用BGK格式对平面可压缩自由混合剪切流动的数值模拟  

Numerical Simulation of Plane Compressible Free Mixing Layer with BGK Scheme

作　　者：李启兵[1] 苏铭德[1] 

机构地区：[1]清华大学工程力学系,北京100084

出　　处：《空气动力学学报》2000年第2期229-235,共7页Acta Aerodynamica Sinica

基　　金：国家自然科学基金;国家攀登计划;国家教委博士点基金

摘　　要：本文介绍了BGK Boltzmann格式的构造与用有限体积法计算网格内宏观量的方法。文中还介绍了可压缩平面混合剪切层计算域在不同出口马赫数下的边界条件。然后将上述方法应用于四种不同情况的可压缩平面混合剪切层的数值摸拟。还详细介绍了计算结果 ,并与其他方法所得的的结果以及实验数据进行比较。表明本文的结果较好 ,方法是有效的。The present paper introduces the construction of BGK Boltzmann scheme and the technique to compute the macro values in grid by using finite volume method. The boundary conditions under different Mach numbers of the outflow are described in detail. Four cases of the plane free compressible mixing layer with subsonic subsonic, subsonic supersonic and supersonic supersonic in the up and down layer flow are simulated directly and numerically. The results are presented in detail and compared with other author's results and experimental data. The comparison shows the efficiency of the methods described in the present paper.

关 键 词：BGK格式 平面可压缩自由混合剪切流动 数值模拟 

分 类 号：O357.3[理学—流体力学]