A thin-film evaporation and center-slit dual-mode stabilizer

Abstract

This application belongs to the field of afterburner design and is a thin-film evaporation and middle-slit dual-mode stabilizer, which includes a stabilizer outer wall, a stabilizer inner wall, a fixing mechanism, an oil inlet pipe, and a fuel manifold. When ignition is carried out, fuel is ejected reversely from the fuel injection holes of the fuel manifold and impacts the first reverse injection baffle or the second reverse injection baffle to form oil film evaporation. After evaporation, the combustible gas and air are mixed and enter the recirculation zone through turbulence. Finally, the oil-gas mixture in the recirculation zone is ignited by an ignition plug, realizing the ignition structure of the thin-film evaporation type stabilizer. At the same time, fuel is ejected in the direction of the air flow from the air release holes, enters the recirculation zone through turbulence, and is ignited by the ignition plug, realizing the ignition structure of the middle-slit flame stabilizer. Thus, the fuel vapor accumulated at the lower opening of the fuel manifold in the initial stage of fuel supply can be quickly discharged from the air release holes, avoiding coking caused by excessive fuel temperature.

Description

Technical Field

[0001] This application belongs to the field of afterburner design, and particularly relates to a thin-film evaporation and middle-slit dual-mode stabilizer. Background Art

[0002] In the existing technical solution, the fuel manifold loop pipe has an internally connected structure, and its injection points also adopt a layout form symmetric about the fuel inlet pipe. No injection point is designed on the opposite side of the fuel inlet. As the temperature of the fuel manifold increases during heating, the flow velocity of the fuel on the opposite side of the fuel inlet pipe is slower, and the fuel temperature at this position is relatively high. The fuel is prone to coking after being heated.

[0003] When the engine operates in an intermediate state for a period of time, the fuel manifold is heated and the temperature rises, and the fuel evaporates after entering the manifold. Under the continuous push of the fuel, the fuel vapor is pushed to the position on the opposite side of the fuel inlet pipe. Since there is no exhaust hole here, the time for the fuel vapor to be discharged is relatively long, and this position cannot be cooled by the fuel, so the temperature of the fuel manifold further increases, exacerbating the coking of the fuel.

[0004] When the oil-gas mixture is discharged from the spray hole closest to the opposite side, the evaporated oil-gas mixture is prone to spontaneous combustion within the small recirculation formed by the reverse spray baffle, resulting in ablation of the stabilizer.

[0005] Therefore, how to prevent the ablation of the stabilizer while ensuring the normal operation of the stabilizer is a problem that needs to be solved. Summary of the Invention

[0006] The purpose of this application is to provide a thin-film evaporation and middle-slit dual-mode stabilizer to solve the problem of easy ablation when the oil-gas mixture is discharged from the spray hole closest to the opposite side in the prior art.

[0007] The technical solution of this application is: a thin-film evaporation and middle-slit dual-mode stabilizer, including a stabilizer outer wall, a stabilizer inner wall, a fixing mechanism, a fuel inlet pipe, and a fuel manifold; the fixing mechanism supports and fixes the stabilizer outer wall and the stabilizer inner wall. The front ends of the stabilizer outer wall and the stabilizer inner wall are provided with a first reverse spray baffle and a second reverse spray baffle. The first reverse spray baffle and the second reverse spray baffle are symmetrically arranged along the axis of the stabilizer inner wall. The fuel manifold is a whole-ring structure and is arranged inside the first reverse spray baffle and the second reverse spray baffle;

[0008] A first opening and a second opening are formed corresponding to each other between the first reverse spray baffle and the second reverse spray baffle. The fuel inlet pipe is arranged at the first opening and the inlet pipe is communicated with the fuel manifold. An air release hole is opened at the position of the fuel manifold corresponding to the second opening, and the air release hole is arranged along the air flow direction;

[0009] It further includes a V-shaped baffle. The V-shaped baffle is of an integral ring structure and is arranged between the outer wall and the inner wall of the stabilizer. A spark plug is arranged between the V-shaped baffle and the outer wall of the stabilizer.

