An integrated flame holder with a boss in the trailing edge cavity

Abstract

The application provides an integrated flame stabilizer with a boss in a trailing edge cavity, which comprises a flame stabilizer, an oil injection rod, a cooling gas inlet pipe, a trailing edge wing plate and a trailing edge boss. In one aspect, the trailing edge cavity is formed downstream of the rear side plate of the flame stabilizer by the trailing edge wing plate, and the trailing edge boss is arranged on the rear side plate, so that the cooling vortex is formed in the trailing edge cavity by the trailing edge boss, the rear side plate and the cooling gas holes arranged on the trailing edge wing plate, the flame stabilizer is isolated from the backflow area downstream of the flame stabilizer, the heat load of the flame stabilizer is reduced, and the thermal ablation problem is avoided; meanwhile, the cooling method has little influence on the backflow area behind the stabilizer, and the flame stabilizing function of the flame stabilizer is not damaged. In another aspect, the cooling gas can also cool the oil injection rod after entering the inside of the flame stabilizer, so that the coking problem of the oil injection rod is solved.

Description

Technical Field

[0001] This invention belongs to the field of aero-engines and relates to an integrated afterburner, specifically an integrated flame stabilizer with a boss in the trailing edge cavity. Background Technology

[0002] An afterburner is a device used during aircraft takeoff, brief acceleration, and supersonic flight to briefly increase the maximum thrust of an aircraft engine, significantly improving the engine's thrust-to-weight ratio. However, in a traditional afterburner, each internal component exists independently and operates autonomously, resulting in a longer and heavier afterburner. Furthermore, due to the stabilizer blocking the internal channels, it suffers significant "cold-state" losses in non-afterburning conditions.

[0003] In addition, with the improved performance of new-generation engines, the temperature rise in the main combustion chamber has increased, the turbine inlet temperature of the combustion gas has risen significantly, and the inlet temperature of the afterburner is even higher, leading to several problems. First, the higher incoming flow temperature increases the risk of fuel auto-ignition and coking. Second, the extremely high temperature in the recirculation zone, which acts as the ignition source, will impose a significant thermal load on the nearest stabilizer tail edge, potentially causing thermal erosion of the stabilizer. Therefore, it is necessary to design the stabilizer with an integrated injection / stabilization / cooling system to improve its service life, and the introduction of cooling air should be considered to minimize interference with the recirculation zone behind the stabilizer, reducing its impact on flame stabilization performance.

[0004] Chinese patent CN202311340500.5 discloses an integrated flame stabilizer with a trailing edge cavity. It achieves a cooling effect by constructing a trailing edge cavity behind the stabilizer and using cooling vortices to isolate the trailing edge of the stabilizer from the rear recirculation area. However, the applicant found some shortcomings in this patented technology: the cooling method of the cooling vortex is relatively simple and does not adequately cool the trailing edge wall of the stabilizer; furthermore, the location of the cooling channels is relatively limited, and the control over the shape of the cooling vortex is insufficient. Summary of the Invention

[0005] In view of this, the present invention provides an integrated flame stabilizer with a boss in the trailing edge cavity, which can integrate fuel injection, flame stabilization and cooling, and flexibly control the cooling vortex in the trailing edge cavity, effectively reducing the risk of fuel auto-ignition, coking and stabilizer thermal erosion, while having less interference with the backflow zone behind the stabilizer.

[0006] This invention provides an integrated flame stabilizer with a boss provided in the trailing edge cavity, characterized in that it comprises:

[0007] The flame stabilizer includes a flame stabilizer front edge, circumferential side plate, front partition plate, rear side plate and radial side plate, and forms an interconnected oil-gas mixing chamber and cooling gas chamber inside, and a reflux zone outside downstream.

