CN113776082A - Air-cooled wall type support plate combined flame stabilizer and combustion chamber - Google Patents
Air-cooled wall type support plate combined flame stabilizer and combustion chamber Download PDFInfo
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- CN113776082A CN113776082A CN202111055568.XA CN202111055568A CN113776082A CN 113776082 A CN113776082 A CN 113776082A CN 202111055568 A CN202111055568 A CN 202111055568A CN 113776082 A CN113776082 A CN 113776082A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23R—GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY, e.g. GAS-TURBINE COMBUSTION CHAMBERS
- F23R3/00—Continuous combustion chambers using liquid or gaseous fuel
- F23R3/02—Continuous combustion chambers using liquid or gaseous fuel characterised by the air-flow or gas-flow configuration
- F23R3/16—Continuous combustion chambers using liquid or gaseous fuel characterised by the air-flow or gas-flow configuration with devices inside the flame tube or the combustion chamber to influence the air or gas flow
- F23R3/18—Flame stabilising means, e.g. flame holders for after-burners of jet-propulsion plants
- F23R3/20—Flame stabilising means, e.g. flame holders for after-burners of jet-propulsion plants incorporating fuel injection means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23R—GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY, e.g. GAS-TURBINE COMBUSTION CHAMBERS
- F23R3/00—Continuous combustion chambers using liquid or gaseous fuel
- F23R3/28—Continuous combustion chambers using liquid or gaseous fuel characterised by the fuel supply
- F23R3/283—Attaching or cooling of fuel injecting means including supports for fuel injectors, stems, or lances
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Pressure-Spray And Ultrasonic-Wave- Spray Burners (AREA)
- Spray-Type Burners (AREA)
Abstract
The invention discloses a gas-cooled wall type support plate combined flame stabilizer and a combustion chamber. Comprises an air-cooled wall type flame stabilizer and an air-cooled support plate flame stabilizer; the gas-cooled wall type flame stabilizer consists of a horizontally extending duct splitter plate, an inclined wall arranged at the rear end of the duct splitter plate and a straight wall arranged at the rear end of the inclined wall. The air-cooled wall type support plate flame stabilizer integrates cooling, oil supply, ignition and flame stabilization, and the wall temperature of the hot side of the combined stabilizer is cooled to be below a lower level while the high ignition performance and the flame stability of the stabilizer are ensured by utilizing the outer culvert low-temperature air cooling wall type and independently introducing cold air cooling and composite cooling of the fuel oil cooling support plate, so that the active control of the wall temperature of the support plate is realized.
Description
Technical Field
The invention relates to the technical field of aviation power propulsion systems, in particular to an air-cooled wall type support plate combined flame stabilizer and a combustion chamber.
Background
With the continuous development of advanced aero-engine afterburners and ramjets, the organization of high-efficiency, low-resistance, stable and reliable combustion in high-temperature and high-speed incoming flows has become a key requirement of engineering design. In order to achieve better ignition performance in high-temperature and high-speed incoming flows, a low-speed area is generally required to be constructed by using a flame stabilizer for on-duty ignition, such as a common wall-type cavity flame stabilizer, an evaporative flame stabilizer and the like; to achieve flame propagation in the radial direction, various forms of blunt strut flame stabilizers are commonly employed. In a traditional afterburner, an oil supply scheme of a radial support plate is that an oil spray rod is generally installed at the upstream, and in order to prevent fuel oil from coking in the oil spray rod, simplify the structure of the afterburner and shorten the length of the afterburner, the oil spray rod and a flame stabilizer of the radial support plate are integrally designed in the prior art. In advanced aircraft engines such as turbine-based combined cycle engines and the like, a multi-mode combustion chamber (stress application/stamping) of the engine often needs to work for a long time, the temperature of the included main stream gas is high, and the reliability and durability of a flame stabilizer in high-temperature gas and flame are the keys for ensuring the normal work of the engine. At present, the flame stabilizer generally adopts high-temperature-resistant alloy as a casting material, but is limited by the melting point of the material, so that the requirements of modern advanced forced and stamped combustion chambers are difficult to meet. In order to ensure efficient, stable, reliable and durable operation of the flame holder, the structure, oil supply and thermal protection schemes of conventional flame holders need to be optimally designed.
