CN116951463A - Adjustable flame stabilizer device and afterburner of turbine engine - Google Patents

Abstract

The application discloses an adjustable flame stabilizer device, which comprises an actuating motor, a connecting structure component and a flame stabilizer component, wherein the flame stabilizer component comprises a flame stabilizer and 2 movable side walls, the connecting structure component is respectively connected with the actuating motor and the movable side walls, a stable fuel oil main pipe is arranged in the flame stabilizer in an extending way, a direct injection nozzle is arranged on an oil injection rod of the stable fuel oil main pipe, and an outlet of the direct injection nozzle corresponds to the inner wall surface of the side walls of the flame stabilizer. The application also discloses a turbine engine afterburner. The application adopts the scheme of the adjustable flame stabilizer, and the movable outer wall is controlled to be positioned at different gears, so that the adjustable flame stabilizer is suitable for being used under different stress application working conditions of a small-size turbine engine.

Description

Adjustable flame stabilizer device and afterburner of turbine engine

Technical Field

The application relates to an auxiliary device in a turbine engine, in particular to an adjustable flame stabilizer device and an afterburner of the turbine engine, and belongs to the technical field of turbine engines.

Background

The turbine engine adopting the afterburner can enable the engine to acquire larger thrust in a short time, and the afterburner generally has relatively short working time and can continuously work for 5-30 min in a single time. For the aircraft such as target drone, patrol projectile that is applied to small-size, afterburner single continuous operation only a few minutes, other times are the operation of no afterburner operating mode.

The afterburner is positioned behind the turbine component, the gas flow rate is higher, the pressure is lower, and if the high temperature Gao Suran airflow and fresh fuel oil are required to be fully combusted, a blunt body or a flame stabilizer is required to be installed behind the diffuser, a vortex capable of supporting stable combustion is established, and the design is matched with the afterburner fuel oil. The existing afterburner has more pneumatic layout forms, and the core component oil supply system (a fuel oil main pipe and an oil injection rod) and the flame stabilizer of the afterburner have more forms, but have more fixed structure forms; afterburners have evolved towards integrated designs that minimize the loss of afterburner flow resistance.

In summary, existing afterburner technology is directly applied to small turbine engines, with afterburners of significantly smaller sizes than larger afterburners, but with aerodynamic parameter orders of magnitude comparable to those of large turbine engines. The flow loss of the afterburner under the non-afterburner working condition and the combustion efficiency index under the afterburner working condition are difficult to be balanced, and secondly, the afterburner has the problem of narrow flameout and flameout boundaries. Therefore, there is a strong need for an afterburner that can meet the requirements of low flow loss under non-afterburner conditions, high combustion efficiency under afterburner conditions, and good ignition and flame stability.

Disclosure of Invention

The application aims to provide an adjustable flame stabilizer device which is used for solving the problems that in the prior art, the flow loss is large under the non-stress working condition of a small and medium turbine engine afterburner, the combustion efficiency is high under the stress working condition, and the ignition and stable combustion performances are good.

The application is realized in particular as follows:

the utility model provides an adjustable flame stabilizer device, includes actuating motor, connection structure subassembly, flame stabilizer subassembly, and flame stabilizer subassembly includes flame stabilizer and 2 movable lateral walls, and connection structure subassembly connects actuating motor and movable lateral wall respectively, extends in the inside steady fuel house steward that is provided with of flame stabilizer, is provided with the direct injection nozzle on steady fuel house steward's the fuel injection pole, and the export of direct injection nozzle corresponds the internal face of flame stabilizer lateral wall.

The further scheme is as follows:

the flame stabilizer is a V-shaped flame stabilizer and is positioned at the outlet end of the inner flow passage of the diffuser assembly.

The further scheme is as follows:

when the actuating motor is in the first gear, the movable side wall is all positioned outside the flame stabilizer, the flame stabilizer component is in the form of a simple V-shaped flame stabilizer, and when the actuating motor is in the second gear, only part of the movable side wall is positioned outside the flame stabilizer, and the flame stabilizer component forms a double V-shaped flame stabilizer.

The further scheme is as follows:

the inner wall surface of the tail end of the V-shaped flame stabilizer is an arc surface, which is favorable for the interaction of a fuel oil film and air.

The further scheme is as follows:

the outer wall surface of the front end of the movable side wall is an arc surface, which is beneficial to reducing the flow resistance.

