Abstract: The internal and external flow fields of SCFN 2 D nozzle was numerical simulated In order to capture the shockwaves effectively and simulate the separated flow fields better, Roe scheme and MUSCL approach,Venkatakrishnan limiter,Spalart Allmaras one equation turbulence model were used Some numerical results for four states of two SCFN models were presented It shows that very good computational results have been gotten with this arithmetic except the flow fields including serious separated domain

Key words: Unconventional nozzle;Nozzle flow;Numerical simulation;Navier-Stokes equation

摘要： 研究了球面收敛矩形扩张的二元喷管 (SCFN)流场的数值模拟 ,为了有效地捕获激波与滑流面及较好地模拟分离 ,采用了 Roe格式、 MUSCL方法及 Venkatakrishnan限制器、 Spalart- Allmaras方程紊流模型。研究中给出了两个喷管模型四个流动状态的数值模拟结果。结果表明 ,除了有严重分离的流动情况以外 ,该算法能得到相当满意的计算结果

关键词: 特型喷管;喷管气流;数值模拟;纳维尔-斯托克斯方程