[0008] The fuel injector is connected to the interior of the fuel-air mixing chamber;

[0009] A cooling air inlet pipe is connected to the interior of the cooling air chamber;

[0010] Trailing edge wing plates are disposed on the rear side of the flame stabilizer and extend rearward from the rear ends of the two circumferential side plates respectively, thereby forming a trailing edge cavity between the two trailing edge wing plates;

[0011] A trailing edge boss is provided on the rear side plate and is located between the two trailing edge wing plates;

[0012] The trailing edge wing and the trailing edge boss are both hollow structures that communicate with the cooling air cavity. Multiple cooling air holes are provided on the trailing edge boss and the rear side plate, or on the trailing edge boss and the trailing edge wing, so that cooling vortices are formed on both sides of the trailing edge boss in the circumferential direction within the trailing edge cavity, thereby separating the flame stabilizer from the recirculation zone.

[0013] Preferably, the trailing edge wing plate has a first cooling hole on its rear end face that sprays cooling air in a direction parallel to the flow direction.

[0014] Preferably, when the height of the trailing edge boss is between 1 / 5 and 1 / 2 of the flow length of the trailing edge cavity, the cooling vent includes a second cooling vent located on the circumferential sidewall of the trailing edge boss and a third cooling vent located on the rear side plate.

[0015] Preferably, the second cooling hole is disposed on the side of the circumferential sidewall of the trailing edge boss near the rear side plate, and a plurality of the second cooling holes are arranged radially evenly and configured such that the airflow direction at the outlet is perpendicular to the flow direction.

[0016] Preferably, the third cooling hole is disposed on the side of the rear side plate near the trailing edge wing, and the plurality of the third cooling holes are arranged evenly in the radial direction and configured such that the airflow direction at the outlet is parallel to the extension direction of the trailing edge wing.

[0017] Preferably, when the height of the trailing edge boss is between 1 / 2 and 4 / 5 of the flow length of the trailing edge cavity, the cooling vents include a fourth cooling vent located on the circumferential sidewall of the trailing edge boss and a fifth cooling vent located on the trailing edge wingplate.

[0018] Preferably, the fourth cooling hole is located on the side of the circumferential sidewall of the trailing edge boss away from the rear side plate, and the plurality of the fourth cooling holes are arranged evenly in the radial direction and configured such that the airflow direction at the outlet is perpendicular to the flow direction.

[0019] Preferably, the fifth cooling hole is disposed on the side of the trailing edge wing near the rear side plate, and the plurality of fifth cooling holes are arranged radially evenly and configured such that the airflow direction at the outlet is perpendicular to the extension direction of the trailing edge wing.

[0020] Preferably, the rear side plate and the tail edge boss are formed by bending a whole plate multiple times, wherein the plate surface constituting the rear side plate is arranged perpendicular to the flow direction, the circumferential side of the tail edge boss is arranged along the flow direction, and the rear side of the tail edge boss is arranged perpendicular to the flow direction.

[0021] Preferably, the integrated flame stabilizer with a boss in the trailing edge cavity further includes:

[0022] The rear impact baffle is located on the front side of the rear side plate of the flame stabilizer, and has multiple impact vents.

[0023] Based on this, on the one hand, the present invention utilizes a trailing edge wing plate to form a trailing edge cavity downstream of the rear side plate of the flame stabilizer, and provides a trailing edge boss on the rear side plate. This, combined with the cooling vents on the trailing edge boss, the rear side plate, and the trailing edge wing plate, creates a more stable cooling vortex within the trailing edge cavity, isolating the flame stabilizer from its downstream recirculation zone, thereby reducing the heat load on the flame stabilizer and preventing thermal ablation. Simultaneously, this cooling method has minimal impact on the recirculation zone behind the stabilizer and does not impair the flame stabilization function of the flame stabilizer. On the other hand, the cooling gas, through the cooling vents, can form a film cooling effect on the trailing edge wall of the stabilizer, thereby effectively extending the service life of the flame stabilizer. Attached Figure Description

[0024] The accompanying drawings are used to provide a further understanding of the technical solutions of this application and constitute a part of the specification. They are used together with the embodiments of this application to explain the technical solutions of this application, but do not constitute a limitation on the technical solutions of this application.

[0025] Figure 1 A three-dimensional structural schematic diagram along a cross-section perpendicular to the circumferential direction, showing the first embodiment of the integrated flame stabilizer with a boss provided in the trailing edge cavity provided by the present invention.

