超声速横喷干扰湍流场数值模拟

Numerical simulation of lateral jet interaction turbulent flowfield

本文探讨了超声速平板横向喷流干扰湍流流场的数值模拟方法。分别采用Roe、Harten-Yee及AUSM+格式对三维雷诺平均Navier-Stokes方程进行离散,湍流模拟应用Baldwin-Lomax代数模型,讨论了B-L模型中Fy最大值的不同选取方式。分析了数值格式、网格划分对计算结果的影响。将来流马赫数为5、喷流马赫数为3的实验结果与计算结果进行比较,选择了与实验符合较好的数值模拟方法,为进一步利用数值计算方法研究喷流干扰流场特性奠定基础。

A numerical method of the supersonic turbulent flow on the flat plate interacted by supersonic lateral jet is presented in this paper. Three numerical schemes-Roe＇ s FDS, Harten-Yee＇s TVD and Meng-Sing Liou＇ s AUSM ＋ in spatial discretization of Reynolds-averaged Navier-Stokes equations with Baldwin-Lomax turbulence model were used for numerical simulation. Some modifications were proposed in the B-L turbulent model, so that the length of the separation region in the interaction flowfield was properly predicted. The free stream Mach number of 5.0 and jet Mach number of 3.0 are the comparison case between experimental and numerical results. It shows that this numerical method is reasonable.