高超声速热化学非平衡绕流分布式并行计算  

Distributed parallel algorithms for hypersonic thermo-chemical non-equilibrium flows

作　　者：王江峰[1] 余奇华[1] 伍贻兆[1] 

机构地区：[1]南京航空航天大学航空宇航学院,江苏南京210016

出　　处：《中国科学技术大学学报》2008年第5期529-533,共5页JUSTC

基　　金：国家自然科学基金(10402013)资助

摘　　要：讨论了非结构网格高超声速热化学非平衡绕流流场的分布式并行数值模拟方法.流动控制方程为多组分Navier-Stokes方程,化学反应模型为考虑了弱电离效应的七组元空气反应模型及双温模型.控制方程的空间离散采用Jameson有限体积法,时间推进为显式5步Runge-Kutta法.采用基于区域分裂的分布式并行计算方法,对整体计算区域进行了以各子区单元数为负载均衡条件的划分.使用PVM并行机制在PCs-Cluster机群上对二维钝头体高超声速热化学非平衡绕流进行了分布式并行计算,得到了与串行计算及文献相符合的计算结果.A distributed parallel algorithm for hypersonic thermochemical non-equilibrium flow was presented. The control equations were Navier-Stokes equations with multi-components. The chemical kinetic model was, which was popularly used with the consideration of the weak ionization effects, that of seven species and six chemical reactions with a two-temperature model. The spatial discretization for the control equations was Jameson＇s finite volume scheme, with an explicit 5-stage time step method. The decomposition of the global computational domain was realized by means of a software named METIS, in view of cell number of sub-domains load-balanced. Test cases, obtained on a PCs-Cluster system with PVM protocol, were shown for a hypersonic blunt cone body. Satisfactory numerical results were obtained and compared with those of sequential results and references.

关 键 词：高超声速 热化学非平衡 有限体积法 区域分裂 并行算法 

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]