辐射及化学非平衡流耦合场计算方法  

Numerical Simulation of Hypersonic Flow with Non-Equilibrium Chemical Reaction and Radiation

作　　者：王逸斌[1] 伍贻兆[1] 刘学强[1] 

机构地区：[1]南京航空航天大学航空宇航学院,南京210016

出　　处：《南京航空航天大学学报》2006年第5期590-594,共5页Journal of Nanjing University of Aeronautics & Astronautics

摘　　要：把一种新的三维热辐射计算方法应用到高超声速非平衡流场的数值模拟过程中:在非结构网格上对高超声速化学非平衡流场的数值模拟过程中,耦合了辐射输运方程来求解辐射热流。控制方程为含有化学反应源项和辐射源项的三维N-S方程,数值离散格式采用了Jam eson有限体积法,辐射输运方程采用有限体积法求解。化学反应模型为7组元7反应模型,并采用了化学反应特征时间步长。本文分别对RAM C-Ⅱ和MU SES-C模型进行了计算,计算结果与参考文献的结果吻合。The viscous flow with chemical non-equilibrium and radiation effects are numerically simulated on both unstructured and hybrid grids. The governing equations are 3D N-S equations with finite rate kinetic chemical non-equilibrium and radiation source term. Jameson＇s finite volume method is used for the spatial discretization. For the radiation transfer equation （RTE）, both the spatial domain and the angular domain is discretized, and the finite volume method （FVM） is used to solve the equation in an explicit way. The chemical reaction model involves 7-species（N2,O2,N,O,NO,NO^＋ and e） and 7-reactions model. The chemical reacting time is considered in the program to accelerate the calcuation speed. Numerical results for RAMC-Ⅱ and MUSES-C are in agreement with those of the referred references. The result without and with radiation is compared.

关 键 词：计算流体力学 热辐射 有限体积法 化学非平衡流 三维N-S方程 

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]