In order to meet the requirements of an advanced aeroengine afterburner/ramjet on high-efficiency, stable and reliable combustion performance, the combination of an air-cooled wall type flame stabilizer and an air-cooled support plate flame stabilizer is considered. The air-cooled wall type flame stabilizer has a wider ignition range and better flame stability as an on-duty flame stabilizer, and the cold air of the air-cooled wall type flame stabilizer can fully utilize the pressure difference between an inner culvert and an outer culvert to realize air entraining. The air-cooled support plate flame stabilizer is used as a component for radially transmitting flame, fresh cold air can be introduced from the outside (such as a turbofan duct) to be used as cold air, active control on the cooling effect of the air-cooled support plate flame stabilizer is achieved, in addition, an oil supply scheme of the air-cooled support plate flame stabilizer can be integrated into the stabilizer, a certain cooling effect on the wall surface of the stabilizer can be achieved through fuel oil, the temperature of the fuel oil before injection can be increased, and therefore the atomization and evaporation effects of the fuel oil in a main stream are improved.
Disclosure of Invention
The purpose of the invention is as follows: the invention provides an air-cooled wall type support plate combined flame stabilizer, which realizes better ignition and flame stabilization performances and realizes a comprehensive cooling effect. The invention also provides a combustion chamber with the stabilizer, and the high-efficiency, stable, reliable and durable work of the flame stabilizer is ensured under the condition that the mainstream temperature and the speed are higher and higher in the advanced afterburner and the ram combustion chamber.
The technical scheme is as follows: the invention relates to a gas-cooled wall type support plate combined flame stabilizer which comprises a gas-cooled wall type flame stabilizer and a gas-cooled support plate flame stabilizer, wherein the gas-cooled wall type flame stabilizer comprises a gas-cooled wall type flame stabilizer body and a gas-cooled support plate flame stabilizer body; the gas-cooled wall type flame stabilizer consists of a horizontally extending duct splitter plate, an inclined wall arranged at the rear end of the duct splitter plate and a straight wall arranged at the rear end of the inclined wall; the inclined wall and the straight wall form an upwardly extending wall-type step, the air-cooled support plate flame stabilizer is arranged on the lower wall surface of the bypass flow distribution plate, and the straight wall is provided with a centrifugal oil injection device and an igniter; the inclined wall is hollow to form a first air cooling cavity, and a plurality of first cooling holes are formed in the bottom wall of the first air cooling cavity; the straight wall is hollow to form a second air cooling cavity, and a plurality of second cooling holes are formed in the bottom wall of the second air cooling cavity; the flame stabilizer of the air-cooled support plate is hollow to form a cavity, and the cavity is divided into an oil-cooled cavity for feeding fuel oil and a third air-cooled cavity behind the oil-cooled cavity by a vertically arranged partition plate; a plurality of fuel oil injection holes are formed in the two side walls of the oil cooling cavity; a plurality of cooling holes are formed in the third air-cooling cavity; and a wall type cold air bent pipe is arranged at the joint of the first air cooling cavity and the second air cooling cavity, and the third air cooling cavity is communicated with the support plate cold air guide pipe.