The application also provides a afterburner of the turbine engine, which is provided with an adjustable flame stabilizer device, and further comprises a diffuser assembly, an afterburner cylinder assembly and a fuel oil supply assembly, wherein the diffuser assembly is positioned behind the turbine component, the afterburner cylinder is positioned behind the diffuser assembly, and the two components form a combustion area of the afterburner, so that a required space is provided for mixed combustion of high-temperature, high-speed and low-pressure fuel and fresh fuel. The fuel oil supply assembly comprises an oil supply system consisting of a stress application fuel oil main pipe and a stable fuel oil main pipe, wherein the stress application fuel oil main pipe is positioned in an inner flow passage of the diffuser assembly, and the flame stabilizer assembly is in front of the flame stabilizer assembly; the stable combustion fuel oil main pipe consists of a sectional ring pipe and an oil injection rod, wherein the sectional ring pipe is positioned outside the boosting cylinder, and the oil injection rod is arranged inside the flame stabilizer. The adjustable flame stabilizer device comprises an actuating motor and a flame stabilizer component, wherein the flame stabilizer component is positioned at the outlet end of the diffuser component, the actuating motor is positioned outside the boosting cylinder, penetrates through the boosting cylinder and is connected with the flame stabilizer component; the flame holder assembly is comprised of a simple V-shaped flame holder and a movable sidewall.

The further scheme is as follows:

the afterburner employs 4-12 flame holder assemblies.

The further scheme is as follows:

the fuel oil main pipe fuel injection rod is arranged in the overhanging radial flame stabilizer assembly, each fuel injection rod consists of a plurality of groups of fuel injection holes, and fuel oil is injected to the inner wall surface of the V-shaped flame stabilizer through the fuel injection holes, so that a moving oil film is formed by adherence.

The further scheme is as follows:

each oil injection rod of the stable combustion fuel oil main pipe consists of 3-6 groups of direct injection nozzles, and each group of 2 direct injection nozzles form a plurality of groups of stable combustion duty flame areas along the radial direction, so that the stable combustion fuel oil main pipe is beneficial to quick ignition and full combustion of an afterburner.

The further scheme is as follows:

the included angle of the two direct injection nozzles on the oil injection rod is 100-150 degrees.

The further scheme is as follows:

the number of the fuel injection rods of the fuel stabilizing main pipe is the same as that of the overhanging radial flame stabilizer.

When the engine works under the non-stress working condition, in order to reduce the flow resistance of the stress combustion chamber, the most important mode is to reduce the blocking ratio of the flame stabilizer, namely the movable side wall of the flame stabilizer is overlapped with the wall surface of the V-shaped flame stabilizer. When the engine enters the working condition of opening and boosting, the actuating motor drives the movable side wall to move obliquely and backward to the wall surface of the V-shaped flame stabilizer to form the double-V-shaped flame stabilizer, the blocking ratio is greatly increased, the backflow vortex area behind the flame stabilizer is increased, and the boosting fuel oil is combusted fully. Meanwhile, partial air flow enters a gap between the V-shaped flame stabilizer and the movable side wall, fuel is sprayed to the inner wall surface of the V-shaped flame stabilizer through a fuel spray hole on a fuel spray rod of a fuel stabilizing main pipe, moves along the wall surface to form an oil film, is broken and evaporated under the action of the gap flow at the tail end of the V-shaped flame stabilizer, moves along with the gap flow and burns in a backflow area in the flame stabilizer, plays the role of duty flame, and is beneficial to expanding the flameout boundary and stabilizing the combustion performance.

The application has at least the following beneficial effects:

(1) According to the application, the scheme of the adjustable flame stabilizer is adopted, the scheme of a traditional non-adjustable radial flame stabilizer is not adopted, the blocking ratio of the flame stabilizer is minimum by controlling the movable outer wall to be positioned at the first gear, the mode is more suitable for the use of a small-size turbine engine under the non-stress working condition, the flow loss of the afterburner is smaller, and the thrust is higher under the non-stress working condition of the engine.

(2) According to the scheme of the adjustable flame stabilizer, the movable outer wall is controlled to be positioned in the second gear, the blocking of the flame stabilizer is maximum, the mode is more suitable for the application of the afterburner in the stress working condition of the small-size turbine engine, the afterburner is favorable for constructing a vortex area and a low-speed area with large enough sizes under the conditions of high speed and low pressure, and the afterburner has higher stable combustion performance and combustion efficiency.