[0010] A plurality of fuel injection holes are evenly formed in the fuel manifold along its circumferential direction and are arranged in a direction opposite to the air flow. The plurality of fuel injection holes are evenly arranged on both sides of the air release hole and the fuel inlet pipe.

[0011] Preferably, a first oil drainage channel is formed between the outer wall of the stabilizer and the V-shaped baffle, and between the inner wall of the stabilizer and the V-shaped baffle. A middle slit is formed in the V-shaped baffle at a position corresponding to the air release hole. A second oil drainage channel communicating with the middle slit is formed inside the V-shaped baffle. Both the first oil drainage channel and the second oil drainage channel flow towards the reflux zone.

[0012] Preferably, the fixing mechanism includes an upper ear seat, an upper connecting piece, a lower ear seat and a lower connecting piece. The upper ear seat corresponds to... The upper ear seat is fixedly connected to the outer wall of the stabilizer. The lower ear seat is fixedly connected to the inner wall of the stabilizer. A first bolt is threadedly connected between the upper connecting piece and the upper ear seat. A second bolt is threadedly connected between the lower connecting piece and the lower ear seat. The upper connecting piece and the lower connecting piece are arranged outside the first reverse injection baffle or the second reverse injection baffle. A third bolt is threadedly connected between the upper connecting piece and the lower connecting piece.

[0013] Preferably, an intermediate ear seat is arranged on the first reverse injection baffle or the second reverse injection baffle, and the intermediate ear seat is threadedly connected to the third bolt.

[0014] Preferably, a support is welded on the fuel manifold, and a screw is connected between the support and the first reverse injection baffle or the second reverse injection baffle.

[0015] Preferably, there are multiple groups of the air release holes and the second openings, and they are evenly spaced along the space between the outer wall and the inner wall of the stabilizer.

[0016] Preferably, the spark plug is arranged corresponding to the position of the air release hole.

[0017] Preferably, the spark plug is arranged corresponding to the position of the fuel injection hole.

[0018] A thin-film evaporation and middle-slit dual-mode stabilizer of the present application includes a stabilizer outer wall, a stabilizer inner wall, a fixing mechanism, an oil inlet pipe, and a fuel main pipe. When ignition is carried out, fuel is ejected reversely from the fuel injection holes of the fuel main pipe and impacts the first reverse injection baffle or the second reverse injection baffle to form oil film evaporation. After evaporation, the combustible gas and air are mixed and enter the recirculation zone through turbulence. Finally, the oil-gas mixture in the recirculation zone is ignited by an ignition spark plug, realizing the ignition structure of the thin-film evaporation type stabilizer. At the same time, fuel is ejected along the air flow direction from the air release holes, enters the recirculation zone through turbulence, and is ignited by the ignition spark plug, realizing the ignition structure of the middle-slit type flame stabilizer. Thus, the fuel vapor accumulated at the second opening of the fuel main pipe in the initial stage of fuel supply can be quickly discharged from the air release holes, avoiding coking caused by too high fuel temperature. Description of the Drawings

[0019] To more clearly illustrate the technical solutions provided by the present application, the drawings will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application.

[0020] Figure 1 Isometric view of the overall structure of the present application;

[0021] Figure 2 Schematic cross-sectional structure diagram of the stabilizer at the air release holes of the present application;

[0022] Figure 3 Schematic cross-sectional structure diagram of the stabilizer at the fuel injection holes of the present application;

[0023] Figure 4 Schematic structural principle diagram of the thin-film evaporation type stabilizer of the present application;

[0024] Figure 5 Schematic structural principle diagram of the middle-slit type stabilizer of the present application;

[0025] Figure 6 Schematic cross-sectional structure diagram of the stabilizer at the support of the present application;

[0026] Figure 7 Schematic structure diagram when the air release holes and fuel injection holes of the present application are arranged staggeredly.

[0027] 1. Stabilizer outer wall; 2. Stabilizer inner wall; 3. Ignition spark plug; 4. Oil inlet pipe; 5. Fuel main pipe; 6. First reverse injection baffle; 7. Second reverse injection baffle; 8. V-shaped baffle; 9. First opening; 10. Second opening; 11. Air release hole; 12. Fuel injection hole; 13. Middle slit; 14. Upper ear seat; 15. Upper connecting piece; 16. Lower ear seat; 17. Lower connecting piece; 18. Middle ear seat; 19. Support; 20. Screw. Detailed Embodiments

[0028] To make the purpose, technical solutions, and advantages of the implementation of this application clearer, the technical solutions in the embodiments of this application will be described in more detail below in conjunction with the accompanying drawings in the embodiments of this application.