The invention relates to a duct splitter plate of a combined stabilizer, which divides the upper side and the lower side of a combustion chamber into an outer duct and an inner duct, wherein cold air chambers are respectively arranged in the inclined wall and the straight wall of a wall-type step, and cold air entering the cold air chambers from low-temperature air in the outer duct under the driving of differential pressure is sprayed into a step backflow area through cooling holes. The support plate flame stabilizer is divided into an oil cooling cavity and an air cooling cavity by a partition plate, fuel oil in the oil cooling cavity is introduced from the outside and then is sprayed into the main stream of the culvert through uniformly distributed fuel oil spraying holes which are respectively arranged on two sides of the straight section of the tail edge. The cold air of the air cooling cavity of the support plate flame stabilizer is independently introduced by a cold air guide pipe arranged on one side of the culvert and then is sprayed into the main flow through air film holes on two sides of the air cooling cavity and a cold air jet hole on the rear wall surface. The air-cooled wall type support plate flame stabilizer integrates cooling, oil supply, ignition and flame stabilization, and the composite cooling technology of separately introducing cold air cooling and fuel oil cooling support plates by utilizing a bypass low-temperature air cooling wall type ensures higher ignition performance and flame stability of the stabilizer, and cools the wall temperature of the hot side of the combined stabilizer to be lower than a lower level to realize active control of the wall temperature of the support plates.
And a support plate fuel oil guide pipe communicated with the oil cooling cavity is arranged on the duct flow distribution plate.
The support plate cold air guide pipe is arranged on the duct flow distribution plate.
The wall type cold air bent pipe is arranged at the connecting angle of the inclined wall and the straight wall.
First cooling holes which are arranged in a crossed mode are uniformly formed in the lower wall surface of the inclined wall along the anticlockwise direction, and the hole forming direction of the first cooling holes forms an included angle of 30 degrees with the wall surface of the inclined wall; the lower wall surface of the straight wall is uniformly provided with second cooling holes which are arranged in a crossed manner along the anticlockwise direction; the opening direction of the second cooling hole and the wall surface of the straight wall form an included angle of 30 degrees.
The centrifugal oil injection device and the igniter are arranged on the central symmetry line of the straight wall; a first lining is welded between the centrifugal oil injection device and the second air cooling cavity; and a second bushing is welded between the igniter and the second air cooling cavity.
The fuel injection holes are uniformly arranged on two sides of the straight section of the tail edge of the oil cooling cavity.
Third cooling holes which are arranged in a crossed mode and form an included angle of 30 degrees with the main flow of the culvert are uniformly formed in the two sides of the third air-cooling cavity; and cold air jet holes which are arranged in a crossed manner are uniformly formed in the rear wall surface of the third air-cooling cavity.
The hole opening direction of the cold air jet hole on the central line of the rear wall surface of the third air-cooling cavity is parallel to the incoming flow direction; the hole opening directions of the cold air jet holes on the two sides of the central line of the rear wall surface of the third air cooling cavity extend towards the two sides in an inclined mode respectively.
The invention also provides a combustion chamber comprising the gas-cooled wall type support plate combined flame stabilizer.
Has the advantages that: (1) the air-cooled wall type flame stabilizer is used for on-duty ignition, the air-cooled support plate flame stabilizer is used for radial flame transmission, the pressure difference between a culvert and a wall type step backflow area is fully utilized to introduce the hot side wall surface of the culvert low-temperature air cooling wall type flame stabilizer, the independently controllable external cold air is independently introduced to cool the high-temperature side wall and the rear wall of the air-cooled support plate flame stabilizer, the oil supply mode of the air-cooled support plate flame stabilizer is changed, the traditional oil injection rod design is cancelled, the oil is changed into oil cooling cavity oil supply, and the comprehensive cooling of the hot side wall surface of the combined stabilizer is realized while better ignition and flame stabilizer are ensured; (2) the cooling hole of the air-cooled wall type stabilizer is arranged anticlockwise, namely the cooling hole is consistent with the flowing direction of the backflow zone, so that the mixing of fuel oil and air flow in the backflow zone can be accelerated, the mass exchange rate of combustion