(3) The flame stabilizer is arranged in the fuel main pipe for stabilizing combustion, and is designed integrally with the adjustable flame stabilizer in the second gear state, the mode is used for a small-size turbine engine, pneumatic resistance is not increased, a backflow area with enough size can be built, after the backflow area is matched with fuel, the gas-oil ratio and the temperature of the backflow area can be controlled, and on-duty flame with a pilot lamp effect can be formed, and the on-duty flame can ignite fresh gas-oil mixture of main flow. Because of the arrangement of a plurality of injection points in the radial direction of the flame stabilizer, the flame stabilizer not only widens the flameout boundary of the small-size turbine engine, but also greatly shortens the ignition time and has higher combustion efficiency.

In general, the application does not adopt a fixed flame stabilizer design scheme, creatively adopts an adjustable flame stabilizer design scheme, has smaller blocking of the flame stabilizer under the non-stress working condition and small flow loss, and can improve the combustion efficiency by adjusting the flame stabilizer by an actuating motor and having larger blocking after the adjustment under the processing working condition; and secondly, the integrated design of a stable fuel oil way and an adjustable flame stabilizer is innovatively adopted, a fuel injection rod injects fuel oil to the inner wall surface of a flame tube to form a liquid film, under the impact action of high-speed air flow between the wall surface and the side wall of the flame stabilizer, the fuel oil is atomized and mixed with air, and enters a median class flame stable combustion area of the flame stabilizer, so that the flameout boundary of an afterburner is greatly widened, the combustion stability of the afterburner is improved, and the overall performance of the afterburner of the small turbine engine is better.

Drawings

FIG. 1 is a schematic view of the overall layout of an afterburner of the present application;

FIG. 2 is a cross-sectional view of the adjustable flame holder of the present application in a first gear position;

FIG. 3 is a cross-sectional view of the adjustable flame holder of the present application in a second gear position;

FIG. 4 is a schematic illustration of a fuel injection rod of the fuel manifold assembly of the present application;

FIG. 5 is a cross-sectional view of an over-stable fuel manifold fuel injection rod of the present application;

FIG. 6 is a cross-sectional view of a fuel injection rod and flame stabilizer matching for a fuel manifold of the present application;

reference numerals: the flame stabilizer comprises a diffuser assembly 1, a stress application barrel assembly 2, a fuel oil supply assembly 3, an adjustable flame stabilizer device 4, a diffuser casing 11, an inner cone 12, a stress application fuel manifold 31, a stable fuel manifold 32, a direct injection nozzle 321, a fuel injection rod 322, a 41 actuation motor 42, a connecting structure assembly 421 actuation ring 422 actuation rod 423, a supporting rod 43, a flame stabilizer assembly 431, a movable side wall 432, a supporting rod 433, a hinge 434 and F fuel.

Detailed Description

For a better understanding of the present application, reference is made to the following description of the application, taken in conjunction with the accompanying drawings and the following examples.

As shown in fig. 1, the afterburner for the small turbojet engine comprises an afterburner assembly 1, an afterburner cylinder assembly 2, a fuel supply assembly 3 and an adjustable flame stabilizer device 4. The diffuser assembly 1 comprises a diffuser casing 11 and an inner cone 12; the booster cylinder 2 is positioned behind the diffuser assembly 1 and is connected with the diffuser assembly 1 through screws. The diffuser assembly 1 and the booster cylinder 2 form a cavity to provide the space for the fuel and gas to mix and burn. The fuel supply assembly 3 comprises a boost fuel main pipe 31 and a stable fuel main pipe 32, wherein the boost fuel main pipe 31 is positioned in a flow passage of the diffuser assembly 1; the fuel-stabilizing main pipe 32 is composed of a ring pipe 321 and a fuel injection rod 322, wherein the ring pipe 321 is positioned outside the booster cylinder 2 and is a sectional ring pipe, the fuel injection rod 322 is positioned inside the flame stabilizer assembly 43 and is fixed on the booster cylinder 2. The adjustable flame stabilizer device comprises an actuating motor 41, a connecting structure assembly 42 and a flame stabilizer assembly 43, wherein the connecting structure assembly comprises an actuating ring 421, an actuating rod 422 and a supporting rod 423, and the flame stabilizer assembly 43 comprises a flame stabilizer 431 and 2 movable side walls 432; the actuating motor 41 is positioned outside the stressing barrel 2, the connecting structure component 42 is connected with the actuating motor 41 and the movable side wall 432 of the flame stabilizer, one end of the flame stabilizer 431 is connected with the diffuser casing 11 in a hinged mode, and the other end of the flame stabilizer 431 is fixed on the inner cone 12 of the diffuser component through a hinge, so that the reliable fixation of the V-shaped flame stabilizer 431 is realized; in this embodiment, a strut 423 structure is disposed outside the movable sidewall 432, and the strut 423 passes through the stressing cylinder 2 to be fixedly connected with the actuating rod 422, and meanwhile, the stressing cylinder assembly 2 is grooved at a corresponding position for the movable sidewall 432 to move. The number of actuating rods 422 and struts 423 and movable side walls 432 corresponds to one-to-one, and the number of flame holders and fuel injection rods of the fuel stabilization manifold corresponds to one-to-one, and in a common afterburner, 4-12 flame holder assemblies can be used.

