CN204404237U - A kind of air swirling device be arranged in gas-turbine combustion chamber nozzle - Google Patents
A kind of air swirling device be arranged in gas-turbine combustion chamber nozzle Download PDFInfo
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- CN204404237U CN204404237U CN201420631405.0U CN201420631405U CN204404237U CN 204404237 U CN204404237 U CN 204404237U CN 201420631405 U CN201420631405 U CN 201420631405U CN 204404237 U CN204404237 U CN 204404237U
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- blade
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- swirling device
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- combustion chamber
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Abstract
Be arranged on the air swirling device in gas-turbine combustion chamber nozzle, belong to gas turbine technology field.The utility model comprises center fuel passage and peripheral annular air duct.Peripheral axial annular air duct is furnished with main air swirl-flow devices vertically in conical inner body outside, the blade of air swirling device is provided with notch, original position is positioned at the change point of blade suction lateral lobe bending tablet angle, the tangent plane of notch with the intersection of blade suction side perpendicular to the horizontal plane at axis of runner blade place, and the direction of tangent plane is along the tangential direction of blade suction lateral bend angle change point, notch length is through to blade afterbody.The utility model can ensure the swirl strength of air duct outer circumferential side, increase the air velocity of air duct inner circumferential side, the mixing effect of the distribution of coupling nozzle exit velocity and fuel-air, conservative control combustion zone, maintain combustion chamber flow field structure, thus ensure the stability of burning and good Exit temperature distribution.
Description
Technical field
The utility model relates to a kind of air swirling device be arranged in gas-turbine combustion chamber nozzle, particularly relates to the low-pollution burning chamber of gas turbine nozzle using gas fuel.
Background technology
In the energy resource structure that China is current, the thermal power generation of traditional coal combustion technology is adopted to occupy most share.But it is low that this traditional generation technology exists generating efficiency, pollutant emission high (especially NOx emission), expends the shortcomings such as freshwater resources are many.Be that the gas turbine power generation technology of fuel is as one of clean energy technology with natural gas, can while meeting generation load requirement, effectively reduce the discharge of pollutant, this wherein gas-turbine combustion chamber nozzle design for tissue burning, reduce pollutant emission particularly important.
In gas-turbine combustion chamber, fuel gas and air realize the change of premix velocity profile by nozzle, reach rational VELOCITY DISTRIBUTION at jet expansion, and mate rational fuel-air mixture example, enter combustion chamber tissue burning.Current, to the design form of gas-turbine combustion chamber nozzle, such as patent CN 100567823C, adopts the notched air swirling vanes in bottom, improves the speed of air duct inner circumferential side, coupling nozzle exit velocity type and fuel-air mixture example.
But owing to there is breach bottom air swirling vanes, the air flow deflector angle of passage inner circumferential side is little, and swirl strength is weak, the mixing effect of this side fuel and air is caused to be deteriorated, the tissue of impact burning and the generation of pollutant.Therefore, more rationally effective gas-turbine combustion chamber form of nozzle is still needed to organize burning and control polluted articles discharge.
Utility model content
For solving problems of the prior art, the utility model provides a kind of air swirling device be arranged in gas-turbine combustion chamber nozzle, make it can ensure the swirl strength of passage outer circumferential side air-flow on the one hand, passage inner circumferential side airflow direction is led back to axis simultaneously, increase the air velocity of air duct inner circumferential side, ensure that nozzle exit velocity distribution is reasonable, fuel-air blending is even.Can also mate on the other hand the mixing effect of nozzle exit velocity distribution, fuel and air, conservative control combustion zone, maintains combustion chamber flow field structure, thus ensures the stability of burning and good Exit temperature distribution.
The technical scheme that the utility model adopts is as follows: a kind of air swirling device be arranged in gas-turbine combustion chamber nozzle, this air swirling device adopts axial blade formula structure, it is characterized in that: the blade of air swirling device is provided with notch, the original position of this notch is positioned at blade suction lateral bend angle change point, the tangent plane of this notch with the intersection of blade suction side perpendicular to the horizontal plane at axis of runner blade place, and the direction of tangent plane is along the tangential direction of blade suction lateral bend angle, notch length is through to blade afterbody, notch radial depth is 20% ~ 95% of blade height.
In technique scheme, described blade peripherally annular air channel is evenly arranged, and blade number is between 6 ~ 12.
Described air swirling device adopts quill shaft to leaf structure, and is connected with center fuel passage by fuel orifice.