products in the backflow zone and a main flow below the backflow zone is enhanced, the ignition boundary of the stabilizer is widened, and the flame transmission capability of the radial support plate is improved; (3) the centrifugal oil injection device of the air-cooled wall type stabilizer is arranged at the rear part, so that the mixing and evaporation effects of fuel oil can be improved, and the on-duty ignition and flame stability performance can be enhanced; (4) the supporting plate flame stabilizer adopts an oil cooling cavity oil supply scheme, so that the wall surface of the front edge section of the stabilizer can be cooled, the front edge of the supporting plate stabilizer is prevented from being ablated by high-temperature main flow, the evaporation and atomization effects of the fuel in the main flow can be enhanced by improving the temperature before fuel injection, the traditional oil injection device is simplified, and the weight of a combustion chamber is reduced; (5) according to the support plate flame stabilizer, the two sides of the air cooling cavity are provided with the air film holes consistent with the main flow, and due to the constraint effect of the main flow, the cold air jet flow can form a layer of cold air film on the two side wall surfaces, so that the two side wall surfaces are prevented from being ablated by the high-temperature main flow, and the cold air film can play a good thermal protection effect on the wall surfaces even if fuel oil sprayed from the upstream is spontaneously combusted; the cold air sprayed by the cold air jet holes uniformly distributed on the rear wall surface of the air cooling cavity can generate a smaller cold air vortex area in a near-wall area under the blocking action of the backflow area and the constraint action of the main flow, the mixed air temperature of the area is lower, the oil-gas ratio is lower, partial flameout is caused to form a flame hollow area, and finally a better thermal protection effect is realized; (6) the cold air jet holes on the two sides of the central line of the rear wall surface of the air cooling cavity are arranged towards the two sides, so that the downstream flame boundary of the support plate can be widened to a certain extent, the direct impact effect of the cold air on a backflow area is reduced, and the influence of the cold air on the flame stability of the radial support plate flame stabilizer is reduced as far as possible.
Drawings
FIG. 1 is a schematic view of an air-cooled wall-supported flame holder assembly according to the present invention;
FIG. 2 is a sectional view of the wall-type cold air elbow of the combination flame holder of the present invention taken along the line A-A;
FIG. 3 is a cross-sectional view of the composite flame holder of the present invention taken along line B-B;
FIG. 4 is a cross-sectional view of the fuel injection port of the combined flame holder radial support plate of the present invention taken along the line C-C;
FIG. 5 is a schematic view of the combination flame holder of the present invention in use in an afterburner.
Detailed Description
In order to make the objects, technical solutions and effects of the present invention clearer and clearer, the technical solutions of the present invention will be further described with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1, the gas-cooled wall-supported plate combined flame holder of the present invention includes a gas-cooled wall-supported plate flame holder 1, a gas-cooled plate flame holder 2, a wall-type step 3, a centrifugal oil injection device 4, an igniter 5, a wall-type cold air bent pipe 6, a supported plate cold air lead pipe 7, and a supported plate fuel lead pipe 8. The axial direction in the present invention is the direction in which the X axis in fig. 3 extends, and is also the front-to-rear direction, the Y axis extends in the radial direction in the present invention, and is also the down-to-up direction, and the Z axis extends in the lateral direction.
The air-cooled wall type flame stabilizer 1 comprises a horizontally extending duct splitter plate 101, an inclined wall 102 arranged at the rear end of the duct splitter plate 101 and a straight wall 103 arranged at the rear end of the inclined wall 102, specifically, the duct splitter plate 101 is arranged at the front end, the duct splitter plate 101 of the air-cooled wall type flame stabilizer 1 divides a combustion chamber inlet into an inner duct channel and an outer duct channel, the inclined wall 102 is arranged behind the duct splitter plate 101 towards the upper right corner by 45 degrees (the inclined wall 102 and the duct splitter plate 101 form an included angle of 45 degrees), the straight wall 103 is arranged parallel to the duct splitter plate 101 close to the upper right end of the inclined wall 102, the inclined wall 102 and the straight wall 103 form an upwardly extending wall type step 3, as shown in figure 1, the wall type step 3 is positioned below the straight wall 103, a low-speed backflow zone can be created in the high-speed connotation main flow and used as a stable on-duty ignition zone.