As shown in fig. 2, this embodiment provides a combination of a V-shaped flame holder 431 and a movable sidewall 432 in an adjustable flame holder apparatus. Namely, under the non-stressing working condition, the output rod of the actuating motor 421 moves leftwards, the actuating rod 422 and the supporting rod 421 are driven to move leftwards to the limit position, and at the moment, the supporting rod 423 moves along the preset channel, so that the movable side wall 432 is tightly attached to the side wall surface of the V-shaped flame stabilizer 431.

As shown in fig. 3, when the actuating motor 421 outputs a rod to move to the right under the stress working condition, the actuating rod 422 and the supporting rod 423 are pulled to move to the right to the limit position, and the supporting rod 423 moves along the preset channel to enable the movable side wall 432 to be far away from the V-shaped flame stabilizer 431, and a gap exists between the movable side wall 432 and the outer wall of the V-shaped flame stabilizer 431, so that the gas a can pass through.

As shown in fig. 4-5, on the basis of embodiment 1 and embodiment 2, the fuel-stabilizing fuel manifold is composed of a sectional ring pipe and 6-10 fuel injection rods 32, the sectional ring pipe is fixed on the outer wall of the booster cylinder, the fuel injection rods 32 are positioned in the V-shaped flame stabilizer 431 and fixed on the booster cylinder 2, and the ring pipe is connected with the fuel injection rods 32 through a tee joint structure. The number of the fuel injection rods of the fuel stabilizing main pipe is the same as that of the overhanging radial flame stabilizer. The spray bar 32 comprises 3-6 sets of 2 straight injection nozzles 321, each set of 2 straight injection nozzles 321, and the angle between the 2 straight injection nozzles is in the range of 100 ° -150 °.

As shown in fig. 6, when the movable side wall 432 moves rearward, a gap exists between the flame holder side wall 431 and the movable side wall 432, through which the gas a can form a stable combustion return vortex inside the adjustable flame holder device 43; the fuel F is then ejected through the direct injection nozzle 321 on the fuel manifold injection rod 32, the fuel F impacts the inner wall surface of the side wall of the flame stabilizer 431 and moves to form an oil film, and at the end of the side wall of the flame stabilizer 431, the fuel F is impacted by the high-speed fuel A, is crushed, evaporated and mixed with the fuel A to burn, so as to form a stable-combustion vortex area, so as to ignite the main stream oil-gas mixture, expand the flameout boundary of the afterburner and provide combustion efficiency.

Working principle: when the engine is operated in a non-stress condition, the actuation motor is in a first gear position, the movable side wall 432 of the flame holder assembly 43 coincides with the V-shaped flame holder wall 431, the blocking ratio of the flame holder 43 is reduced, and the flow resistance of the afterburner can be obviously reduced. When the engine enters the working condition of opening and boosting, the actuating motor is converted from the first gear to the second gear, the movable side wall 432 is driven to move obliquely and backward to the wall surface of the V-shaped flame stabilizer 431, the movable side wall 432 and the wall surface of the V-shaped flame stabilizer 43 form the double-V-shaped flame stabilizer 43 together, the blocking ratio is greatly increased, the increase of the backflow vortex area behind the flame stabilizer 43 is facilitated, the fuel F sprayed by the boosting fuel header pipe 31 can be more fully mixed, and the full combustion of the boosting fuel is facilitated. Meanwhile, part of air flow A enters a gap between the V-shaped flame stabilizer 431 and the movable side wall 432, fuel F is sprayed to the inner wall surface of the V-shaped flame stabilizer 431 through the fuel spray hole 321 on the fuel spray rod 32 of the fuel main pipe, moves along the wall surface to form an oil film, is broken and evaporated under the action of the gap flow A at the tail end of the V-shaped flame stabilizer 431, moves along with the gap flow A and burns in a backflow area inside the flame stabilizer 43, and plays a role of on-duty flame, thereby being beneficial to expanding the flameout boundary and improving the combustion stability.

