高精度非定常激波装配法  

A High-order Unsteady Shock-fitting Scheme

作　　者：张玉东[1] 傅德薰[1] 马延文[1] 李新亮[1] 

机构地区：[1]中国科学院力学研究所非线性力学国家重点实验室

出　　处：《计算物理》2007年第5期533-536,共4页Chinese Journal of Computational Physics

基　　金：自然科学基金(No.10502052)资助项目

摘　　要：为正确模拟高超声速绕流中,来流小扰动与弓形激波之间的干扰对流动特征的影响,将弓形激波作为动边界,利用非定常特征关系处理激波处的边界条件.应用五阶精度迎风紧致格式和六阶精度的对称格式与三阶精度的R-K方法相结合,建立高精度非定常激波装配方法.采用该方法数值模拟钝锥高超声速定常流场和二维抛物外形高超声速边界层流动的感受性问题,数值模拟来流小扰动与弓形激波干扰激波后非定常扰动流场,研究扰动波进入边界层产生边界层不稳定波的特征.　Based on a high-order compact upwind scheme,a high-order shock-fitting finite difference scheme is studied for numerical simulation of the generation of boundary layer disturbance waves due to free-stream waves.Both steady and unsteady flow solutions of the receptivity problem are obtained by computing full Navier-Stokes equations.Numerical simulation of receptivity to free-stream disturbances for hypersonic boundary layers is performed.

关 键 词：感受性问题 激波装配法 迎风紧致格式 

分 类 号：O35[理学—流体力学]