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通过求解三维雷诺平均N-S(Navier-Stokes)方程和带转捩模型的二方程SST(Shear stresstransport)湍流模型,完成了带简单冷却的MARKⅡ涡轮导向叶栅流动和传热耦合计算.计算结果与试验数据的对比表明,发展的带转捩模型的数值方法明显地提高了叶栅温度和外换热系数的计算精度.同时研究发现,湍流模型对叶栅表面压力分布影响很小,而对叶栅表面温度和外换热系数影响很大;在其它边界条件相同的情况下进口湍流度对壁面压力几乎无影响,但对叶栅温度和外换热系数影响较大.
The flow and heat transfer coupling of a MARK II turbo-stator cascade with simple cooling is accomplished by solving the Navier-Stokes (3D) Navier-Stokes equations and the SST model with turbulence model. The calculated results and experimental results The comparison of the data shows that the developed numerical method with the transition model significantly improves the calculation accuracy of the temperature and external heat transfer coefficient of the cascade.At the same time, it is found that the turbulence model has little effect on the pressure distribution on the cascade surface, The surface temperature and external heat transfer coefficient are greatly affected. The inlet turbulence has almost no effect on wall pressure under the same boundary conditions, but has a great influence on the temperature and external heat transfer coefficient.