CN113551261A - Wave V type flame stabilizer - Google Patents
Wave V type flame stabilizer Download PDFInfo
- Publication number
- CN113551261A CN113551261A CN202110812824.9A CN202110812824A CN113551261A CN 113551261 A CN113551261 A CN 113551261A CN 202110812824 A CN202110812824 A CN 202110812824A CN 113551261 A CN113551261 A CN 113551261A
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- shaped
- wavy
- wave
- flame stabilizer
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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
- F23R3/38—Continuous combustion chambers using liquid or gaseous fuel characterised by the fuel supply comprising rotary fuel injection means
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Combustion Of Fluid Fuel (AREA)
- Spark Plugs (AREA)
Abstract
The invention relates to a wavy V-shaped flame stabilizer which consists of a wavy front edge, a wavy V-shaped surface and a wavy V-shaped tail edge. The advantages and the obtained beneficial effects of the invention are as follows: by adopting the wave-shaped V-shaped flame stabilizer, the flame stability is good, the flow loss is small, and the combustion efficiency is high.
Description
Technical Field
The invention relates to a wave-shaped V-shaped flame stabilizer which can be used for an afterburner of an aircraft engine and belongs to the technical field of aviation.
Background
The afterburner of the jet aircraft engine adopts a flame stabilizer to stabilize flame tissue combustion, and the performance of the flame stabilizer is a decisive influence factor of the performance of the afterburner. Most afterburners adopt V-shaped flame stabilizers with simple structures. Although the conventional V-shaped flame stabilizer is simple in structure and easy to process and manufacture, the backflow vortex is poor in stability due to the fact that the conventional V-shaped flame stabilizer generates a Karman vortex street type backflow vortex, flame stability is poor under certain conditions, combustion efficiency is reduced due to unstable local combustion, and extra flow loss is caused by the fact that the backflow vortex falls off alternately to disturbance of a flow field.
Disclosure of Invention
The invention aims to provide a wave-shaped V-shaped flame stabilizer, which is used for improving flame stability, reducing flow loss and increasing combustion efficiency.
The invention is realized by the following technical scheme.
A wavy V-shaped flame stabilizer has a wavy geometric characteristic, contains 3-5 wavelengths and is the same in cross section shape, the spreading length of the wavy V-shaped flame stabilizer is determined by a specific engine and mainly comprises a front edge, a V-shaped surface and a V-shaped tail edge, on the cross section, the front edge is obtained by rounding off the V-shaped surface, the radius of the rounded corner is 1.5-5 mm, the width of the V-shaped surface is 20-30 mm, the V-shaped included angle of the V-shaped surface is 25-40 degrees, the width of the V-shaped tail edge is 26-36 mm, the front V-shaped included angle of the V-shaped tail edge is 55-70 degrees, the rear V-shaped included angle of the V-shaped tail edge is 100-150 degrees, the width of a side flat straight section is 1.5-3 mm, the wavy geometric characteristic starts and ends at the position of a wave crest, the wave is obtained at the peak and the rounded corner of a sawtooth wave, the radius is 15-30 mm, and the amplitude of the sawtooth wave is 6-15 mm.
Compared with the prior art, the invention has the advantages that:
first, flame stability is good. The conventional V-shaped flame stabilizer generates a Karman vortex street type backflow vortex, and the backflow vortex stability is poor. A conventional V-shaped flame stabilizer is changed into a wavy V-shaped flame stabilizer, K-H type backflow vortexes are generated after the wavy V-shaped flame stabilizer, the backflow vortexes have components in the spanwise direction, and heat mass convection transmission exists between wave crest backflow regions and wave trough backflow regions, so that the flame stability is good.
Second, flow losses are small. The conventional V-shaped flame stabilizer generates a karman vortex street type backflow vortex, the wavy V-shaped flame stabilizer generates a K-H type backflow vortex, and compared with the karman vortex street type backflow vortex, the K-H type backflow vortex causes much smaller flow loss, so the flow loss is small.
Thirdly, the combustion efficiency is high. The wave-shaped V-shaped flame stabilizer generates K-H type backflow vortexes, the flame stability is good, meanwhile, the backflow vortexes have the direction component to enable heat mass convection transmission to be generated between wave crest and wave trough backflow regions, so that fuel oil in the backflow regions is atomized, evaporated and mixed more fully, stable and efficient combustion in the backflow regions is guaranteed, and the combustion efficiency is high.
Drawings
FIG. 1 is an isometric view of a wavy V-shaped flame holder of the present invention.
FIG. 2 is a side view of a wavy V-shaped flame holder of the present invention.