[0026] Figure 2 A three-dimensional structural schematic diagram of the first embodiment of the integrated flame stabilizer with a boss provided in the trailing edge cavity provided by the present invention along a cross section perpendicular to the radial direction.

[0027] Figure 3A schematic diagram of temperature and streamline numerical simulation along a cross section perpendicular to the radial direction, for a first embodiment of the integrated flame stabilizer with a boss provided in the trailing edge cavity provided by the present invention.

[0028] Figure 4 A three-dimensional structural schematic diagram along a cross-section perpendicular to the circumferential direction, for a second embodiment of the integrated flame stabilizer with a boss provided in the trailing edge cavity provided by the present invention.

[0029] Figure 5 A three-dimensional structural schematic diagram of a second embodiment of the integrated flame stabilizer with a boss provided in the trailing edge cavity provided by the present invention, along a cross section perpendicular to the radial direction.

[0030] Figure 6 A schematic diagram of temperature and streamline numerical simulation along a cross section perpendicular to the radial direction, for a second embodiment of the integrated flame stabilizer with a boss provided in the trailing edge cavity provided by the present invention.

[0031] Figure label:

[0032] 1-Flame stabilizer, 11-Flame stabilizer leading edge, 12-Circumferential side plate, 13-Front partition, 14-Rear side plate, 15-Radial side plate, 16-Oil-gas mixing chamber, 17-Cooling gas chamber, 18-Recirculation zone, 19-Rear impact partition;

[0033] 2-Injector bar;

[0034] 3-Cooling air inlet pipe;

[0035] 4- Trailing edge wingplate, 41- Trailing edge cavity;

[0036] 5-Tail edge boss;

[0037] 6-Cooling vent, 61-First cooling vent, 62-Second cooling vent, 63-Third cooling vent, 64-Fourth cooling vent, 65-Fifth cooling vent, 66-Cooling vortex. Detailed Implementation

[0038] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. The descriptions of the exemplary embodiments are merely illustrative and are not intended to limit the invention or its application or use in any way. The invention can be embodied in many different forms and is not limited to the embodiments described herein. These embodiments are provided to make the invention clear and complete, and to fully express the scope of the invention to those skilled in the art. It should be noted that, unless otherwise specifically stated, the relative arrangement of components and steps set forth in these embodiments should be interpreted as merely exemplary and not as limiting.

[0039] like Figure 1-6As shown, this invention provides an integrated flame stabilizer with a boss inside the trailing edge cavity. Its main structure comprises a flame stabilizer 1, a fuel injector 2, a cooling gas inlet pipe 3, a trailing edge wing 4, and a trailing edge boss 5. The flame stabilizer 1 mainly includes a leading edge 11, a circumferential side plate 12, a front partition 13, a rear side plate 14, and a radial side plate 15. Internally, it forms an interconnected fuel-air mixing chamber 16 and a cooling gas chamber 17, and externally, a downstream recirculation zone 18. The fuel injector 2 is connected to the interior of the fuel-air mixing chamber 16, while the cooling gas inlet pipe 3 is connected to the interior of the cooling gas chamber 17. Therefore, the cooling gas from the outer bypass duct will enter the cooling gas chamber 17 through the cooling gas inlet pipe 3 to effectively cool the cooling gas chamber 17. Some of the cooling gas will further enter the fuel-air mixing chamber 16 from the cooling gas chamber 17, and mix fully with the fuel injected by the fuel injector 2 to form a fuel-air mixture. Then, it will be injected from the fuel injection hole on the circumferential side plate 12, flow along the circumferential side plate 12 to the return zone 18 and stay there for combustion, thereby playing the role of building a stable ignition source.

[0040] The front baffle 13 effectively isolates the fuel-air mixing chamber 16 and the cooling air chamber 17 within the flame stabilizer 1, thereby preventing fuel in the fuel-air mixing chamber 16 from entering the cooling air chamber 17. Furthermore, the front baffle 13 increases the residence time of the cooling air in the fuel-air mixing chamber 16, ensuring effective cooling.

