摘要
数值模拟了三维粘性半球柱喷流流场，数值格式为Ｊａｍｅｓｏｎ的显式中心有限体积方法．针对喷流下游出流边界出现的亚音速外部绕流与超音速喷流的相互作用的问题，重点对比研究４种下游出流边界条件的处理方法：①Ｒｉｅｍａｎｎ不变量关系法；②内点外差法；③依边界当地Ｍａ数，亚音速时采用Ｒｉｅｍａｎｎ不变量关系法，超音速时采用内点外差法；④特征变量法．
A viscous jet flow from a hemisphere cylinder has been computed by numerical solution of three dimensional compressible N S equations using Jameson's finite volume method. The main purpose of this paper is to compare the effectiveness of treatment methods for mixed (subsonic freestream/supersonic jet flow) outflow boundary conditions,including: ①Riemann invariant method; ②extrapolation from the interiors; ③using the method 1 or 2 depending on the local Mach number; ④characteristic theory method.
出处
《北京航空航天大学学报》
EI
CAS
CSCD
北大核心
1997年第3期346-350,共5页
Journal of Beijing University of Aeronautics and Astronautics
