中文摘要：

通过对超声速湍流边界层中横向声速喷流的计算，对一种混合大涡／雷诺平均Navier-Stokes（LES／RANs）模拟方法进行了测试，该方法采用一个依赖于到壁面的距离及当地湍流参数的混合函数结合两方程k-wOJSST（shearstresstransport）湍流模型和混合尺度亚格子模型来封闭湍流项．计算结果表明：混合模拟方法能够捕捉到喷流／湍流边界层相互干扰的非定常大尺度结构，且对分离区长度、壁面静压峰值和膨胀区静压分布的计算精度要高于RANs（Reyn01ds—averagedNavier-Stokes）方法．

英文摘要：

A hybrid large eddy simulation/Reynoldsaveraged NavierStokes （LES/ RANS） method was tested by computing transverse sonic injection in supersonic turbulent boundary layer. The method combined twoequation kw SST （shear stress transport） turbu lence model and a mixedscale subgrid scale model for turbulence closure depending on wall distance and a blending function of local turbulent parameters. The results show that the hy brid method can capture the unsteady large scale structures of the jet/turbulent boundary layer interaction. Also, it provides better predictions of separation region length, wall static pres sure peak value and static pressure distribution in the expansion regions than the RANS method.