[0041] A pair of trailing edge vanes 4 are also provided on the rear side of the flame stabilizer 1, extending rearward from the rear ends of the two circumferential side plates 12 of the flame stabilizer 1, thereby forming a trailing edge cavity 41 between the two trailing edge vanes 4. Furthermore, inside the trailing edge cavity 41, a trailing edge boss 5 is provided on the rear side plate 14 of the flame stabilizer 1, and the trailing edge boss 5 is positioned between the two trailing edge vanes 4. The trailing edge structure of the flame stabilizer 1, formed by the trailing edge vanes 4 and the trailing edge boss 5, is more conducive to arranging cooling vents 6 to form cooling vortices 66.

[0042] Specifically, both the trailing edge wing plate 4 and the trailing edge boss 5 are hollow structures that communicate with the cooling air cavity 17. Cooling air holes 6 are provided on the trailing edge boss 5 and the rear side plate 14 or on the trailing edge boss 5 and the trailing edge wing plate 4. The cooling air holes 6 are configured so that the ejected airflow can form cooling vortices 66 on both sides of the circumference of the trailing edge boss 5 in the trailing edge cavity 41, so that the flame stabilizer 1 and the recirculation zone 18 are separated from each other, protecting the rear side plate 14 of the flame stabilizer 1 from the high temperature of the recirculation zone 18 and preventing thermal ablation.

[0043] Considering the size of the cooling vortex 66, a single cooling vortex 66 is difficult to directly fill all areas within the trailing edge cavity 41. Therefore, the present invention provides multiple cooling vents 6 radially on the trailing edge boss 5, the rear side plate 14, and the trailing edge wing plate 4, forming multiple cooling vortices 66 extending in the circumferential direction. This effectively fills the trailing edge cavity 41 by arranging multiple cooling vortices 66 radially, ensuring the spacing and cooling effect of the cooling vortices 66.

[0044] This invention, by providing a trailing edge protrusion 5 within the trailing edge cavity 41, allows for more convenient arrangement of cooling air holes 6 by utilizing the dimensions of the trailing edge protrusion 5 along the flow direction. Furthermore, it enables the gas ejected from the cooling air holes 6 to have an initial velocity perpendicular to the flow direction, which is more conducive to the formation of cooling vortices 66 within the trailing edge cavity 41. The specific methods by which the cooling air holes 6 promote the formation of cooling vortices 66 will be described in the following two preferred embodiments.

[0045] like Figure 1-3 As shown, in the first embodiment of the present invention, when the height of the trailing edge boss 5 is relatively short, for example, between 1 / 5 and 1 / 2 of the flow length of the trailing edge cavity 41, the cooling vent 6 includes a second cooling vent 62 located on the circumferential sidewall of the trailing edge boss 5 and a third cooling vent 63 located on the rear side plate 14. Thus, as Figure 3 As shown, the airflow velocity perpendicular to the flow direction generated by the second cooling hole 62 and the airflow velocity along the flow direction generated by the third cooling hole 63 will cause the cooling air to form vortices radially outward on both sides of the circumferential edge boss 5 (i.e., Figure 3 The lower region of the trailing edge boss 5 shows a counterclockwise rotating vortex region and a radially inward (i.e., Figure 3 The upper region of the trailing edge boss 5 shows two sets of vortices in a clockwise rotating swirling region.

[0046] Furthermore, the continuous jetting of cooling air from the second cooling hole 62 and the third cooling hole 63 can promote the formation of the cooling vortex 66 as described above, and can also continuously maintain the cooling vortex 66 by continuously injecting fresh cooling air, ensuring that the cooling vortex 66 does not dissipate and keeping the airflow at the cooling vortex 66 in a relatively low temperature environment, preventing the trailing edge area of ​​the flame stabilizer 1 from being burned and damaged.

[0047] Preferably, the second cooling holes 62 are located on the side of the circumferential sidewall of the trailing edge boss 5 near the rear side plate 14. Multiple second cooling holes 62 are arranged radially and uniformly, and configured such that the airflow direction at the outlet is perpendicular to the flow direction. Thus, the cooling air ejected from the second cooling holes 62 can flow along the rear side plate 14 at its initial velocity perpendicular to the flow direction, providing a certain degree of film cooling to the rear side plate 14 of the flame stabilizer 1.

