CN105020745A - Standing vortex combustion chamber with guide plate and opening blunt body - Google Patents
Standing vortex combustion chamber with guide plate and opening blunt body Download PDFInfo
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- CN105020745A CN105020745A CN201510411917.5A CN201510411917A CN105020745A CN 105020745 A CN105020745 A CN 105020745A CN 201510411917 A CN201510411917 A CN 201510411917A CN 105020745 A CN105020745 A CN 105020745A
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- opening
- bluff body
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- standing vortex
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Abstract
The purpose of the present invention is to provide a standing vortex combustion chamber, on the basis of reducing total pressure loss and raising combustion efficiency as possible, stable primary vortex and secondary vortex structures are formed in a standing vortex combustion chamber concave cavity, and a symmetrical double vortex structure is formed behind an opening blunt body to allow a fuel to be subjected to secondary combustion. The technical solution employed by the invention is that the standing vortex combustion chamber with a guide plate and the opening blunt body comprises a combustion chamber, a concave cavity, a guide piece, the opening blunt body, a front wall face, a back wall face, a combustion chamber inlet and an opening blunt body front edge, the guide piece is at one side of the front wall face of the standing vortex combustion chamber, and the opening blunt body is next to a combustion chamber main axis concave concentric periphery center position.
Description
Technical field
The invention belongs to Combustor Technologies field, particularly relate to a kind of standing vortex burning chamber with deflector and opening bluff body.
Background technology
At present for the research and practice of the combustion chamber of the equipment such as engine, generating set and gas turbine, combustion chamber mainly relies on cyclone or bluff body to stabilize the flame.Standing vortex burning chamber has been subject to extensive concern since concept proposes, the advantage such as have that structure is simple, compact, cost is low, stable operation range is wide and disposal of pollutants is few.The curved cavity of conventional standing vortex burning chamber dependence itself sets up the recirculating zone of smooth combustion, research shows that in standing vortex burning chamber cavity, double vortex structure is relative to single vortex structure, fuel can better mix with air, and fuel gas mixture time of staying in cavity is longer, is beneficial to flameholding.And have any problem in traditional stable double vortex structure aspect of formation, standing vortex burning chamber cavity inherence, and separately by the burning of fuel in cavity, full combustion of fuel can not be made.
Summary of the invention
The defect that the present invention exists to overcome prior art, the object of this invention is to provide and a kind ofly can reduce pitot loss as far as possible and improve on the basis of efficiency of combustion, formed in standing vortex burning chamber cavity and stablize main whirlpool and secondary vortex structure, and form stable symmetric double vortex structure carries out second-time burning standing vortex burning chamber for fuel at opening bluff body rear.
The technology used in the present invention solution is a kind of standing vortex burning chamber with deflector and opening bluff body, comprise combustion chamber and cavity, also comprise flow deflector, opening bluff body, front face, rear surface, combustion chamber import and opening bluff body leading edge, described flow deflector is positioned at standing vortex burning chamber cavity front face side, opening bluff body is positioned at cavity concentric circumferences center, main flow axis place, combustion chamber, and described opening bluff body front portion is set to opening bluff body leading edge.
Described cavity is provided with the identical front face of length and rear surface, and the front face distance combustion chamber inlet length of described cavity is identical with the diameter of combustion chamber import.
The flow deflector front portion of described flow deflector is 0.1 ~ 0.3 to sidewall of combustion chamber distance and the ratio of combustion chamber inlet diameter.
The flow deflector rear portion of described flow deflector is 0.05 ~ 0.15 to the distance of the front face of cavity and the ratio of cavity width.
It is 0.5 ~ 0.7 that the flow deflector rear portion of described flow deflector probes into the length in cavity with the ratio of the front face degree of depth of cavity.
The overall width of described opening bluff body is 0.2 ~ 0.3 with the ratio of combustion chamber inlet diameter.
The length of described opening bluff body is 0.1 with the ratio of cavity width.
Described opening bluff body leading edge is 0.7 to the front face distance of cavity and the ratio of cavity width.
