摘要
本文提出一种高效、高分辨率求解三维复杂流场的隐式算法，并成功地用于求解高速进气道内外流场的三维、可压缩、雷诺平均Ｎａｖｉｅｒ－Ｓｔｏｋｅｓ方程组，获得了三个工况五种流场的三维数值解；与有关实验数据比较，结果令人满意。这种算法由Ｊａｍｅｓｏｎ－Ｔｕｒｋｅｌ的ＬＵ分解法和张涵信ＮＮＤ格式的数值通量耦合而成，湍流采用Ｂａｌｄｗｉｎ－Ｌｏｍａｘ模型。大量数值计算表明：该算法能捕捉到复杂的激波系，有较好的激波分辨率；迭代收敛较快，有较高的求解效率。
A new and efficient three-dimensional implicit hybrid scheme for Navier-Stokes equations is presented. The basic scheme is the coupling of the Jameson and Turkel's LU decompositions and Prof. ZhangHanxin's NND concept. The improved LU decompositions is applied to discretize the implicit part of the equations and Zhang's modified flux function to calculate the right hand side operators of the hybrid scheme.Numerical calculations were made of supersonic inlet flows with mixed external-internal compressions. Some of the computed results were compared with ayailable wind tunnel data.
出处
《空气动力学学报》
CSCD
北大核心
1996年第2期168-178,共11页
Acta Aerodynamica Sinica
基金
国家自然科学基金
国家博士后基金
关键词
激波捕捉
湍流模型
数值模拟
三维
进气道
LU scheme, NND scheme, turbulence model, shock wave capture, numerical simulation, 3-D inlet.
