 202 and the second diverging hole 203, and the output port of the second initial air film groove 201 is arranged close to the wall surface of the rear wall of the flame tube, so that the air flow input into the inner cavity of the flame tube by the second initial air film groove 201 flows along the wall surface of the flame tube, which can ensure that under the influence of the wall-adhering cooling airflow formed by the second initial air film groove 201, the high-speed cooling airflow ejected by the second diverging hole 203 has better wall adhesion, improves the cooling effect, and reduces the number of second diverging holes.

[0061] A flange structure 105 is provided on the inner wall of the flame liner front wall 1, extending into the flame liner inner cavity, and the mixing hole 104 is provided on the flange structure 105. In this embodiment, the flange structure 105 not only improves the flow coefficient of the mixing hole and increases the penetration depth, but also enhances the rigidity of the flame liner front wall 1.

[0062] In some embodiments, the fuel injection structure includes an oil slinger 7 and an injection oil channel 6. The combustion chamber adopts an injection oil channel + centrifugal oil slinger oil supply method, which has good fuel atomization quality, low fuel supply pressure and simple system structure.

[0063] The oil slinger pan 7 is located between the front wall 1 and the rear wall 2 of the flame tube, extending into the inner cavity of the flame tube. The oil slinger pan 7 is provided with multiple oil slinger holes 701. The oil slinger pan 7 is mounted on the engine's high-pressure rotor and rotates synchronously with the engine's high-pressure rotor at high speed. The centrifugal force generated by the rotation of the engine's high-pressure rotor is used to sling fuel through the oil slinger holes 701 into the flame tube, achieving atomization.

[0064] The oil injection passage 6 is communicated with the oil slinger pan 7 , and the oil injection passage 6 is suitable for supplying fuel to the oil slinger pan 7 .

[0065] In some embodiments, the injection oil passage 6 includes a conduit 61 and an injection seat 62. One end of the conduit 61 communicates with the oil supply system, and the other end of the conduit 61 communicates with the injection seat 62, which is positioned around the engine's high-pressure rotor. An oil outlet is provided at the rear end of the injection seat 62. A movable seal sleeve for the oil slinger 7 is positioned around the injection seat 62 and communicates with the outlet on the injection seat 62, allowing the injection oil passage 6 to transfer fuel to the oil slinger 7.

[0066] To seal the combustion chamber's two channels 11, a sealing grate 8 is provided on the inner side of the injection seat 62. The outer wall of the sealing grate 8 is provided with a plurality of small teeth. These small teeth can increase the contact area between the sealing grate 8 and adjacent components, thereby improving the sealing effect and preventing gas leakage in the combustion chamber's two channels 11.

[0067] The oil-slinging pan 7 is provided with an inner ring 702 and an outer ring 703 of the oil-slinging pan. The inner ring 702 and the outer ring 703 of the oil-slinging pan are arranged to form an oil groove. The left end face of the inner ring 702 of the oil-slinging pan is in movable sealing contact with the rear end face of the sealing grate 8. The outer ring 703 of the oil-slinging pan is radially extended and arranged on the periphery of the inner ring 702 of the oil-slinging pan. The outer ring 703 of the oil-slinging pan is in movable sealing contact with the outer wall of the injection seat body 62. The inner ring 702 of the oil-slinging pan, the injection seat body 62, the sealing grate 8 and the outer ring 703 of the oil-slinging pan are arranged to form an oil chamber 704. The oil chamber 704 is connected to the oil-slinging hole 701. In this embodiment, the injection oil channel 6 does not rotate with the engine's high-pressure rotor, but the oil slinger plate 7 rotates with the engine's high-pressure rotor. When the oil slinger plate 7 rotates, the injection oil channel 6 can transfer the fuel to the oil passage chamber 704, and further transfer the fuel to the oil slinger hole 701 through the oil passage chamber 704, thereby having the function of supplying oil to the moving oil slinger plate 7.