The opening angle scope of described opening bluff body is at 30 ° ~ 50 °.
The opening of described opening bluff body is less than 2mm.
Compared with prior art, the beneficial effect that the present invention has is: this patent is reducing pitot loss as far as possible and improving on the basis of efficiency of combustion, flow deflector and opening bluff body are set in a combustion chamber, the existence of flow deflector can make to form stable double vortex structure in cavity, and two whirlpools that can form symmetry after bluff body make fuel carry out second-time burning.This patent can be widely used in engine, gas turbine and power plant's assembly ignition, special in high speed incoming flow situation, can accomplish can form the stable flow field vortex structure being beneficial to burning, smooth combustion successful on the basis as far as possible reducing pitot loss and raising efficiency of combustion.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is working state figure of the present invention.
In figure: 1, combustion chamber, 2, cavity, 3, flow deflector, 4, opening bluff body,
5, front face, 6, rear surface, 7, combustion chamber import, 8, flow deflector is anterior,
9, flow deflector rear portion, 10, opening bluff body leading edge.
Detailed description of the invention
As shown in Figure 1, a kind of standing vortex burning chamber with deflector and opening bluff body, comprise combustion chamber and cavity, also comprise flow deflector, opening bluff body, front face, rear surface, combustion chamber import and opening bluff body leading edge, described flow deflector is positioned at standing vortex burning chamber cavity front face side, and opening bluff body is positioned at cavity concentric circumferences center, main flow axis place, combustion chamber.Setting combustion chamber inlet diameter is D, and cavity front face is of a size of Hf, and rear surface is of a size of Ha; Flow deflector front portion is a to sidewall of combustion chamber distance, and flow deflector rear portion is b to the distance of the front face of cavity, and cavity width is L; The flow deflector rear portion length probeed in cavity is c, and the thickness of flow deflector is generally at 1mm.The overall width of opening bluff body is d, and total length is e, and opening size is f, is g with cavity front face spacing, and rearward openings angle is θ;
Described cavity is provided with the identical front face of length and rear surface, and the depth-width ratio of cavity is about 1, can adjust accordingly according to actual conditions.The front face distance combustion chamber inlet length of described cavity is identical with the diameter of combustion chamber import.
The flow deflector front portion of described flow deflector is to ratio a/D=0.1 ~ 0.3 of sidewall of combustion chamber distance and combustion chamber inlet diameter.The distance of flow deflector rear portion to the front face of cavity and ratio b/L=0.05 ~ 0.15 of cavity width of described flow deflector.The flow deflector rear portion of described flow deflector probes into ratio c/Hf=0.5 ~ 0.7 of the length in cavity and the front face degree of depth of cavity.The overall width of described opening bluff body and ratio d/D=0.2 ~ 0.3 of combustion chamber inlet diameter.Distance a increases can increase efficiency of combustion, and as a/D=0.3, efficiency of combustion can reach 99.99%, a/D and controls in 0.1 ~ 0.3 scope, and it is less that efficiency of combustion all can reach the impact of more than 97%, b and c on efficiency of combustion; Suitable reduction a is conducive to the position of center of vorticity in whirlpool in stable cavity, is beneficial to burning; Suitable reduction b can reduce pitot loss in flow field; Reduce c and can reduce pitot loss, but DeGrain.
The length of described opening bluff body and the ratio e/L=0.1 of cavity width.The front face distance of described opening bluff body leading edge to cavity and the ratio g/L=0.7 of cavity width.The size d of suitable reduction opening bluff body 4 and e, even if opening bluff body diminishes, the blocking action of stream field reduces, thus reduces pitot loss.Increase opening bluff body 4 and can reduce pitot loss equally apart from the distance g of cavity front face.After bluff body, the width in whirlpool is subject to the impact of bluff body width, and bluff body width d is unsuitable too small, suitably increases d and the recirculating zone scope at bluff body rear can be made to increase raising efficiency of combustion.
