火箭喷管内三维非对称流场的数值模拟研究

推进技术 ›› 1997, Vol. 18 ›› Issue (2): 6-10.

火箭喷管内三维非对称流场的数值模拟研究

武晓松,王政时,季宗德

南京理工大学机械学院!南京;210094;南京理工大学机械学院!南京;210094;南京理工大学机械学院!南京;210094

发布日期:2021-08-15

NUMERICAL SIMULATION OF THREE-DIMENSIONAL NON-SYMMETRICAL FLOW IN ROCKET NOZZLES

School of Mechanics, Nanjing Univ. of Science and Technology, Nanjing, 210094;School of Mechanics, Nanjing Univ. of Science and Technology, Nanjing, 210094;School of Mechanics, Nanjing Univ. of Science and Technology, Nanjing, 210094

Published:2021-08-15

摘要/Abstract

摘要： 利用特征线方法数值模拟了双圆弧和抛物线两种特型喷管中的三维非对称定常等熵的超音速流场。计算出的喷管侧向力数据与实验结果吻合。沿喷管轴线方向，侧向力曲线具有明显的摆动特性，且在轴线上存在着零点。计算表明，抛物线喷管的侧向力曲线滞后于双圆弧喷管，并具有不同的摆动波长，说明型面是影响侧向力摆动特性的重要因素。

关键词: 火箭发动机喷管;特型喷管;流动分布;特征线法;数值模拟

Abstract: Numerical simulation of three-dimensional, steady, isentropic, non-symmetrical flow in rocket nozzles is completed using a bicharacteristic method. Side forces of two nozzles are obtained,the nozzle contours are double-cicular and parabolic respectively with same rate of expansion. The oscillatory nature of the side forces is evident, and zero points at which the magnitude of the side force is zero exist along the axis of nozzle. The analysis shows that the side force of the double-circular nozzle oscillates more rapidly and has a shorter distance between two zero Points than that of the parabolic nozzle.

Key words: Rocket engine nozzle;Unconventional nozzle;Flow distribution;Method of characteristic curve;Numerical simulation

武晓松,王政时,季宗德. 火箭喷管内三维非对称流场的数值模拟研究[J]. 推进技术, 1997, 18(2): 6-10.