[0068] In some embodiments, as Figure 5 As shown, a first cavity 302 is formed between the flame liner front wall mounting base 3 and the injection base body 62. A first air inlet 301 is provided on the flame liner front wall mounting base 3, which communicates with the first cavity 302. High-pressure gas entering between the flame liner front wall 1 and the combustion chamber front casing 5 through the diffuser enters the first cavity 302 formed by the flame liner front wall mounting base 3 and the injection oil passage 6 through the first air inlet 301 on the flame liner front wall mounting base 3. This seals the high-temperature combustion gas within the flame liner and prevents backflow. This high-pressure gas also seals the fuel in the oil slinger pan 7.

[0069] In some embodiments, as Figure 5 As shown, a second cavity 81 is provided between the injection seat 62 and the sealing grate 8. A second air inlet hole 601 is provided on the injection seat 62. The second air inlet hole 601 communicates with the first cavity 302 and the second cavity 81. The high-pressure gas that enters the second cavity formed by the flame tube front wall mounting seat 3 and the injection oil passage 6 through the first air inlet hole 301 on the flame tube front wall mounting seat 3 can then enter the sealing grate 8 mounted on the engine high-pressure rotor through the second air inlet hole 601, thereby sealing the fuel on the left end surface of the inner ring of the oil slinger.

[0070] like Figure 6 and Figure 7 As shown, the injection oil passage 6 is also designed with an elliptical fuel inlet hole 602, a fuel distribution cavity 603, and an oil outlet hole 604. The fuel entering the injection oil passage 6 enters the fuel distribution cavity 603 through the elliptical fuel inlet hole 602, and then enters the oil passage cavity of the oil slinger 7 through the oil outlet hole 604.

[0071] Example 2

[0072] This embodiment provides a radial flow combustion chamber based on the embodiment 1. This embodiment modifies the structure of the injection oil passage 6. The injection oil passage 6 of this embodiment is directly arranged inside the high-pressure rotor 12 of the engine. Figure 8 As shown, the rotor center forms a fuel flow channel, through which fuel flows into the oil passage chamber of the oil slinger plate 7 and is then slinged into the flame tube through oil slinger holes. Compared to Example 1, this embodiment omits the piping, injection seat, and other structures, simplifying the radial flow combustion chamber structure and reducing manufacturing costs. Furthermore, because the injection oil channel 6 is located directly within the engine's high-pressure rotor, the fuel flow path is shortened and fuel supply is more direct, which improves fuel injection and combustion efficiency.

[0073] According to numerical simulation analysis, the temperature field at the combustion chamber outlet is uniform and the technical solution is feasible.

[0074] Although the embodiments of the present invention have been described with reference to the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention. Such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A radial flow combustion chamber, characterized in that: include: combustion chamber casing; A flame tube is arranged inside the combustion chamber casing, with a distance between the outer wall of the flame tube and the inner wall of the combustion chamber casing to form two combustion chamber channels (11); a plurality of through hole groups are opened on the flame tube, and the through hole groups are suitable for connecting the inner cavity of the flame tube and the two combustion chamber channels (11); A fuel injection structure is provided on the flame tube, and the fuel injection structure is suitable for injecting fuel into the inner cavity of the flame tube; A diffuser (10) is arranged on the combustion chamber casing, and an outlet of the diffuser (10) is communicated with two channels (11) of the combustion chamber; The diffuser (10) introduces air flow into the two channels (11) of the combustion chamber. The air flow in the two channels (11) of the combustion chamber flows radially from outside to inside to the flame tube, which is opposite to the direction of the gas flow flowing radially from inside to outside in the flame tube.

2. The radial flow combustion chamber according to claim 1, characterized in that The combustion chamber casing comprises an outer combustion chamber casing (4), a front combustion chamber casing (5), and a rear combustion chamber casing. The front combustion chamber casing (5) is arranged at the front end of the outer combustion chamber casing (4), and the rear combustion chamber casing is arranged at the rear end of the outer combustion chamber casing (4). The front combustion chamber casing (5) has an axial support arm (501). A distance is provided between the axial support arm (501) and the outer combustion chamber casing (4) to form a diffuser channel. The diffuser (10) is arranged in the diffuser channel.

