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基于粘性全N S方程,利用有限体积法进行数值离散,对Ⅰ到Ⅵ六种类型的激波-激波干扰现象进行了数值模拟,其中采用了二阶Harten TVD格式,LU隐式算法以及Baldwin Lomax代数湍流模型。每种类型都得到了清晰的干扰流场结构,其中Ⅳ型干扰的模拟结果与实验结果进行了比较,符合较好。数值模拟结果的对比指出,由入射位置差异引起的不同类型激波-激波干扰结构有很大不同,对壁面压强分布的影响也存在较大差异。
Based on the viscous NS equation, the finite volume method is used to carry out the numerical discretization, and six types of shock-shock interferences from Ⅰ to Ⅵ are numerically simulated. The second-order Harten TVD scheme, LU implicit algorithm and Baldwin Lomax Algebraic turbulence model. Each type has a clear interference flow field structure, in which the type IV interference simulation results and experimental results were compared, in good agreement. The comparison of numerical simulation results shows that the different types of shockwaves and shockwaves caused by the difference in incident location have very different structures, and the influence on wall pressure distribution is also quite different.