FIG. 3 is a top view of a wavy V-shaped flame holder of the present invention.
FIG. 4 is a front view of a wavy V-shaped flame holder of the present invention.
FIG. 5 is a rear view of a wavy V-shaped flame holder of the present invention.
FIG. 6 is a longitudinal section V of the wavy V-shaped flame stabilizer of the inventionXAnd (4) distribution.
FIG. 7 is a transverse section V of the wavy V-shaped flame stabilizer of the inventionXAnd (4) distribution.
FIG. 8 is a flow chart of a wavy V-shaped flame holder of the present invention.
FIG. 9 is a flow chart of another perspective of the wavy V-shaped flame holder of the present invention.
In the drawings, 1 is the leading edge; 2 is a V-shaped surface; and 3 is a V-shaped tail edge.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings 1 to 5 and examples.
A wavy V-shaped flame stabilizer has a wavy geometric characteristic and comprises 3-5 wavelengths, the number of the wavy V-shaped flame stabilizer is 3 in the embodiment, the cross sections of the wavy V-shaped flame stabilizer are the same, the spreading length of the wavy V-shaped flame stabilizer is determined by a specific engine, the width of the wavy V-shaped flame stabilizer is 180mm in the embodiment, the wavy V-shaped flame stabilizer mainly comprises a front edge 1, a V-shaped surface 2 and a V-shaped tail edge 3, on the cross section, the front edge 1 is obtained by chamfering the V-shaped surface 2, the fillet radius of the front edge is 1.5-5 mm, the width of the V-shaped surface 2 is 2.5mm, the width of the V-shaped surface 2 is 20-30 mm in the embodiment, the width of the V-shaped surface is 24mm in the embodiment, the V-shaped included angle of the V-shaped surface 2 is 25-40 degrees, the width of the V-shaped tail edge 3 is 30 degrees, the V-shaped tail edge 3 is 30mm in the embodiment, the front V-shaped tail edge 3 is 55-70 degrees, the V-shaped clip angle of the V-shaped tail edge 3 degrees, the embodiment is 60 degrees, the rear V-shaped clip angle of the V-shaped tail edge 3 degrees of 100-shaped clip angle of 100-150 degrees, 120 degrees in the embodiment, the width of the flat and straight section of the side face is 1.5-3 mm, the width of the flat and straight section of the side face is specifically 2mm, the wave geometric characteristics start and end at the position of a wave crest, the wave is obtained by rounding off the wave crest and the wave trough of a sawtooth wave, the radius of the fillet is 15-30 mm, the width of the sawtooth wave is specifically 18mm, the amplitude of the sawtooth wave is 6-15 mm, and the width of the sawtooth wave is specifically 12 mm.
The embodiments described above are only preferred embodiments of the invention and are not exhaustive of the possible implementations of the invention. Any obvious modifications to the above would be obvious to those of ordinary skill in the art, but would not bring the invention so modified beyond the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (2)
1. A wave-shaped V-shaped flame stabilizer is characterized by having wave-shaped geometrical characteristics, containing 3-5 wavelengths and having the same cross section shape at each part; the wavy V-shaped flame stabilizer mainly comprises a front edge (1), a V-shaped surface (2) and a V-shaped tail edge (3), wherein on the cross section, the front edge (1) is obtained by rounding the V-shaped surface (2), the radius of the fillet is 1.5-5 mm, the width of the V-shaped surface (2) is 20-30 mm, the V-shaped included angle of the V-shaped surface (2) is 25-40 degrees, the width of the V-shaped tail edge (3) is 26-36 mm, the front V-shaped included angle of the V-shaped tail edge (3) is 55-70 degrees, the rear V-shaped included angle of the V-shaped tail edge (3) is 100-150 degrees, and the width of a side flat section is 1.5-3 mm; the wave geometric characteristics start and end at the peak position, the wave is obtained by rounding off the peaks and the troughs of the sawtooth waves, the radius of the rounded corners is 15-30 mm, and the amplitude of the sawtooth waves is 6-15 mm.