3. The radial flow combustion chamber according to claim 1, characterized in that The flame tube comprises a flame tube front wall (1) and a flame tube rear wall (2); the flame tube front wall (1) is fixed on the combustion chamber casing via a flame tube front wall mounting seat (3).

4. The radial flow combustion chamber according to claim 3, characterized in that The through hole group comprises a first through hole group arranged on the front wall (1) of the flame tube and a second through hole group arranged on the rear wall (2) of the flame tube; The first through hole group comprises a first initial air film groove (101), a first main combustion hole (102), a first diverging hole (103) and a mixing hole (104) arranged on the front wall of the flame tube (1); the first initial air film groove (101) is arranged inward relative to the first main combustion hole (102), the first diverging hole (103) and the mixing hole (104); and the output port of the first initial air film groove (101) is arranged close to the wall surface of the front wall of the flame tube; The second through hole group includes a second initial air film groove (201), a second main combustion hole (202), and a second diverging hole (203) arranged on the rear wall (2) of the flame tube. The second initial air film groove (201) is arranged inwardly relative to the second main combustion hole (202) and the second diverging hole (203), and the output port of the second initial air film groove (201) is arranged close to the wall surface of the rear wall of the flame tube.

5. The radial flow combustion chamber according to claim 4, characterized in that A flange structure (105) is provided on the inner wall of the flame tube front wall (1) and extends toward the inner cavity of the flame tube, and the mixing hole (104) is provided on the flange structure (105).

6. The radial flow combustor according to claim 3, characterized in that The fuel injection structure includes: An oil-slinging plate (7) is provided on the high-pressure rotor of the engine and rotates synchronously with the high-pressure rotor of the engine. The oil-slinging plate (7) extends into the inner cavity of the flame tube. A plurality of oil-slinging holes (701) are provided on the oil-slinging plate (7). The oil-slinging plate (7) is suitable for utilizing the centrifugal force generated by the rotation of the high-pressure rotor of the engine to throw the fuel into the flame tube through the oil-slinging holes (701) and realize atomization. The injection oil passage (6) is communicated with the oil slinger pan (7), and the injection oil passage (6) is suitable for supplying fuel to the oil slinger pan (7).

7. The radial flow combustor according to claim 6, characterized in that The injection oil passage (6) comprises a pipeline portion (61) and an injection seat body (62) communicating with each other, wherein the injection seat body (62) is arranged on the periphery of the high-pressure rotor of the engine; an oil outlet hole is provided at the rear end of the injection seat body (62); the oil slinger plate (7) is provided with a movable sealing sleeve on the periphery of the injection seat body (62) and communicates with the oil outlet hole on the injection seat body (62); The inner side of the injection seat body (62) is provided with sealing grate teeth (8) to seal the two channels (11) of the combustion chamber.

8. The radial flow combustor according to claim 7, characterized in that The oil-slinging plate (7) is provided with an inner ring (702) and an outer ring (703) of the oil-slinging plate. The inner ring (702) and the outer ring (703) of the oil-slinging plate are arranged to form an oil-passing groove. The inner ring (702) of the oil-slinging plate abuts against the rear end of the sealing grate (8). The outer ring (703) of the oil-slinging plate abuts against the outer wall of the injection seat (62). The inner ring (702) of the oil-slinging plate, the injection seat (62), the sealing grate (8), and the outer ring (703) of the oil-slinging plate are arranged to form an oil-passing cavity (704). The oil-passing cavity (704) is communicated with the oil-slinging hole (701).

9. The radial flow combustor according to claim 7, characterized in that A first cavity (302) is formed between the flame tube front wall mounting seat (3) and the injection seat body (62), and a first air inlet hole (301) is provided on the flame tube front wall mounting seat (3), and the first air inlet hole (301) is communicated with the first cavity (302); A second cavity (81) is provided between the injection seat (62) and the sealing grate teeth (8), and a second air inlet (601) is provided on the injection seat (62). The second air inlet (601) communicates with the first cavity (302) and the second cavity (81).

10. The radial flow combustor according to claim 6, characterized in that The injection oil passage (6) is arranged inside the high-pressure rotor of the engine.

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