The inclined wall 102 and the straight wall 103 are both of a hollow structure, the inner cavities of the inclined wall 102 and the straight wall 103 are communicated to form a cold air cavity, specifically, the inclined wall 102 is hollow to form a first air-cooling cavity 104, the bottom wall of the first air-cooling cavity 104 is provided with a plurality of first cooling holes 105, as shown in fig. 2, in the embodiment, the surface (lower wall surface) of the hot side of the inclined wall 102, which is close to the wall-type step 3, is provided with the first cooling holes 105 forming an included angle of 30 degrees with the wall surface of the inclined wall 102 in the counterclockwise direction; the hollow second air-cooling chamber 106 that forms of straight wall 103, be provided with a plurality of second cooling hole 107 on the diapire of second air-cooling chamber 106, as shown in fig. 2, in this embodiment, the hot side wall face of second air-cooling chamber 106 evenly sets up the second cooling hole 107 that cross arrangement and the wall face of straight wall 103 are 30 contained angles along anticlockwise, and second cooling hole 107 trompil direction (from top to bottom direction) extends forward.
As shown in FIG. 3, the centrifugal oil injection device 4 and the igniter 5 are installed on the flat wall 103, specifically, the centrifugal oil injection device 4 is installed at the rear end of the center line (axial center line) of the flat wall 103 above the wall-type step 3, and the igniter 5 is installed at the middle position of the center line of the flat wall 103. in the invention, the centrifugal oil injection device 4 installed on the flat wall 103 is close to the rear end of the center line, namely, the right end of the counter-clockwise rotating backflow zone, and the rear position of the centrifugal oil injection device 4 can prolong the mixing and evaporation time of the fuel oil in the wall-type step, improve the mixing and evaporation effects of the fuel oil, and is beneficial to improving the ignition and flame stability of the wall-type flame stabilizer.
As shown in fig. 2, two wall-type cold air bent pipes 6 with horizontal inlet sections are uniformly installed at the connecting corners of the inclined wall 102 and the flat wall 103, the air outlets of the wall-type cold air bent pipes 6 are respectively communicated with the first air-cooling chamber 104 and the second air-cooling chamber 106, and the wall-type cold air bent pipes 6 are used for introducing low-temperature air for cooling the hot side walls of the inclined wall 102 and the flat wall 103; in the present embodiment, two uniformly arranged cold air bends 6 are installed at the connecting angle between the inclined wall 102 and the straight wall 103. The mounting holes of the centrifugal oil injection device 4 and the igniter 5 are isolated from the second air cooling cavity 106 by bushing welding to prevent air leakage, and specifically, a first bushing 108 is welded between the centrifugal oil injection device 4 and the second air cooling cavity 106; a second bushing 109 is welded between the igniter 5 and the second gas-cooled chamber 106. As shown in fig. 3, the centrifugal injector 4 and the igniter 5 are welded and isolated between the mounting hole on the straight wall and the second gas cooling chamber 106 by a first bushing 108 and a second bushing 109, respectively.
