圆锥形谐振管的谐振性能研究

Investigation of Resonance Characteristics of Conical Resonance Tube

在液体火箭发动机气动谐振点火技术中,圆锥形谐振管因气体谐振加热温度高、加热速度快而受到重视。文中利用Whitham规则,从理论上分析了在圆锥形管中振荡气体的压强和温度特性。因为圆锥形谐振管对激波有增强作用,所以在相同条件下,圆锥形谐振管中气体压强的振荡幅度和加热温度、速度都要高于圆柱形谐振管,因而圆锥形谐振管加热性能比圆柱形谐振管好。

Because the gas at the end of a conical resonance tube can be heated to a higher temperature more quickly than at the end of a cylindrical resonance tube,researchers pay more attention to the conical resonance tube in the engineering field of the gasdynamic resonance ignition technique of liquid propellant rocket engine.By using Whitham rule,this paper analyzes the characteristics of pressure and temperature of the oscillating gas in the conical resonance tube theoretically and explains why the conical resonance tube can reach higher temperatures than the cylindrical resonance tube.Because the conical resonance tube can enhance shock waves,the gas at the end of the conical resonance tube has higher pressure oscillation amplitudes and higher temperatures and heating rates than that at the end of the cylindrical resonance tube.