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

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