[0029] A thin-film evaporation and split-seam dual-mode stabilizer, as Figures 1-3 shown, includes a stabilizer outer wall 1, a stabilizer inner wall 2, a fixing mechanism, an oil inlet pipe 4, and a fuel manifold 5; the fixing mechanism supports and fixes the stabilizer outer wall 1 and the stabilizer inner wall 2, and there are multiple groups of the fixing mechanism arranged at equal intervals along the front end of the stabilizer outer wall 1 and the stabilizer inner wall 2. The stabilizer outer wall 1 and the stabilizer inner wall 2 are coaxial integral ring structures, and the fuel manifold 5 is an integral ring structure coaxially arranged between the stabilizer outer wall 1 and the stabilizer inner wall 2.

[0030] In this application, the set airflow incoming direction is the front end, and the airflow flowing direction is the rear end.

[0031] At the front end of the stabilizer outer wall 1 and the stabilizer inner wall 2, there are a first reverse spray baffle 6 and a second reverse spray baffle 7. The first reverse spray baffle 6 and the second reverse spray baffle 7 are symmetrically arranged along the axis of the stabilizer inner wall 2. The fuel manifold 5 is an integral ring structure and the fuel manifold 5 is arranged inside the first reverse spray baffle 6 and the second reverse spray baffle 7.

[0032] Between the first reverse spray baffle 6 and the second reverse spray baffle 7, there are correspondingly arranged a first opening 9 and a second opening 10. The oil inlet pipe 4 is arranged at the first opening 9 and the inlet pipe is communicated with the fuel manifold 5. At the position of the fuel manifold 5 corresponding to the second opening 10, there is an air release hole 11, and the air release hole 11 is arranged in the airflow direction.

[0033] It further includes a V-shaped baffle 8. The V-shaped baffle 8 is an integral ring structure and is arranged between the stabilizer outer wall 1 and the stabilizer inner wall 2. A spark plug 3 is arranged between the V-shaped baffle 8 and the stabilizer outer wall 1.

[0034] The fuel manifold 5 is evenly provided with a plurality of injection holes 12 arranged in the reverse airflow direction along its circumferential direction, and the plurality of injection holes 12 are evenly arranged on both sides of the air release hole 11 and the oil inlet pipe 4.

[0035] During ignition, the fuel is ejected reversely from the injection holes 12 of the fuel manifold 5 and then impacts the first reverse spray baffle 6 or the second reverse spray baffle 7 to form oil film evaporation. After evaporation, the combustible gas and air are mixed and then discharged from the gap between the stabilizer outer wall 1, the stabilizer inner wall 2, and the V-shaped baffle 8, enter the recirculation zone through turbulence, and finally the oil-gas mixture in the recirculation zone is ignited by the spark plug 3 to realize the ignition structure of the thin-film evaporation type stabilizer, combined with Figure 4 .

[0036] Meanwhile, fuel is ejected from the vent hole 11 along the air flow direction. After being mixed with air, it is discharged from the gap between the V-shaped baffle 8 or the outer wall 1 of the stabilizer, the inner wall 2 of the stabilizer and the V-shaped baffle 8, enters the recirculation zone through turbulence, and finally the fuel-air mixture in the recirculation zone is ignited by the ignition plug 3, realizing the ignition structure of the split-type flame stabilizer. Combined with Figure 5 .

[0037] The vent hole 11 is located at the second opening 10, that is, on the opposite side of the fuel inlet pipe 4. Fuel vapor is likely to accumulate here. Since there is no reverse injection baffle structure at the ignition structure of the split 13-type flame stabilizer and there is no obstruction around it, the fuel vapor accumulated at the second opening 10 at the initial stage of fuel supply in the fuel main pipe 5 can be quickly discharged from the vent hole 11, avoiding coking caused by too high fuel temperature; at the same time, it can increase the flow velocity of the fuel at the position on the opposite side of the fuel main pipe 5, reduce the temperature at the position on the opposite side of the fuel main pipe 5, and avoid coking caused by too high fuel temperature; the design of canceling the reverse injection baffle can make the small recirculation zone at this place disappear, and the fuel-air mixture will not burn here, reducing the ablation risk of the fuel main pipe 5 and the stabilizer.