The opening angle θ scope of described opening bluff body is at 30 ° ~ 50 °.If θ is less than 20 °, after bluff body, two whirlpools are squeezed mutually, form the vortex structure of similar Karman vortex street, cause recirculating zone to be shaken; If θ is greater than 60 °, recirculating zone, bluff body rear sharply increases, and causes pitot loss to increase, and combustion chamber overall dimensions also can increase, and is unfavorable for engine loss of weight.
The opening f size of described opening bluff body is the smaller the better, controls be less than 2mm, and can make the symmetrical volute form stable in bluff body rear, pitot loss reduces.Bluff body windward side can be made streamlined to reduce flow losses in addition.
The impact that described physical dimension can consider the aspect such as size of engine and loss of weight adjusts.
As shown in Figure 2, part main flow is introduced cavity to the flow field schematic diagram of duty by flow deflector, makes to form stable double vortex structure in cavity.Main flow is shunted by flow deflector the gas entering cavity and is formed main whirlpool, and center of vorticity, near cavity rear surface, forms secondary whirlpool between main flow and main whirlpool, center of vorticity near front face, the flow direction of fluid be by main current flow to cavity, add the blending degree of main flow and fuel.In combustion chamber main flow axis, an opening bluff body is set near cavity position, on the one hand mixing of main flow and cavity inner fluid can strengthened, there is part main flow to be flow through by the gap in the middle of bluff body on the other hand, form stable symmetric double vortex structure at opening bluff body rear portion and carry out second-time burning for fuel.
More than show and describe general principle of the present invention, principal character and advantage of the present invention.The technical staff of the industry should understand; the present invention is not restricted to the described embodiments; what describe in above-described embodiment and description just illustrates principle of the present invention; the present invention also has various changes and modifications without departing from the spirit and scope of the present invention, and these changes and improvements all fall in the claimed scope of the invention.Application claims protection domain is defined by appending claims and equivalent thereof.
Claims (10)
1. the standing vortex burning chamber with deflector and opening bluff body, comprise combustion chamber and cavity, it is characterized in that: also comprise flow deflector, opening bluff body, front face, rear surface, combustion chamber import and opening bluff body leading edge, described flow deflector is positioned at standing vortex burning chamber cavity front face side, opening bluff body is positioned at cavity concentric circumferences center, main flow axis place, combustion chamber,, described opening bluff body front portion is set to opening bluff body leading edge.
2. the standing vortex burning chamber of band deflector according to claim 1 and opening bluff body, it is characterized in that: described cavity is provided with the identical front face of length and rear surface, the front face distance combustion chamber inlet length of described cavity is identical with the diameter of combustion chamber import.
3. the standing vortex burning chamber of band deflector according to claim 1 and opening bluff body, is characterized in that: the flow deflector front portion of described flow deflector is 0.1 ~ 0.3 to sidewall of combustion chamber distance and the ratio of combustion chamber inlet diameter.
4. the standing vortex burning chamber of band deflector according to claim 1 and opening bluff body, is characterized in that: the flow deflector rear portion of described flow deflector is 0.05 ~ 0.15 to the distance of the front face of cavity and the ratio of cavity width.
5. the standing vortex burning chamber of band deflector according to claim 1 and opening bluff body, is characterized in that: it is 0.5 ~ 0.7 that the flow deflector rear portion of described flow deflector probes into the length in cavity with the ratio of the front face degree of depth of cavity.
6. the standing vortex burning chamber of band deflector according to claim 1 and opening bluff body, is characterized in that: the overall width of described opening bluff body is 0.2 ~ 0.3 with the ratio of combustion chamber inlet diameter.
7. the standing vortex burning chamber of band deflector according to claim 1 and opening bluff body, is characterized in that: the length of described opening bluff body is 0.1 with the ratio of cavity width.
8. the standing vortex burning chamber of band deflector according to claim 1 and opening bluff body, is characterized in that: described opening bluff body leading edge is 0.7 to the front face distance of cavity and the ratio of cavity width.