The utility model compared with prior art, have the following advantages and high-lighting effect: 1. the utility model can ensure the swirl strength of passage outer circumferential side air-flow, passage inner circumferential side airflow direction is led back to axis simultaneously, the rotational flow air axial velocity of air duct inner circumferential side is increased, reduce conical inner body boundary-layer to the impact of nozzle exit velocity type, ensure air duct inner circumferential side velocity profile and fuel-air blending coupling, conical inner body downstream does not produce recirculating zone, improves burning reliability.2. the adjustment of the original position in paddle cutout portion of the present utility model, incision length, otch radial depth can provide wider design space for nozzle air swirl-flow devices, meet the needs of different fuel and air blending, the VELOCITY DISTRIBUTION of nozzle center's cone to nozzle outlet portion can be improved.
Accompanying drawing explanation
Fig. 1 is the structural principle schematic diagram of the gas-turbine combustion chamber nozzle being furnished with air swirling device.
Fig. 2 is the three-dimensional structure sectional view of Fig. 1.
Fig. 3 is the three-dimensional structure schematic diagram of air swirling device of the present utility model.
Fig. 4 is the three-dimensional structure schematic diagram (representing that notch is in the position of blade suction surface) of the single swirl vane of the blade construction of air swirling device of the present utility model.
Fig. 5 is three-dimensional three-dimensional structure schematic diagram (indicating the position of notch at pressure face) of single swirl vane of the blade construction of air swirling device of the present utility model.
Fig. 6 is the single swirl vane top view of the blade construction of air swirling device of the present utility model.
In figure, symbol description is as follows: 1-center fuel passage; 2-peripheral annular air duct; 3-conical inner body; 4-air swirling device; 5-notch; 6-fuel orifice; 7-blade suction lateral bend angle change point; 8-intersection; 9-nozzle contraction section; 10-blade suction lateral bend angle tangent line; 11-blade suction side; 12-blade pressure side; 13-tangent plane; 14-horizontal plane.
Detailed description of the invention
Below in conjunction with accompanying drawing, principle of the present utility model, structure and detailed description of the invention are described further.
Fig. 1, Fig. 2 and Fig. 3 are the structural principle schematic diagram of the gas-turbine combustion chamber nozzle being furnished with air swirling device, air swirling device is arranged on the upstream of the conical inner body 3 in peripheral annular air duct 2, this air swirling device 4 adopts axial blade formula structure, preferably adopt quill shaft to leaf structure, and peripherally annular air channel 2 is evenly arranged, be connected with center fuel passage 1 by fuel orifice 6, blade number is generally between 6 ~ 12.
The blade of air swirling device 4 is provided with notch 5, original position is positioned at blade suction lateral bend angle change point 7, the tangent plane 13 of notch 5 with the intersection 8 of blade suction side 11 perpendicular to the horizontal plane 14 at axis of runner blade place, and the direction of tangent plane 13 is along tangent line 10 direction of blade suction lateral bend angle change point 7, notch 5 length is through to blade afterbody, and notch 5 radial depth is 20% ~ 95% of blade height.
Air swirling device 4 is in the design process according to the different requirements of concrete aerodynamic demands and fuel blending, and blade suction lateral bend angle [alpha] is also different.Blade, after integral casting forming, goes out the structure of notch by cutting processing.Mould during blade integral casting is in different leaf height directions, and angle of bend is all increased to α from 0, then is decreased to 0 from α.The change point 7 of blade suction lateral bend angle is original position, cutting cuts out tangent plane 13 along tangent line 10 direction of blade suction lateral bend angle change point 7 from the intersection 8 at original position place, tangent plane 13 with the intersection 8 of blade suction side 11 perpendicular to the horizontal plane 14 at axis of runner blade place.(see Fig. 4, Fig. 5 and Fig. 6)
The inner circumferential side angle of bend of paddle cutout portion 5 suction side 11 is changed to 0 degree from α.
Operation principle of the present utility model is as follows:
Gas fuel enters axial centre fuel channel 1, and right positions on the blade being entered air swirling device 4 by the perforate of conical inner body 3 wall, is sprayed from blade both sides fuel orifice 6.Air enters peripheral axial annular air duct 2, mixes with fuel in air swirling device 4 front end, and acts on generation eddy flow through air swirling device 4, and mixed effect strengthens.After arriving notch 5 position away from the fuel of the air duct outer circumferential side of conical inner body 3 and air Mixture, original swirl strength is kept to export to air swirling device 4; Press close to after the fuel of the air duct inner circumferential side of conical inner body 3 and air Mixture arrive notch 5 position, bending blade angle is reverse, and gaseous mixture velocity attitude deflect back axis to air swirling device 4 and exports.Air duct internal and external circumferential surveys fuel and air Mixture in air swirling device 4 exit blending, through nozzle contraction section 9 until jet expansion.Thus form nozzle exit velocity distribution and the fuel-air mixing effect of coupling, ensure the stability of burning and good Exit temperature distribution.
