高精度格式WCNS-E-5计算物面热流  

A High-order Accurate Scheme WCNS-E-5 Applied toBody Heat Transfer Distributions

作　　者：刘昕[1] 邓小刚[1] 毛枚良[1] 宗文刚[1] 

机构地区：[1]中国空气动力研究与发展中心,四川绵阳621000

出　　处：《计算物理》2005年第5期393-398,共6页Chinese Journal of Computational Physics

基　　金：国家杰出青年科学基金(10225208);创新研究群体科学基金(10321002)资助项目

摘　　要：采用加权紧致非线性格式WCNS_E_5,四阶精度的二阶导数差分近似以及四阶精度的边界格式构造了高精度算法,对高超声速粘性流动的物面热流进行数值研究.首先考察了壁面网格雷诺数对驻点热流的影响,然后开展了边界格式对热流计算结果影响的研究,最后对大攻角钝锥绕流进行了数值模拟.研究结果表明:WCNS_E_5能降低边界层内网格分辨率,全场高精度的WCNS_E_5计算得到的流场图像清晰、真实、分辨率高,热流值准确、可靠.A high-order accurate algorithm, which consists of WCNS-E-5 for inviscid term, fourth-order accurate scheme for viscous term and corresponding fouth-order boundary scheme, is carried out on the heat transfer distribution on body surface in a hypersonic viscous flow. The effect of grid Reynolds number on heat transfer at stagnation point and the influence of different boundary schemes on heat transfer distribution are investigated. A flow past a blunt cone with high attack angles is simulated numerically. It is shown that WCNS-E-5 is able to permit large spatial scale near the body. The physical phenomena captured by WCNS-E-5 with high-order accuracy are real, clear and high resolving in the whole flowfield. The heat transfer solutions are reliable and accurate.

关 键 词：高精度格式 加权紧致非线性格式 NAVIER-STOKES方程 

分 类 号：O354.4[理学—流体力学]