As shown in fig. 3 and 4, the air-cooled strut flame stabilizer 2 is mounted on the lower wall surface of the bypass flow distribution plate 101, the air-cooled strut flame stabilizer 2 is hollow to form a cavity 200, the cavity 200 is divided into an oil-cooled cavity 202 for feeding fuel and a third air-cooled cavity 203 by a partition plate 201(Y-Z axis plane) which is vertically arranged, the oil-cooled cavity 202 is located at an upstream section, and the third air-cooled cavity 203 is located at a downstream section. The two side walls of the oil cooling cavity 202 are provided with a plurality of fuel injection holes 204, in the embodiment, the fuel injection holes 204 are uniformly arranged on the two sides of the straight section of the tail edge of the oil cooling cavity 202, and the fuel injection holes 204 are perpendicular to the main stream of the connotation. The third air-cooling cavity 203 is provided with a plurality of third cooling holes 205, in this embodiment, the two sides of the third air-cooling cavity 203 are uniformly provided with the third cooling holes 205 which are arranged in a cross manner and form an included angle of 30 degrees with the main flow of the content, the rear wall surface of the third air-cooling cavity 203 is uniformly provided with the cold air jet holes 206 arranged in a cross manner, the opening direction of the cold air jet hole 206 on the central line of the rear wall surface of the third air-cooling cavity 203 is parallel to the incoming flow direction, the opening directions of the cold air jet holes 206 on the two sides of the central line of the rear wall surface of the air-cooling cavity 203 extend obliquely towards the two sides, that is, the cold air jet hole 206 on the central line of the rear wall surface of the third air-cooling cavity 203 is perpendicular to the wall surface, and the angle between the hole on the two sides of the central line and the wall surface is 45 degrees.
The third air-cooling cavity 203 is communicated with a support plate air-cooling lead pipe 7, the support plate air-cooling lead pipe 7 and a fuel lead pipe 8 are installed on the top of the air-cooling support plate flame stabilizer 2, and the support plate air-cooling lead pipe 7 and the fuel lead pipe 8 extend to the outside of the combustion chamber, in the embodiment, the support plate air-cooling lead pipe 7 and the fuel lead pipe 8 both pass through the bypass flow distribution plate 101 to be communicated with the cavity 200.
When the air-cooled wall strut combined flame stabilizer is applied to an afterburner of a turbofan engine, as shown in fig. 5, high-temperature hot gas and bypass cold air exhausted by a turbine of the turbofan engine respectively enter an inner duct and an outer duct separated by a duct splitter plate 101 of the air-cooled wall strut flame stabilizer 1, the air-cooled wall strut flame stabilizer 1 is used for on-duty ignition, the radial strut flame stabilizer 2 is used for radial flame propagation, and the air-cooled strut flame stabilizer 2 is installed below the duct splitter plate 101. Part of low-temperature air of the outer duct enters the wall type cold air bent pipe 6 under the action of pressure difference, then respectively enters the first air cooling cavity 104 and the second air cooling cavity 106 in the inclined wall 102 and the flat wall 103, and then is sprayed into a near wall area of the wall type step 3 through the first cooling hole 105 and the second cooling hole 107 to form a cold air layer, the temperature of the cold air layer is low, the oil-gas ratio is low, ignition cannot be caused, burning of on-duty flame to the wall surface can be prevented, efficient cooling of the hot side of the wall surface is realized, finally, continuously entering cold air is mixed with combustion products of a backflow area, and the oxygen content and the combustion efficiency of the on-duty area are improved; in addition, because the angles of the first cooling holes 105 and the second cooling holes 107 are consistent with the direction of the backflow zone in the wall-type step 3, the mass exchange rate of combustion products in the backflow zone and a high-temperature main flow below the backflow zone can be accelerated, the mixing and evaporation effects of fuel oil in the on-duty zone can be improved, the on-duty flameout range of the on-duty zone can be widened, and the flame transfer capability of the on-duty zone in the radial direction can be enhanced.