Although the application has been described herein with reference to the above-described illustrative embodiments thereof, the foregoing embodiments are merely preferred embodiments of the present application, and it should be understood that the embodiments of the present application are not limited to the above-described embodiments, and that numerous other modifications and embodiments can be devised by those skilled in the art that will fall within the scope and spirit of the principles of this disclosure.

Claims (10)

1. An adjustable flame holder apparatus, characterized by: the flame stabilizer comprises an actuating motor, a connecting structure assembly and a flame stabilizer assembly, wherein the flame stabilizer assembly comprises a flame stabilizer and 2 movable side walls, the connecting structure assembly is respectively connected with the actuating motor and the movable side walls, a fuel stabilizing main pipe is arranged in the flame stabilizer in an extending mode, a direct injection nozzle is arranged on an oil injection rod of the fuel stabilizing main pipe, and an outlet of the direct injection nozzle corresponds to the inner wall surface of the side wall of the flame stabilizer.

2. The adjustable flame holder apparatus of claim 1, wherein:

the flame stabilizer is a V-type flame stabilizer.

3. The adjustable flame holder apparatus of claim 2, wherein:

when the actuating motor is in the first gear, the movable side wall is all positioned outside the flame stabilizer, the flame stabilizer component is in the form of a simple V-shaped flame stabilizer, and when the actuating motor is in the second gear, only part of the movable side wall is positioned outside the flame stabilizer, and the flame stabilizer component forms a double V-shaped flame stabilizer.

4. A tunable flame holder device according to claim 2 or 3, wherein:

the inner wall surface of the tail end of the V-shaped flame stabilizer is an arc surface, and the outer wall surface of the front end of the movable side wall is an arc surface.

5. A turbine engine afterburner, characterized in that: the adjustable flame holder assembly of any of claims 1-4, further comprising a diffuser assembly, a boost barrel assembly, and a fuel supply assembly, wherein the diffuser assembly is positioned behind the turbine component, the boost barrel is positioned behind the diffuser assembly, the boost barrel and the diffuser assembly form a combustion area of the afterburner, the fuel supply assembly comprises a fuel supply system comprising a boost fuel manifold and a steady fuel manifold, the boost fuel manifold is positioned in an inner flow passage of the diffuser assembly, and the flame holder assembly is positioned in front of the flame holder assembly; the stable combustion fuel main pipe consists of a sectional ring pipe and a fuel injection rod, wherein the sectional ring pipe is positioned outside the boosting cylinder, and the fuel injection rod is arranged inside the flame stabilizer; the adjustable flame stabilizer device comprises an actuating motor and a flame stabilizer component, wherein the flame stabilizer component is positioned at the outlet end of the diffuser component, the actuating motor is positioned outside the boosting cylinder, and the actuating motor is connected with the flame stabilizer component after penetrating through the boosting cylinder.

6. The turbine engine afterburner of claim 5, wherein:

the afterburner employs 4-12 flame holder assemblies.

7. The turbine engine afterburner of claim 5, wherein:

the fuel oil main pipe fuel injection rod is arranged in the overhanging radial flame stabilizer assembly, each fuel injection rod consists of a plurality of groups of fuel injection holes, and fuel oil is injected to the inner wall surface of the V-shaped flame stabilizer through the fuel injection holes, so that a moving oil film is formed by adherence.

8. The turbine engine afterburner of claim 7, wherein:

each oil injection rod of the stable combustion fuel oil main pipe consists of 3-6 groups of direct injection nozzles, and each group of 2 direct injection nozzles form a plurality of groups of stable combustion duty flame areas along the radial direction.

9. The turbine engine afterburner of claim 8, wherein:

the included angle of the two direct injection nozzles on the oil injection rod is 100-150 degrees.

10. The turbine engine afterburner of claim 9, wherein:

the number of the fuel injection rods of the fuel stabilizing main pipe is the same as that of the overhanging radial flame stabilizer.