[0048] Preferably, the third cooling hole 63 is located on the side of the rear side plate 14 near the trailing edge wing 4. Multiple third cooling holes 63 are evenly arranged radially and configured such that the airflow direction at the outlet is parallel to the extending direction of the trailing edge wing 4. Thus, the cooling air ejected from the third cooling hole 63 can flow along the inner surface of the trailing edge wing 4 under the action of its initial velocity parallel to the flow direction, providing a certain degree of film cooling to the inner surface of the trailing edge wing 4.

[0049] like Figure 4-6 As shown, in the second embodiment of the present invention, preferably, when the height of the trailing edge boss 5 is relatively high, for example, between 1 / 2 and 4 / 5 of the flow length of the trailing edge cavity 41, the cooling vent 6 includes a fourth cooling vent 64 located on the circumferential sidewall of the trailing edge boss 5 and a fifth cooling vent 65 located on the trailing edge wing plate 4. Thus, as Figure 5 As shown, the airflow perpendicular to the flow direction generated by the fourth cooling hole 64 and the fifth cooling hole 65 will act relatively at different heights of the boss. That is, the fourth cooling hole 64 sprays airflow toward the trailing edge wing plate 4 at a flow direction position farther away from the rear side plate 14, while the fifth cooling hole 65 sprays airflow toward the trailing edge boss 5 at a flow direction position closer to the rear side plate 14. This causes the cooling vortex 66 to form vortices radially outward on both sides of the circumference of the trailing edge boss 5. Figure 6 The upper region of the trailing edge boss 5 shows a counterclockwise rotating vortex region and a radially inward (i.e., Figure 6 The lower region of the trailing edge boss 5 shows two sets of vortices in a clockwise rotating swirling region.

[0050] Furthermore, the continuous jetting of cooling air from the fourth cooling hole 64 and the fifth cooling hole 65 can promote the formation of the cooling vortex 66 as mentioned above, and can also continuously maintain the cooling vortex 66 by continuously injecting fresh cooling air, ensuring that the cooling vortex 66 at this location does not dissipate, and keeping the airflow at the cooling vortex 66 in a relatively low temperature environment to prevent the trailing edge area of ​​the flame stabilizer 1 from being burned and damaged.

[0051] Preferably, the fourth cooling hole 64 is located on the side of the circumferential sidewall of the trailing edge boss 5 away from the rear side plate 14. Multiple fourth cooling holes 64 are evenly arranged radially and configured such that the airflow direction at the outlet is perpendicular to the flow direction. Thus, the cooling air ejected from the fourth cooling hole 64 can impact the trailing edge wing plate 4 under its initial velocity perpendicular to the flow direction, providing a certain degree of impact cooling to the inner surface of the trailing edge wing plate 4.

[0052] Preferably, the fifth cooling hole 65 is located on the side of the trailing edge wing 4 near the rear side plate 14. Multiple fifth cooling holes 65 are evenly arranged radially and configured such that the airflow direction at the outlet is perpendicular to the extending direction of the trailing edge wing 4. Thus, the cooling air ejected from the fifth cooling hole 65 can flow along the outer surface of the rear side plate 14 at an initial velocity perpendicular to the flow direction, providing a certain degree of film cooling to the rear side plate 14.

[0053] Preferably, the rear end face of the trailing edge wing 4 is provided with a first cooling hole 61 at the outlet where the airflow is sprayed in a direction parallel to the flow direction. The first cooling hole 61 can cause the cooling air in the cooling air chamber 17 to flow from the inside through the entire trailing edge wing 4 and be sprayed out from the rear end of the trailing edge wing 4, so as to provide corresponding cooling for the trailing edge wing 4.

[0054] Preferably, the rear side plate 14 and the tail edge boss 5 are formed by bending a whole plate multiple times, thereby improving the integrity of the rear side plate 14 and the tail edge boss 5 and avoiding the problem of thermal deformation failure during repeated thermal expansion and contraction when using splicing or welding processes. The plate surface constituting the rear side plate 14 is arranged perpendicular to the flow direction, the circumferential side of the tail edge boss 5 is arranged along the flow direction, and the rear side of the tail edge boss 5 is arranged perpendicular to the flow direction.