The oil cooling cavity 202 and the air cooling cavity 203 of the air cooling strut flame stabilizer 2 are respectively and independently led in from the outside by the strut fuel oil leading pipe 8 and the strut air cooling leading pipe 7, the air cooling can be actively led in from a fan duct of the engine, and the active control of the cooling effect is realized by controlling the amount of the air cooling. After the fuel oil enters the oil cooling cavity 202, the fuel oil can stay for a long time, and the high-temperature fuel gas which contains the main flow can be heated to a higher temperature before the fuel oil is injected, so that the atomization and evaporation rates of the injected fuel oil entering the main flow can be improved, and the flame stability of the support plate stabilizer can be enhanced. In addition, the low-temperature fuel entering the oil cooling cavity 202 can reduce the wall temperature of the leading edge section support plate stabilizer, and the thermal protection effect is achieved. After cold air enters the air cooling cavity 203, after a part of the cold air is sprayed through the third cooling holes 205 on the two side wall surfaces, a layer of cold air film is formed in the near-wall area due to the constraint of the main flow, and the ablation of the main flow high-temperature gas on the wall surface can be combined; the other part of cold air is sprayed into the downstream of the support plate through the cold air jet holes 206 on the rear wall surface, and a series of cold air vortices are formed in the near-wall area under the combined action of the main flow and the backflow area, so that the mixture temperature and the oil-gas ratio of the near-wall area are lower, the area is locally flameout to generate a flame hollow area, and finally, the high-efficiency thermal protection on the rear wall surface is realized; the two parts of cold air are finally mixed with the fuel gas at the downstream of the support plate, so that the oxygen content of the afterburner is improved, and the combustion efficiency of the afterburner is improved.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, and the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in the embodiments without departing from the spirit and principles of the invention.
Claims (10)
1. A gas-cooled wall type support plate combined flame stabilizer is characterized by comprising a gas-cooled wall type flame stabilizer (1) and a gas-cooled support plate flame stabilizer (2); the gas-cooled wall type flame stabilizer (1) consists of a horizontally extending duct splitter plate (101), an inclined wall (102) arranged at the rear end of the duct splitter plate and a straight wall (103) arranged at the rear end of the inclined wall (102); the inclined wall (102) and the straight wall (103) form an upwardly extending wall-type step (3), the air-cooled strut flame stabilizer (2) is mounted on the lower wall surface of the bypass flow distribution plate (101), and a centrifugal oil injection device (4) and an igniter (5) are mounted on the straight wall (103); the inclined wall (102) is hollow to form a first air-cooling cavity (104), and a plurality of first cooling holes (105) are formed in the bottom wall of the first air-cooling cavity (104); the straight wall (103) is hollow to form a second air cooling cavity (106), and a plurality of second cooling holes (107) are formed in the bottom wall of the second air cooling cavity (106); the air-cooled support plate flame stabilizer (2) is hollow to form a cavity (200), and the cavity (200) is divided into an oil-cooled cavity (202) for feeding fuel oil and a third air-cooled cavity (203) behind the oil-cooled cavity (202) by a vertically arranged partition plate (201); a plurality of fuel oil injection holes (204) are formed in two side walls of the oil cooling cavity (202); a plurality of cooling holes are formed in the third air-cooling cavity (203); the connecting part of the first air cooling cavity (104) and the second air cooling cavity (106) is provided with a wall type cold air bent pipe (6), and the third air cooling cavity (203) is communicated with a support plate cold air guide pipe (7).
2. The air-cooled wall and strut combination flame holder as claimed in claim 1, wherein the bypass splitter plate (101) is provided with strut fuel oil conduits (8) communicating with the oil-cooled chamber (202).
3. The air-cooled wall strip combination flame holder of claim 1, wherein the strip cold gas duct (7) is mounted on the bypass splitter plate (101).
4. The stave combination flame stabilizer of claim 1 wherein said wall cold bend (6) is disposed at a junction angle of said slanted wall (102) and said straight wall (103).
5. The air-cooled wall type support plate combination flame holder of claim 1, wherein the lower wall surface of the inclined wall (102) is uniformly provided with first cooling holes (105) which are arranged in a cross manner along a counterclockwise direction, and the opening direction of the first cooling holes (105) forms an included angle of 30 degrees with the wall surface of the inclined wall (102); the lower wall surface of the straight wall (103) is uniformly provided with second cooling holes (107) which are arranged in a crossed manner along the anticlockwise direction; the opening direction of the second cooling hole (107) and the wall surface of the straight wall (103) form an included angle of 30 degrees.