[0038] Preferably, a first oil discharge channel is formed between the outer wall 1 of the stabilizer and the V-shaped baffle 8, and between the inner wall 2 of the stabilizer and the V-shaped baffle 8; a slit 13 is provided at the position of the V-shaped baffle 8 corresponding to the vent hole 11, and a second oil discharge channel communicating with the slit 13 is formed inside the V-shaped baffle 8. Both the first oil discharge channel and the second oil discharge channel flow towards the recirculation zone. By providing the slit 13, most of the fuel flowing out of the vent hole 11 flows out of the slit 13 into the V-shaped baffle 8, and other fuel flows out through the first oil discharge channel and the second oil discharge channel, improving the efficiency of fuel discharge.

[0039] Preferably, the fixing mechanism includes an upper ear seat 14, an upper connecting piece 15, a lower ear seat 16 and a lower connecting piece 17; the upper ear seat 14 corresponds, the upper ear seat 14 is fixedly connected to the outer wall 1 of the stabilizer, the lower ear seat 16 is fixedly connected to the inner wall 2 of the stabilizer, a first bolt is threadedly connected between the upper connecting piece 15 and the upper ear seat 14, a second bolt is threadedly connected between the lower connecting piece 17 and the lower ear seat 16, the upper connecting piece 15 and the lower connecting piece 17 are arranged outside the first reverse injection baffle 6 or the second reverse injection baffle 7, and a third bolt is threadedly connected between the upper connecting piece 15 and the lower connecting piece 17; this design can simply and efficiently realize the effective fixation between the outer wall 1 of the stabilizer and the inner wall 2 of the stabilizer, ensure the stability of the first oil discharge channel and the second oil discharge channel, and is convenient for installation and disassembly at the same time.

[0040] Preferably, an intermediate ear seat 18 is provided on the first reverse spray baffle 6 or the second reverse spray baffle 7. The intermediate ear seat 18 is threadedly connected to the third bolt, so that the first reverse spray baffle 6 and the second reverse spray baffle 7 can maintain a stable position under the support of the stabilizer outer wall 1 and the stabilizer inner wall 2. At the same time, the blocking of the air inflow by the first reverse spray baffle 6 and the second reverse spray baffle 7 can be minimized as much as possible to ensure the air flow rate.

[0041] Combined Figure 6 , preferably, a support 19 is welded on the fuel manifold 5. A screw 20 is connected between the support 19 and the first reverse spray baffle 6 or the second reverse spray baffle 7. The support 19 and the fuel injection hole 12 are respectively located at different positions on the fuel manifold 5. The support 19 is of a T-shaped structure to stably cooperate with the opening of the first reverse spray baffle 6 or the second reverse spray baffle 7 to achieve effective fixation. The screw 20 is threadedly connected to the middle position of the support 19 to achieve upper and lower symmetry.

[0042] As a specific implementation manner, as Figure 7 shown, there are multiple groups of air release holes 11 and second openings 10, which are evenly spaced along the space between the stabilizer outer wall 1 and the stabilizer inner wall 2, forming a structure in which the film evaporation stabilizer and the slit 13 type flame stabilizer are arranged alternately, which can reduce the local flow resistance loss and improve the rich oil extinction boundary and the combustion stability of the ignition zone of the entire stabilizer.

[0043] As a specific implementation manner, as Figure 4 shown, the ignition plug 3 is arranged corresponding to the position of the fuel injection hole 12, without changing the rich and lean oil ignition boundaries of the entire stabilizer.

[0044] As a specific implementation manner, as Figure 5 shown, the ignition plug 3 is arranged corresponding to the position of the air release hole 11, which can improve the rich oil ignition boundary.