9. the standing vortex burning chamber of band deflector according to claim 1 and opening bluff body, is characterized in that: the opening angle scope of described opening bluff body is at 30 ° ~ 50 °.
10. the standing vortex burning chamber of band deflector according to claim 1 and opening bluff body, is characterized in that: the opening of described opening bluff body is less than 2mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510411917.5A CN105020745A (en) | 2015-07-15 | 2015-07-15 | Standing vortex combustion chamber with guide plate and opening blunt body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510411917.5A CN105020745A (en) | 2015-07-15 | 2015-07-15 | Standing vortex combustion chamber with guide plate and opening blunt body |
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| Publication Number | Publication Date |
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| CN105020745A true CN105020745A (en) | 2015-11-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510411917.5A Pending CN105020745A (en) | 2015-07-15 | 2015-07-15 | Standing vortex combustion chamber with guide plate and opening blunt body |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107178794A (en) * | 2017-05-26 | 2017-09-19 | 哈尔滨工程大学 | A kind of single cavity standing vortex toroidal combustion chamber |
| CN108954393A (en) * | 2018-09-30 | 2018-12-07 | 上海电力学院 | A kind of advanced standing vortex burning chamber of built-in flow spoiler |
| CN110195862A (en) * | 2019-04-16 | 2019-09-03 | 华中科技大学 | A kind of small diffusion burner of separate type preheating |
Citations (5)
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|---|---|---|---|---|
| US5471840A (en) * | 1994-07-05 | 1995-12-05 | General Electric Company | Bluffbody flameholders for low emission gas turbine combustors |
| CN203823810U (en) * | 2014-02-27 | 2014-09-10 | 南昌航空大学 | Advanced vortex combustor with flow deflectors |
| CN104048325A (en) * | 2014-07-03 | 2014-09-17 | 中国科学院工程热物理研究所 | Double-cavity flameless burner |
| WO2015088687A1 (en) * | 2013-12-11 | 2015-06-18 | Siemens Aktiengesellschaft | Combustion system for a gas turbine engine |
| CN204806448U (en) * | 2015-07-15 | 2015-11-25 | 沈阳航空航天大学 | Take combustion chamber in whirlpool of guide plate and blunt body of opening |
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2015
- 2015-07-15 CN CN201510411917.5A patent/CN105020745A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5471840A (en) * | 1994-07-05 | 1995-12-05 | General Electric Company | Bluffbody flameholders for low emission gas turbine combustors |
| WO2015088687A1 (en) * | 2013-12-11 | 2015-06-18 | Siemens Aktiengesellschaft | Combustion system for a gas turbine engine |
| CN203823810U (en) * | 2014-02-27 | 2014-09-10 | 南昌航空大学 | Advanced vortex combustor with flow deflectors |
| CN104048325A (en) * | 2014-07-03 | 2014-09-17 | 中国科学院工程热物理研究所 | Double-cavity flameless burner |
| CN204806448U (en) * | 2015-07-15 | 2015-11-25 | 沈阳航空航天大学 | Take combustion chamber in whirlpool of guide plate and blunt body of opening |
Non-Patent Citations (2)
| Title |
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| 徐舟等: "入口燃气参数对驻涡燃烧室性能的影响", 《弹箭与制导学报》 * |
| 王志凯等: "先进旋涡燃烧室后钝体开口结构的数值研究", 《推进技术》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107178794A (en) * | 2017-05-26 | 2017-09-19 | 哈尔滨工程大学 | A kind of single cavity standing vortex toroidal combustion chamber |
| CN107178794B (en) * | 2017-05-26 | 2019-11-12 | 哈尔滨工程大学 | A kind of list cavity standing vortex toroidal combustion chamber |
| CN108954393A (en) * | 2018-09-30 | 2018-12-07 | 上海电力学院 | A kind of advanced standing vortex burning chamber of built-in flow spoiler |
| CN110195862A (en) * | 2019-04-16 | 2019-09-03 | 华中科技大学 | A kind of small diffusion burner of separate type preheating |
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Application publication date: 20151104 |