6. The air-cooled wall strip combination flame holder of claim 1, wherein the centrifugal oil spray (4) and the igniter (5) are installed on the central symmetry line of the straight wall (103), and the oil spray (4) is located behind the igniter (5); a first lining (108) is welded between the centrifugal oil injection device (4) and the second air cooling cavity (106); a second bushing (109) is welded between the igniter (5) and the second air-cooling cavity (106).
7. The air-cooled wall and plate combination flame holder of claim 1, wherein the fuel injection holes (204) are uniformly arranged on both sides of the straight section of the trailing edge of the oil-cooled chamber (202).
8. The air-cooled wall type support plate combined flame stabilizer of claim 5, characterized in that the two sides of the third air-cooled cavity (203) are uniformly provided with third cooling holes (205) which are arranged in a cross way and form an included angle of 30 degrees with the main flow of the content; the rear wall surface of the third air-cooling cavity (203) is uniformly provided with cold air jet holes (206) which are arranged in a crossed manner.
9. The air-cooled wall-supported strip combination flame holder of claim 8, wherein the opening direction of the cold air jet holes (206) on the center line of the rear wall surface of the third air-cooled chamber (203) is parallel to the incoming flow direction; the opening directions of the cold air jet holes (206) on the two sides of the central line of the rear wall surface of the third air-cooling cavity (203) respectively extend towards the two sides in an inclined mode.
10. A combustion chamber comprising the gas-cooled stave integrated flame stabilizer of claim 1.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111055568.XA CN113776082B (en) | 2021-09-09 | 2021-09-09 | Air-cooled wall type support plate combined flame stabilizer and combustion chamber |
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| CN202111055568.XA CN113776082B (en) | 2021-09-09 | 2021-09-09 | Air-cooled wall type support plate combined flame stabilizer and combustion chamber |
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| CN113776082A true CN113776082A (en) | 2021-12-10 |
| CN113776082B CN113776082B (en) | 2023-01-06 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114877374A (en) * | 2022-04-21 | 2022-08-09 | 南京航空航天大学 | Integrated afterburning support plate and afterburning chamber using same |
| CN115013839A (en) * | 2022-05-12 | 2022-09-06 | 中国航发四川燃气涡轮研究院 | Afterburning chamber fuel spray lance structure |
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| CN110762555A (en) * | 2019-10-24 | 2020-02-07 | 南京航空航天大学 | Pneumatic auxiliary type flame stabilizer with concave cavity supporting plate |
| CN110822475A (en) * | 2019-10-28 | 2020-02-21 | 南京航空航天大学 | On-duty flame stabilizer using air cooling structure to match ignition position and design method |
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| CN102538010A (en) * | 2012-02-12 | 2012-07-04 | 北京航空航天大学 | Afterburner integrated with stabilizer and worm wheel rear rectification support plate |
| CN105650677A (en) * | 2016-02-26 | 2016-06-08 | 南京航空航天大学 | Integrally-designed flame stabilizer with novel cooling structure |
| CN205825114U (en) * | 2016-06-16 | 2016-12-21 | 上海和兰动力科技有限公司 | There is the cannular combustion chamber of the gas turbine of self-cooling function |
| CN110762555A (en) * | 2019-10-24 | 2020-02-07 | 南京航空航天大学 | Pneumatic auxiliary type flame stabilizer with concave cavity supporting plate |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114877374A (en) * | 2022-04-21 | 2022-08-09 | 南京航空航天大学 | Integrated afterburning support plate and afterburning chamber using same |
| CN114877374B (en) * | 2022-04-21 | 2023-07-07 | 南京航空航天大学 | Integrated afterburner support plate and afterburner using same |
| CN115013839A (en) * | 2022-05-12 | 2022-09-06 | 中国航发四川燃气涡轮研究院 | Afterburning chamber fuel spray lance structure |
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|---|---|
| CN113776082B (en) | 2023-01-06 |
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