2. The wavy V-shaped flame holder of claim 1, wherein the flare length of the wavy V-shaped flame holder is determined by a specific engine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110812824.9A CN113551261B (en) | 2021-07-19 | 2021-07-19 | Wave V type flame stabilizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110812824.9A CN113551261B (en) | 2021-07-19 | 2021-07-19 | Wave V type flame stabilizer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113551261A true CN113551261A (en) | 2021-10-26 |
| CN113551261B CN113551261B (en) | 2022-06-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110812824.9A Active CN113551261B (en) | 2021-07-19 | 2021-07-19 | Wave V type flame stabilizer |
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Citations (12)
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|---|---|---|---|---|
| GB1153034A (en) * | 1965-09-21 | 1969-05-21 | Rolls Royce | Combustion Apparatus |
| US20030017429A1 (en) * | 2001-07-21 | 2003-01-23 | Jae-Geol Cho | Flame stabilizer for burner for flame hydrolysus deposition |
| US20050144932A1 (en) * | 2003-12-30 | 2005-07-07 | Cohen Jeffrey M. | Augmentor with axially displaced vane system |
| US20120174588A1 (en) * | 2007-09-13 | 2012-07-12 | Rolls-Royce Deutschland Ltd & Co Kg | Gas-turbine lean combustor with fuel nozzle with controlled fuel inhomogeneity |
| CN102607061A (en) * | 2012-03-26 | 2012-07-25 | 北京航空航天大学 | Geometrical variable flame stabilizing device |
| CN104048324A (en) * | 2014-07-24 | 2014-09-17 | 南京航空航天大学 | Evaporation type flame stabilizer |
| CN105841191A (en) * | 2016-03-30 | 2016-08-10 | 中国科学院工程热物理研究所 | Tail edge structure of V-shaped flame stabilizer |
| WO2017092044A1 (en) * | 2015-12-04 | 2017-06-08 | 深圳智慧能源技术有限公司 | Flame stabilizer of venturi burner |
| CN109631084A (en) * | 2018-12-13 | 2019-04-16 | 西安航天动力研究所 | Scramjet combustor stabilizer and steady flame method |
| CN110274259A (en) * | 2019-06-13 | 2019-09-24 | 中国人民解放军空军工程大学 | A kind of plasma excitation Formula V type flameholder |
| CN112728584A (en) * | 2020-11-24 | 2021-04-30 | 南京航空航天大学 | Flame stabilizer, radial flame stabilizer and combustion chamber |
| CN213300149U (en) * | 2020-06-24 | 2021-05-28 | 南昌航空大学 | V-shaped flame stabilizer with turbulence structure capable of being premixed |
-
2021
- 2021-07-19 CN CN202110812824.9A patent/CN113551261B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1153034A (en) * | 1965-09-21 | 1969-05-21 | Rolls Royce | Combustion Apparatus |
| US20030017429A1 (en) * | 2001-07-21 | 2003-01-23 | Jae-Geol Cho | Flame stabilizer for burner for flame hydrolysus deposition |
| US20050144932A1 (en) * | 2003-12-30 | 2005-07-07 | Cohen Jeffrey M. | Augmentor with axially displaced vane system |
| US20120174588A1 (en) * | 2007-09-13 | 2012-07-12 | Rolls-Royce Deutschland Ltd & Co Kg | Gas-turbine lean combustor with fuel nozzle with controlled fuel inhomogeneity |
| CN102607061A (en) * | 2012-03-26 | 2012-07-25 | 北京航空航天大学 | Geometrical variable flame stabilizing device |
| CN104048324A (en) * | 2014-07-24 | 2014-09-17 | 南京航空航天大学 | Evaporation type flame stabilizer |
| WO2017092044A1 (en) * | 2015-12-04 | 2017-06-08 | 深圳智慧能源技术有限公司 | Flame stabilizer of venturi burner |
| CN105841191A (en) * | 2016-03-30 | 2016-08-10 | 中国科学院工程热物理研究所 | Tail edge structure of V-shaped flame stabilizer |
| CN109631084A (en) * | 2018-12-13 | 2019-04-16 | 西安航天动力研究所 | Scramjet combustor stabilizer and steady flame method |
| CN110274259A (en) * | 2019-06-13 | 2019-09-24 | 中国人民解放军空军工程大学 | A kind of plasma excitation Formula V type flameholder |
| CN213300149U (en) * | 2020-06-24 | 2021-05-28 | 南昌航空大学 | V-shaped flame stabilizer with turbulence structure capable of being premixed |
| CN112728584A (en) * | 2020-11-24 | 2021-04-30 | 南京航空航天大学 | Flame stabilizer, radial flame stabilizer and combustion chamber |
Non-Patent Citations (2)
| Title |
|---|
| 王成军: "航空发动机环管燃烧室喷雾燃烧性能研究", 《燃气涡轮试验与研究》 * |
| 金莉: "火焰稳定器综述", 《火箭推进》 * |
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| Publication number | Publication date |
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| CN113551261B (en) | 2022-06-14 |
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