高超音速化学非平衡流的隐式格式迭代解法  

Iterative Method for Hypersonic Non-Equilibrium Flows

作　　者：王浩[1] 吴颂平[1] 陆烨[1] 

机构地区：[1]北京航空航天大学飞行器设计与应用力学系

出　　处：《北京航空航天大学学报》2002年第1期94-97,共4页Journal of Beijing University of Aeronautics and Astronautics

摘　　要：针对高超音速化学非平衡流计算中的隐式TVD格式给出了一种迭代解法 .该方法是在原有的Harten Yee格式基础上 ,在每一时间步对无粘部分进行迭代运算 ,目的是为了加速收敛 .借助对模型方程的收敛性分析 ,证明该迭代算法是收敛的 .二维数值实验表明该方法对于高马赫数时的化学非平衡流能明显提高隐式格式的计算效率 ,其计算结果是满意的 .An iterative method based on the implicit TVD schemes of Harten Yee's type is presented for the full Navier Stokes equations with chemical source terms. Only the inviscid part of the implicit scheme is updated in every iteration, it makes the iterative algorithm convenient and economical.Numerical tests upon two dimensional hypersonic non equilibrium flows with five neutral air species have been taken with the present iterative algorithm. the results are compared with the conventional non iterative ones. It is shown that the iterative algorithm accelerates the efficiency of computations. Moreover, the algorithm becomes more efficient with the increase of incoming Mach number.

关 键 词：高超音速流动 计算流体力学 隐式格式迭代法 化学非平衡流 

分 类 号：V211.3[航空宇航科学与技术—航空宇航推进理论与工程]