In this paper, three-dimensional multiblade row unsteady Navier–Stokes simulations at a hot streak temperature ratio of 2.0 have been performed to reveal the effects of rotor tip clearance on the inlet hot streak migration characteristics in high pressure stage of a vaneless counter-rotating turbine. The numerical results indicate that the migration characteristics of the hot streak in the high pressure turbine rotor are dominated by the combined effects of secondary flow, buoyancy, and leakage flow in the rotor tip clearance. The leakage flow trends to drive the hotter fluid toward the blade tip on the pressure surface and to the hub on the suction surface. Under the effect of the leakage flow, even partial hotter fluid near the pressure surface is also driven to the rotor suction surface through the tip clearance. Compared with the case without rotor tip clearance, the heat load of the high pressure turbine rotor is intensified due to the effects of the leakage flow. And the results indicate that the leakage flow effects trend to increase the low pressure turbine rotor inlet temperature at the tip region. The air flow with higher temperature at the tip region of the low pressure turbine rotor inlet will affect the flow and heat transfer characteristics in the downstream low pressure turbine.
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e-mail: zhaoqingjun@mail.etp.ac.cn
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January 2010
Research Papers
Tip Clearance Effects on Inlet Hot Streak Migration Characteristics in High Pressure Stage of a Vaneless Counter-Rotating Turbine
Zhao Qingjun,
Zhao Qingjun
Institute of Engineering Thermophysics,
e-mail: zhaoqingjun@mail.etp.ac.cn
Chinese Academy of Sciences
, P.O. Box 2706, Beijing 100190, China
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Du Jianyi,
Du Jianyi
Institute of Engineering Thermophysics,
Chinese Academy of Sciences
, P.O. Box 2706, Beijing 100190, China
Search for other works by this author on:
Wang Huishe,
Wang Huishe
Institute of Engineering Thermophysics,
Chinese Academy of Sciences
, P.O. Box 2706, Beijing 100190, China
Search for other works by this author on:
Zhao Xiaolu,
Zhao Xiaolu
Institute of Engineering Thermophysics,
Chinese Academy of Sciences
, P.O. Box 2706, Beijing 100190, China
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Xu Jianzhong
Xu Jianzhong
Institute of Engineering Thermophysics,
Chinese Academy of Sciences
, P.O. Box 2706, Beijing 100190, China
Search for other works by this author on:
Zhao Qingjun
Institute of Engineering Thermophysics,
Chinese Academy of Sciences
, P.O. Box 2706, Beijing 100190, Chinae-mail: zhaoqingjun@mail.etp.ac.cn
Du Jianyi
Institute of Engineering Thermophysics,
Chinese Academy of Sciences
, P.O. Box 2706, Beijing 100190, China
Wang Huishe
Institute of Engineering Thermophysics,
Chinese Academy of Sciences
, P.O. Box 2706, Beijing 100190, China
Zhao Xiaolu
Institute of Engineering Thermophysics,
Chinese Academy of Sciences
, P.O. Box 2706, Beijing 100190, China
Xu Jianzhong
Institute of Engineering Thermophysics,
Chinese Academy of Sciences
, P.O. Box 2706, Beijing 100190, ChinaJ. Turbomach. Jan 2010, 132(1): 011005 (8 pages)
Published Online: September 15, 2009
Article history
Received:
June 17, 2008
Revised:
February 18, 2009
Published:
September 15, 2009
Connected Content
A correction has been published:
Erratum: “Tip Clearance Effects on Inlet Hot Streak Migration Characteristics in High Pressure Stage of a Vaneless Counter-Rotating Turbine” [Journal of Turbomachinery, 2010, 132(1), p. 011005], DOI: 10.1115/1.3103925
A companion article has been published:
Erratum: “Mobility/Impedance Methods: A Guide for Application” [ASME J. Tribol., 2014, 136(2), p. 024501; DOI: 10.1115/1.4025760]
Citation
Qingjun, Z., Jianyi, D., Huishe, W., Xiaolu, Z., and Jianzhong, X. (September 15, 2009). "Tip Clearance Effects on Inlet Hot Streak Migration Characteristics in High Pressure Stage of a Vaneless Counter-Rotating Turbine." ASME. J. Turbomach. January 2010; 132(1): 011005. https://doi.org/10.1115/1.3103925
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