[0055] Preferably, the integrated flame stabilizer with a boss in the tail edge cavity further includes: a rear impact baffle 19, which is disposed on the front side of the rear side plate 14 of the flame stabilizer 1, and has a plurality of impact vents thereon.

[0056] The rear impact baffle 19 effectively isolates the cooling air chamber 17 within the flame stabilizer 1 from the rear side plate 14 of the flame stabilizer 1, thereby preventing heat transfer within the flame stabilizer 1. Furthermore, the rear impact baffle 19 increases the residence time of the cooling air in front of the rear side plate 14 of the flame stabilizer 1, ensuring effective cooling. The impact vents on the baffle increase the velocity of the cooling air as it impacts the rear side plate 14 of the flame stabilizer 1 from the cooling air chamber 17, further enhancing the cooling effect.

[0057] Therefore, on the one hand, the present invention utilizes the trailing edge wing plate 4 to form a trailing edge cavity 41 downstream of the rear side plate 14 of the flame stabilizer 1, and provides a trailing edge boss 5 on the rear side plate 14. This allows the trailing edge boss 5, the rear side plate 14, and the cooling air holes 6 provided on the trailing edge wing plate 4 to form a stable cooling vortex 66 within the trailing edge cavity 41, isolating the flame stabilizer 1 from its downstream recirculation zone 18, thereby reducing the heat load on the flame stabilizer 1 and preventing ablation. Simultaneously, this cooling method has minimal impact on the recirculation zone 18 behind the stabilizer and does not impair the flame stabilization function of the flame stabilizer 1. On the other hand, the cooling air through the cooling air holes 6 can form a film cooling effect on the trailing edge wall of the stabilizer, effectively improving the service life of the flame stabilizer 1. Furthermore, by providing the trailing edge boss 5 on the rear side plate 14, not only can the trailing edge cavity 41 be divided, but the position of the cooling air holes 6 can also be made more flexible. Furthermore, the cooling gas entering the flame stabilizer 1 can also cool the fuel injector 2, thereby solving the problem of fuel injector coking.

[0058] Therefore, in the non-afterburning state, the flame stabilizer 1 is filled with cooling gas. In the afterburning state, the fuel-air mixing chamber 16 is filled with standby fuel and cooling gas, while the cooling gas chamber 17 is filled with only cooling gas. Specifically, the cooling air is divided into two parts: the first part of the cooling air flows backward and enters the inner side of the trailing edge through the impact air hole on the rear impact baffle 19, impacting and cooling the inner wall surface of the rear side plate 14 of the flame stabilizer 1. Then, it reaches the rear side of the trailing edge through the cooling air hole 6 opened on the trailing edge boss 5, the rear side plate 14 and the trailing edge wing plate 4, forming a cooling air film on the rear side plate 14 and the trailing edge wing plate 4 of the flame stabilizer 1 to protect the wall surface, or forming a cold air vortex 66 in the trailing edge cavity 41, extending the residence time of the cold air and enhancing the cooling effect; the second part of the cooling air flows forward and reaches the oil-air mixing chamber 16 of the flame stabilizer 1 through the air hole on the front baffle 13, cooling the fuel injector 2 and the inner wall surface of the leading edge 11 of the flame stabilizer, thereby solving the problem of fuel injector coking, and finally leaving the flame stabilizer 1 through the fuel injector hole on the circumferential side plate 12.

[0059] In this summary, specific embodiments of the present invention have been described in detail through examples. However, those skilled in the art should understand that the above examples are for illustrative purposes only and are not intended to limit the scope of the invention. It should be understood that modifications can be made to the above embodiments or equivalent substitutions can be made to some technical features without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.

