计算物理 ›› 1993, Vol. 10 ›› Issue (4): 422-428.

• 论文 • 上一篇    下一篇

弹体尾部轴对称干扰流场数值模拟

周伟江, 马汉东   

  1. 北京空气动力研究所, 北京 100074
  • 收稿日期:1992-04-14 修回日期:1992-12-21 出版日期:1993-12-25 发布日期:1993-12-25
  • 基金资助:
    国家青年自然科学基金

NUMERICAL STUDY OF THE AXISYMMETRIC FLOW OVER A MISSILE AFTERBODY

Zhou Weijiang, Ma Handong   

  1. Beijing Institute of Aerodynamics, Beijing 100074
  • Received:1992-04-14 Revised:1992-12-21 Online:1993-12-25 Published:1993-12-25

摘要: 绕弹体的超声速气流与发动机喷流相互作用,在尾部形成复杂的干扰流场。本文用有限差分法求解全N-S方程,对这一复杂流场进行了数值模拟,得到了实验观察到的各种流场结构及其随喷口压力比的变化规律。外流M=1.94,Re=2.2×105,喷流Mj=3.0,喷口压力比pj/p分别为1.03,0.527,0.15三种。差分算法为一种改进的Beam-Warming格式。计算底部压力和激波在喷流中心的反射位置与实验数据进行了比较,吻合较好。

关键词: 喷流, 尾迹流动, 数值模拟

Abstract: The interaction between supersonic external flow and an exhaust jet forms a complex flowfield region near the missile afterbody. In this paper, the research about this interaction flows was completed with finite-difference method to solve N-S equations. The flowfield structures observed in experiment and it's relation with jet pressure ratio pj/p were obtained. For freestream, M=1.94, Re=2.2×105, for jet flow, Mj=3.0, three pj/p(1.03, 0.527 and 0.15) were selected. The numerical algorithm used is a modified Beam-Warming scheme. The nozzle base pressure coeficient and shock reflection length were compared with experimental data, good agreements were reached.

Key words: jet flow, wake flow, numerical simulation