闭口管内气体非线性振荡研究

推进技术 ›› 2000, Vol. 21 ›› Issue (4): 32-35.

闭口管内气体非线性振荡研究

刘君,郭正,瞿章华

国防科技大学航天与材料工程学院!湖南长沙410073;国防科技大学航天与材料工程学院!湖南长沙410073;国防科技大学航天与材料工程学院!湖南长沙410073

发布日期:2021-08-15

Numerical simulation of nonlinear gas oscillations in closed pipe

Inst.of Aerospace and Material Engineering,National Univ.of Defence Technology,Changsha 410073,China;Inst.of Aerospace and Material Engineering,National Univ.of Defence Technology,Changsha 410073,China;Inst.of Aerospace and Material Engineering,National Univ.of Defence Technology,Changsha 410073,China

Published:2021-08-15

摘要/Abstract

摘要： 采用新型的计算效率较高的ENO差分格式 ,从一维非定常Euler方程出发 ,对受扰动气体在闭口管内的传播现象进行了数值模拟。计算发现小扰动情况下 ,当激振频率接近管内气体的固有频率时会发生非线性振荡 ,有激波产生 ;但当扰动较大时 ,激振频率的影响变得不明显。

关键词: 固体推进剂火箭发动机;推进剂燃烧;振荡燃烧;激波;扰动

Abstract: The phenomenon of oscillating gas in a closed pipe was simulated numerically based on one-dimensional Euler equatio using a new ENO scheme It was indicated that the slight disturbance might induce nonlinear oscillations with shock waves when the stimulating frequency was approximate to the intrinsic frequency of the pipe But when the disturbance was strong, the frequency became unimportant

Key words: Solid propellant rocket engine;Propellant combustion;Vibrational combustion;Shock wave;Disturbance

刘君,郭正,瞿章华. 闭口管内气体非线性振荡研究[J]. 推进技术, 2000, 21(4): 32-35.