航空学报 > 1994, Vol. 15 Issue (12): 1471-1474

细长体大攻角绕流的数值模拟

李锋, 周伟江, 王强, 汪翼云   

  1. 北京空气动力研究所, 北京, 100074
  • 收稿日期:1993-11-01 修回日期:1994-02-23 出版日期:1994-12-25 发布日期:1994-12-25

ANUMERICAL SIMRLATION OF VISCOUS FLOW OVER A HEMISPHERE CYLINDER

Li Feng, Zhou Weijiang, Wang Qiang, Wang Yiyun   

  1. Beijing Institute of Aerodynamcs, Beijing, 100074
  • Received:1993-11-01 Revised:1994-02-23 Online:1994-12-25 Published:1994-12-25

摘要: 用数值模拟方法研究了细长体大攻角的绕流特性(求解在周向360°范围内进行)。数值模拟的出发方程是三维可压流的全N-S方程,格式为二阶迎风TVD格式。通过数值模拟研究了附近,攻角19°、32.5°和50°状态下,细长体绕流场中的激波、分离流动及表面压力分布等重要特征。

关键词: 细长体, 分离流, 数值分析

Abstract: eparated and vortical flow around a hemisphere cylinder is studied by numerical simulation(computational range includes 360 degrees in the circumferential direction around the body).The implicit TVD(total variation diminishing)algorithm is used to solve the foll Navier-Stokes equations.The numerical simulation is performed at angles of atlack up to 50 de-grees under the transonic flow condition,In analyzing the complicated flow structure,some ex-perimental data and topological concepts or simulated oil flow patterns are used to understand the separation better.

Key words: slender bodies, separated flow, numerical analysis

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