[0045] The above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed in the present application should be covered by the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A thin film evaporation and center seam dual-mode stabilizer, comprising a stabilizer outer wall (1), a stabilizer inner wall (2), a fixing mechanism, an oil inlet pipe (4) and a fuel main pipe (5); the fixing mechanism supports and fixes the stabilizer outer wall (1) and the stabilizer inner wall (2), and is characterized in that: A first reverse spray baffle (6) and a second reverse spray baffle (7) are provided in the oncoming flow direction of the air flow on the outer wall (1) and the inner wall (2) of the stabilizer. The first reverse spray baffle (6) and the second reverse spray baffle (7) are symmetrically arranged along the axis of the inner wall (2) of the stabilizer. The fuel manifold (5) is a ring structure and the fuel manifold (5) is arranged inside the first reverse spray baffle (6) and the second reverse spray baffle (7); A first opening (9) and a second opening (10) are formed correspondingly between the first reverse spray baffle (6) and the second reverse spray baffle (7). The inlet pipe (4) is arranged at the first opening (9) and the inlet pipe is communicated with the fuel manifold (5). An air release hole (11) is opened at a position corresponding to the second opening (10) on the fuel manifold (5). The air release hole (11) is arranged in the air flow direction; It further includes a V-shaped baffle (8). The V-shaped baffle (8) is a ring structure and is arranged between the outer wall (1) and the inner wall (2) of the stabilizer. A spark plug (3) is arranged between the V-shaped baffle (8) and the outer wall (1) of the stabilizer; The fuel manifold (5) is evenly provided with a plurality of injection holes (12) arranged in the reverse air flow direction along its circumferential direction. The plurality of injection holes (12) are evenly arranged on both sides of the air release hole (11) and the inlet pipe (4).

2. The thin film evaporation and center seam type dual-mode stabilizer according to claim 1, characterized in that: A first oil drainage channel is formed between the outer wall (1) of the stabilizer and the V-shaped baffle (8), and between the inner wall (2) of the stabilizer and the V-shaped baffle (8); A middle slit (13) is opened at a position corresponding to the air release hole (11) on the V-shaped baffle (8). A second oil drainage channel communicated with the middle slit (13) is formed inside the V-shaped baffle (8). Both the first oil drainage channel and the second oil drainage channel flow towards the recirculation zone.

3. The thin-film evaporation and center-seam dual-mode stabilizer according to claim 1, wherein: The fixing mechanism includes an upper ear seat (14), an upper connecting piece (15), a lower ear seat (16) and a lower connecting piece (17); The upper ear seat (14) corresponds to... The upper ear seat (14) is fixedly connected to the outer wall (1) of the stabilizer. The lower ear seat (16) is fixedly connected to the inner wall (2) of the stabilizer. A first bolt is threadedly connected between the upper connecting piece (15) and the upper ear seat (14). A second bolt is threadedly connected between the lower connecting piece (17) and the lower ear seat (16). The upper connecting piece (15) and the lower connecting piece (17) are arranged outside the first reverse spray baffle (6) or the second reverse spray baffle (7). A third bolt is threadedly connected between the upper connecting piece (15) and the lower connecting piece (17).

4. The thin film evaporation and center seam type dual-mode stabilizer according to claim 3, characterized in that: An intermediate ear seat (18) is arranged on the first reverse spray baffle (6) or the second reverse spray baffle (7). The intermediate ear seat (18) is threadedly connected to the third bolt.

5. The thin-film evaporation and center-seam dual-mode stabilizer according to claim 1, wherein: A support (19) is welded on the fuel manifold (5). A screw (20) is connected between the support (19) and the first reverse spray baffle (6) or the second reverse spray baffle (7).

6. The thin film evaporator and center seam dual-mode stabilizer according to claim 1, characterized in that: The air release hole (11) and the second opening (10) have multiple groups and are evenly spaced along between the outer wall (1) and the inner wall (2) of the stabilizer.

7. The thin film evaporator and center seam type dual-mode stabilizer according to claim 6, characterized in that: The spark plug (3) is arranged corresponding to the position of the air release hole (11).

8. The thin film evaporator and center seam type dual-mode stabilizer according to claim 6, characterized in that: The spark plug (3) is arranged corresponding to the position of the injection hole (12).

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