Method for impingement air cooling for gas turbines
원문보기
IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0071156
(2008-02-15)
|
등록번호 |
US-8152463
(2012-04-10)
|
우선권정보 |
DE-10 2007 008 319 (2007-02-16) |
발명자
/ 주소 |
- Haselbach, Frank
- Janke, Erik
- Taege, Jens
- Janetzke, Timm
- Nitsche, Wolfgang
- Reyer, Matthias
|
출원인 / 주소 |
- Rolls-Royce Deutschland Ltd & Co KG
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대리인 / 주소 |
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인용정보 |
피인용 횟수 :
2 인용 특허 :
10 |
초록
▼
In impingement air cooling of gas turbine components, cooling air velocity packs of a certain amplitude and a given frequency are applied to impingement air openings, with intervallic annular swirl structures being formed which penetrate a cross-flow and hit a component to be cooled with high intens
In impingement air cooling of gas turbine components, cooling air velocity packs of a certain amplitude and a given frequency are applied to impingement air openings, with intervallic annular swirl structures being formed which penetrate a cross-flow and hit a component to be cooled with high intensity, thus providing for efficient cooling. In order to obtain annular swirl structures with optimum cooling effect, the Strouhal number, which is determined by a ratio of amplitude, frequency of the velocity packs and size of impingement air cooling openings, ranges between 0.2 and 2.0, and preferably between 0.8 and 1.2.
대표청구항
▼
1. A method for impingement air cooling for gas turbines, comprising: providing a first partition wall having a plurality of impingement air openings;providing a separate second wall spaced apart from the first partition wall to form a cooling air duct between the first partition wall and the second
1. A method for impingement air cooling for gas turbines, comprising: providing a first partition wall having a plurality of impingement air openings;providing a separate second wall spaced apart from the first partition wall to form a cooling air duct between the first partition wall and the second wall, the first partition wall separating a cooling air supply from the cooling air duct, the second wall separating the cooling air duct from a hot gas flow;supplying separate jets of cooling air via the impingement air openings to hit an area of the second wall to impingement cool that area of the second wall;removing the cooling air from the cooling air duct between the two walls in the form of a cross-flow;creating intervallic annular swirl structures with high cooling effect in the cross-flow, with these annular swirl structures penetrating the cross-flow with high intensity and frequency and hitting the second wall area to be impingement cooled prior to any mixing of the cooling air and the hot gas flow; andsupplying the cooling air to the impingement air openings in cooling air velocity packs (Vcool (t)) having a certain amplitude (Vcool) and frequency (f). 2. The method in accordance with claim 1, wherein the formation and intensity of the annular swirl structures is determined by the amplitude of the cooling air velocity packs and a size (D) of the impingement air openings. 3. The method in accordance with claim 2, wherein the ratio of the frequency (f), the amplitude (Vcool) of the cooling air velocity packs and the size (D) of the impingement air openings are selected to derive a Strouhal number Sr, for excitation of the annular swirl structures, of between 0.2 and 2.0, where the Strouhal number Sr=f×D/Vcool. 4. The method in accordance with claim 3, wherein the derived Strouhal number ranges between 0.8 and 1.2. 5. The method in accordance with claim 4, wherein a distance between the first partition wall and the second wall area to be cooled is selected to create resonance conditions between the annular swirls at the impingement air openings and reflected pressure waves in the cooling air duct, to intensify the annular swirl structures. 6. The method in accordance with claim 5, wherein the periodic generation of the annular swirl structures is interrupted at regular intervals. 7. The method in accordance with claim 1, wherein the ratio of the frequency (f), the amplitude (Vcool) of the cooling air velocity packs and the size (D) of the impingement air openings are selected to derive a Strouhal number Sr, for excitation of the annular swirl structures, of between 0.2 and 2.0, where the Strouhal number Sr=f×D/Vcool. 8. The method in accordance with claim 7, wherein the derived Strouhal number ranges between 0.8 and 1.2. 9. The method in accordance with claim 8, wherein a distance between the first partition wall and the second wall area to be cooled is selected to create resonance conditions between the annular swirls at the impingement air openings and reflected pressure waves in the cooling air duct, to intensify the annular swirl structures. 10. The method in accordance with claim 9, wherein the periodic generation of the annular swirl structures is interrupted at regular intervals. 11. The method in accordance with claim 1, wherein a distance between the first partition wall and the second wall area to be cooled is selected to create resonance conditions between the annular swirls at the impingement air openings and reflected pressure waves in the cooling air duct, to intensify the annular swirl structures. 12. The method in accordance with claim 11, wherein the periodic generation of the annular swirl structures is interrupted at regular intervals.
이 특허에 인용된 특허 (10)
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Banthin ; Clifford R., Apparatus for and method of suppressing infrared radiation emitted from gas turbine engine.
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Haumann Jurgen (Rekingen CHX) Knopfli Alfred (Othmarsingen CHX) Sattelmayer Thomas (Mandach CHX) Tresch Rudolf (Seon CHX), Apparatus for impingement cooling.
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Wettstein Hans (Fislisbach CHX), Baffle-cooled wall part.
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Schulte-Werning Burkhard,CHX, Combustion chamber.
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Luxton Russell E. (Adelaide AUX) Nathan Graham J. (Happy Valley AUX), Controlling the motion of a fluid jet.
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Putz Heinrich,DEX, Cooled heat shield for gas turbine combustor.
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Weigand Bernhard,DEX, Cooling system for the leading-edge region of a hollow gas-turbine blade.
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Senior Peter,GBX, High efficiency heat transfer structure.
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Correia Victor H. (Scotia NY) Brown Theresa A. (Ballston Lake NY) Chiu R. Paul (Scotia NY), Impingement cooling and cooling medium retrieval system for turbine shrouds and methods of operation.
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Gordon Anderson CH; Jorgen Ferber DE; Rainer Hocker DE; Fathi Tarada CH; Bernhard Weigand DE, Turbine blade wall section cooled by an impact flow.
이 특허를 인용한 특허 (2)
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Janetzke, Timm, Apparatus and method for the creation of an impingement jet generating annular swirls as well as turbomachine with an apparatus of this type.
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Kottilingam, Srikanth Chandrudu; Morgan, Victor John; Lacy, Benjamin Paul; Harris, Jr., John Wesley; Schick, David Edward, Three-dimensional printing process, swirling device and thermal management process.
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