In order to explore the influence of hot streak temperature ratio on the low pressure stage of a vaneless counter-rotating turbine, three-dimensional multiblade row unsteady Navier–Stokes simulations have been performed. The predicted results show that hot streaks are not mixed out by the time they reach the exit of the high pressure turbine rotor. The separation of colder and hotter fluids is observed at the inlet of the low pressure turbine rotor. After making interactions with the inner-extending and outer-extending shock waves in the high pressure turbine rotor, the hotter fluid migrates toward the pressure surface of the low pressure turbine rotor, and most of the colder fluid migrates to the suction surface of the low pressure turbine rotor. The migrating characteristics of the hot streaks are dominated by the secondary flow in the low pressure turbine rotor. The results also indicate that the secondary flow intensifies in the low pressure turbine rotor when the hot streak temperature ratio is increased. The effects of the hot streak temperature ratio on the relative flow angle at the inlet of the low pressure turbine rotor are very remarkable. The isentropic efficiency of the vaneless counter-rotating turbine decreases as the hot streak temperature ratio is increased.
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Research Papers
Influence of Hot Streak Temperature Ratio on Low Pressure Stage of a Vaneless Counter-Rotating Turbine
Zhao Qingjun,
e-mail: qingjunzhao@163.com
Zhao Qingjun
Institute of Engineering Thermophysics
, Chinese Academy of Sciences, P.O. Box 2706, Beijing 100080, China
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Tang Fei,
Tang Fei
Institute of Engineering Thermophysics
, Chinese Academy of Sciences, P.O. Box 2706, Beijing 100080, China; Graduate School of the Chinese Academy of Sciences, P.O. Box 2706, Beijing 100080, China
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Wang Huishe,
Wang Huishe
Institute of Engineering Thermophysics
, Chinese Academy of Sciences, P.O. Box 2706, Beijing 100080, China
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Du Jianyi,
Du Jianyi
Institute of Engineering Thermophysics
, Chinese Academy of Sciences, P.O. Box 2706, Beijing 100080, China
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Zhao Xiaolu,
Zhao Xiaolu
Institute of Engineering Thermophysics
, Chinese Academy of Sciences, P.O. Box 2706, Beijing 100080, China
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Xu Jianzhong
Xu Jianzhong
Institute of Engineering Thermophysics
, Chinese Academy of Sciences, P.O. Box 2706, Beijing 100080, China
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Zhao Qingjun
Institute of Engineering Thermophysics
, Chinese Academy of Sciences, P.O. Box 2706, Beijing 100080, Chinae-mail: qingjunzhao@163.com
Tang Fei
Institute of Engineering Thermophysics
, Chinese Academy of Sciences, P.O. Box 2706, Beijing 100080, China; Graduate School of the Chinese Academy of Sciences, P.O. Box 2706, Beijing 100080, China
Wang Huishe
Institute of Engineering Thermophysics
, Chinese Academy of Sciences, P.O. Box 2706, Beijing 100080, China
Du Jianyi
Institute of Engineering Thermophysics
, Chinese Academy of Sciences, P.O. Box 2706, Beijing 100080, China
Zhao Xiaolu
Institute of Engineering Thermophysics
, Chinese Academy of Sciences, P.O. Box 2706, Beijing 100080, China
Xu Jianzhong
Institute of Engineering Thermophysics
, Chinese Academy of Sciences, P.O. Box 2706, Beijing 100080, ChinaJ. Eng. Gas Turbines Power. May 2008, 130(3): 031901 (10 pages)
Published Online: April 2, 2008
Article history
Received:
June 13, 2007
Revised:
October 28, 2007
Published:
April 2, 2008
Citation
Qingjun, Z., Fei, T., Huishe, W., Jianyi, D., Xiaolu, Z., and Jianzhong, X. (April 2, 2008). "Influence of Hot Streak Temperature Ratio on Low Pressure Stage of a Vaneless Counter-Rotating Turbine." ASME. J. Eng. Gas Turbines Power. May 2008; 130(3): 031901. https://doi.org/10.1115/1.2836615
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