论文部分内容阅读
在非结构混合网格上对三维高超声速化学非平衡粘性绕流进行了基于PC-Cluster的分布式并行数值模拟。本文采用区域分裂思想,研究了三维非结构混合网格区域自动分解技术,并以此为基础对高超声速化学非平衡绕流进行了并行数值计算。控制方程为多组分N-S方程,空间离散采用有限体积格心格式,时间推进为显式Runge-Kutta格式。化学非平衡动力学模型为七组元带电离反应模型,对化学反应源项进行了点隐式处理,温度场的计算采用牛顿迭代法。在PC-Cluster上对三维双椭球模型的高超声速绕流流场进行了基于区域分解技术的并行数值模拟,所得数值结果与参考文献中的结果作了对比验证。
The PC-Cluster-based distributed parallel numerical simulation of three-dimensional hypersonic chemical non-equilibrium viscous flow was performed on unstructured hybrid meshes. In this paper, we use the idea of regional split to study the automatic decomposition technique of 3D unstructured hybrid grid regions. Based on this, the parallel non-equilibrium flow of hypersonic chemistry is numerically calculated. The governing equation is the multi-component N-S equation, the finite volumetric lattice format for spatial discretization and the explicit Runge-Kutta scheme for time propulsion. The chemical non-equilibrium kinetic model is a seven-component ionization reaction model. The chemical reaction source term is implicitly treated. The temperature field is calculated by Newton’s iterative method. The parallel numerical simulation of the hypersonic flow field in a three-dimensional double-ellipsoidal model based on the domain decomposition technique was carried out on the PC-Cluster. The numerical results were compared with those in the reference.