Claims (3)
1. one kind is arranged on the air swirling device in gas-turbine combustion chamber nozzle, this nozzle comprises center fuel passage (1), conical inner body (3) and peripheral annular air duct (2), described air swirling device is arranged on the upstream of the conical inner body (3) in peripheral annular air duct (2), this air swirling device (4) adopts axial blade formula structure, it is characterized in that: the blade of air swirling device (4) is provided with notch (5), the original position of this notch is positioned at the change point (7) of blade suction lateral lobe bending tablet angle [alpha], the tangent plane (13) of notch (5) with the intersection (8) of blade suction side (11) perpendicular to the horizontal plane (14) at axis of runner blade place, and the direction of tangent plane (13) is along tangent line (10) direction of blade suction lateral bend angle change point (7), notch (5) length is through to blade afterbody, notch (5) radial depth is 20% ~ 95% of blade height.
2. a kind of air swirling device be arranged in gas-turbine combustion chamber nozzle as claimed in claim 1, is characterized in that: described blade peripherally annular air channel (2) is evenly arranged, and blade number is between 6 ~ 12.
3. a kind of air swirling device be arranged in gas-turbine combustion chamber nozzle as claimed in claim 1 or 2, it is characterized in that: air swirling device (4) adopts quill shaft to leaf structure, and is connected with center fuel passage (1) by fuel orifice (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420631405.0U CN204404237U (en) | 2014-10-28 | 2014-10-28 | A kind of air swirling device be arranged in gas-turbine combustion chamber nozzle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420631405.0U CN204404237U (en) | 2014-10-28 | 2014-10-28 | A kind of air swirling device be arranged in gas-turbine combustion chamber nozzle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204404237U true CN204404237U (en) | 2015-06-17 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420631405.0U Withdrawn - After Issue CN204404237U (en) | 2014-10-28 | 2014-10-28 | A kind of air swirling device be arranged in gas-turbine combustion chamber nozzle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204404237U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104329688A (en) * | 2014-10-28 | 2015-02-04 | 北京华清燃气轮机与煤气化联合循环工程技术有限公司 | Air swirl device arranged in spray nozzle of combustion chamber of gas turbine |
| CN109708144A (en) * | 2019-01-25 | 2019-05-03 | 中国科学院工程热物理研究所 | A kind of cyclone |
| CN113701194A (en) * | 2021-08-16 | 2021-11-26 | 中国航发沈阳发动机研究所 | Premixing device for combustion chamber of gas turbine |
-
2014
- 2014-10-28 CN CN201420631405.0U patent/CN204404237U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104329688A (en) * | 2014-10-28 | 2015-02-04 | 北京华清燃气轮机与煤气化联合循环工程技术有限公司 | Air swirl device arranged in spray nozzle of combustion chamber of gas turbine |
| CN104329688B (en) * | 2014-10-28 | 2017-11-03 | 北京华清燃气轮机与煤气化联合循环工程技术有限公司 | A kind of air swirling device being arranged in gas-turbine combustion chamber nozzle |
| CN109708144A (en) * | 2019-01-25 | 2019-05-03 | 中国科学院工程热物理研究所 | A kind of cyclone |
| CN109708144B (en) * | 2019-01-25 | 2024-03-01 | 中国科学院工程热物理研究所 | Cyclone device |
| CN113701194A (en) * | 2021-08-16 | 2021-11-26 | 中国航发沈阳发动机研究所 | Premixing device for combustion chamber of gas turbine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Air swirl device arranged in spray nozzle of combustion chamber of gas turbine Effective date of registration: 20161104 Granted publication date: 20150617 Pledgee: Tsinghua Holdings Co., Ltd. Pledgor: Beijing Huatsing Gas Turbine & IGCC Technology Co., Ltd. Registration number: 2016990000853 |
|
| PLDC | Enforcement, change and cancellation of contracts on pledge of patent right or utility model | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150617 Effective date of abandoning: 20171103 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20150617 Effective date of abandoning: 20171103 |
|
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20191211 Granted publication date: 20150617 Pledgee: Tsinghua Holdings Co., Ltd. Pledgor: Beijing Huatsing Gas Turbine & IGCC Technology Co., Ltd. Registration number: 2016990000853 |
|
| PC01 | Cancellation of the registration of the contract for pledge of patent right |