Claims

1. An integrated flame stabilizer with a boss inside a trailing edge cavity, characterized in that, include: The flame stabilizer (1) includes a flame stabilizer front edge (11), a circumferential side plate (12), a front partition (13), a rear side plate (14) and a radial side plate (15), and forms an interconnected oil-gas mixing chamber (16) and a cooling gas chamber (17) inside, and a reflux zone (18) is formed downstream outside. The fuel injector (2) is connected to the interior of the oil-gas mixing chamber (16); Cooling air inlet pipe (3) is connected to the interior of the cooling air chamber (17); Trailing edge wing (4) is disposed on the rear side of the flame stabilizer (1) and extends rearward from the rear ends of the two circumferential side plates (12) respectively, thereby forming a trailing edge cavity (41) between the two trailing edge wing (4); A trailing edge boss (5) is provided on the rear side plate (14) and is located between the two trailing edge wing plates (4); The trailing edge wing plate (4) and the trailing edge boss (5) are both hollow structures that communicate with the cooling air cavity (17). Multiple cooling air holes (6) are provided on the trailing edge boss (5) and the rear side plate (14), or on the trailing edge boss (5) and the trailing edge wing plate (4), so that cooling vortices (66) are formed on both sides of the trailing edge boss (5) in the trailing edge cavity (41), so that the flame stabilizer (1) is separated from the recirculation zone (18).

2. The integrated flame stabilizer with a boss provided in the trailing edge cavity according to claim 1, characterized in that, The trailing edge wing plate (4) has a first cooling hole (61) on its rear end face that sprays cooling air in a direction parallel to the flow direction.

3. The integrated flame stabilizer with a boss provided in the trailing edge cavity according to claim 1, characterized in that, When the height of the trailing edge boss (5) is between 1 / 5 and 1 / 2 of the flow length of the trailing edge cavity (41), the cooling vent (6) includes a second cooling vent (62) located on the circumferential sidewall of the trailing edge boss (5) and a third cooling vent (63) located on the rear side plate (14).

4. The integrated flame stabilizer with a boss provided in the trailing edge cavity according to claim 3, characterized in that, The second cooling hole (62) is located on the side of the circumferential sidewall of the tail edge boss (5) near the rear side plate (14). The plurality of second cooling holes (62) are arranged evenly in the radial direction and configured such that the airflow direction at the outlet is perpendicular to the flow direction.

5. The integrated flame stabilizer with a boss provided in the trailing edge cavity according to claim 3, characterized in that, The third cooling hole (63) is located on the side of the rear side plate (14) near the trailing edge wing (4). The plurality of the third cooling holes (63) are arranged radially evenly and configured such that the airflow direction at the outlet is parallel to the extension direction of the trailing edge wing (4).

6. The integrated flame stabilizer with a boss provided in the trailing edge cavity according to claim 1, characterized in that, When the height of the trailing edge boss (5) is between 1 / 2 and 4 / 5 of the flow length of the trailing edge cavity (41), the cooling vent (6) includes a fourth cooling vent (64) located on the circumferential sidewall of the trailing edge boss (5) and a fifth cooling vent (65) located on the trailing edge wingplate (4).

7. The integrated flame stabilizer with a boss in the trailing edge cavity according to claim 6, characterized in that, The fourth cooling hole (64) is located on the side of the circumferential sidewall of the tail edge boss (5) away from the rear side plate (14). The plurality of fourth cooling holes (64) are arranged evenly in the radial direction and are configured such that the airflow direction at the outlet is perpendicular to the flow direction.

8. The integrated flame stabilizer with a boss in the trailing edge cavity according to claim 7, characterized in that, The fifth cooling hole (65) is located on the side of the trailing edge wing (4) near the rear side plate (14). The plurality of fifth cooling holes (65) are arranged radially evenly and configured such that the airflow direction at the outlet is perpendicular to the extension direction of the trailing edge wing (4).

9. The integrated flame stabilizer with a boss in the trailing edge cavity according to claim 1, characterized in that, The rear side plate (14) and the tail edge boss (5) are formed by bending a whole plate multiple times. The plate surface constituting the rear side plate (14) is arranged perpendicular to the flow direction, the circumferential side of the tail edge boss (5) is arranged along the flow direction, and the rear side of the tail edge boss (5) is arranged perpendicular to the flow direction.

10. The integrated flame stabilizer with a boss in the trailing edge cavity according to claim 1, characterized in that, Also includes: The rear impact baffle (19) is located on the front side of the rear side plate (14) of the flame stabilizer (1), and has multiple impact vents thereon.

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