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-  2016 

跨声速涡轮叶顶间隙流动传热特性的数值研究
Numerical Investigations on Flow and Heat Transfer Characteristics of Transonic Turbine Blade Tips

DOI: 10.7652/xjtuxb201604022

Keywords: 跨声速叶片,叶顶间隙,传热特性,进口湍流度,数值模拟
transonic blade,blade tip,heat transfer performance,inlet turbulence intensity

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Abstract:

针对叶顶间隙的高速泄漏流及复杂的流动问题,采用求解三维Reynolds？？Averaged Navier？？Stokes(RANS)和S-A湍流模型的方法研究了跨声速流动条件下涡轮叶片顶部的流动传热特性,同时计算分析了叶顶间隙高度和进口湍流强度对顶部流动换热特性的影响。研究结果表明:叶顶间隙为0.188％动叶高度(小间隙)时,间隙泄漏流为亚声速(0.3The three？？dimensional steady Reynolds？？Averaged Navier？？Stokes (RANS) equation and the Spalart？？Allmaras turbulence model are used to investigate the high speed over？？tip leakage flow in a transonic turbine stage. Moreover, the influence of inlet turbulence intensity on heat transfer characteristics of top flows is investigated. The turbulence model is validated by a comparison with experimental data. Numerical results show that the blade tip attains the maximum heat transfer coefficient and the tip leakage flow is subsonic (0.3

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