Developemtn of a New Method for Control and %discharge o High Pressure Exhaust Gas by Means of Shock Wave Confinemnt

1.本文提出了一种利用管道中阻塞波约束测量高压废气排放的方法。与排气管相连的管道具有入口和出口孔，使得流动在这些部分处被阻塞。为了分析的目的，在管道中的流动被假定为摩擦和绝热流与正激波。计算结果表明，总压降随进气口开口面积的减小而增大，而减小排气口开口面积可以实现激波在通道中的约束.一种用于限制高压排气膨胀产生的冲击波的装置已在管道上的宽压力范围内建造和试验。激波在管道中的位置与计算结果吻合较好。另一方面，由于激波成为一种预激波，通道内的总压损失比计算值大得多。上述理论和实验结果表明了该方法的有效性，对高压气体的控制和排放具有一定的实用价值。获得了冲击波约束的实验数据。

1. A discharging method of high pressure exhaust gas by measn of a chock wave confinement in a duct been developed. The duct, which is conneted to an exhaust gas pipe, has inlet and exit orifices so that the flow is foubly chokes at these sections.2. For analytical purposes, the flow in the duct is assumed to be a frictional and adiabatic flow with a normal shock wave. The calculated results show that the total pressure reduction increases with a decreasing opening area of the inlet orifice, and the shock wave confinement in the duct can be achieved by cesreasing the opening area of the exit orifice.3. An apparatus for confinement of a shock wave, whick is generated by an expansion of hihg pressure exhaust ga, has benn constructred and tested over a wide range of pressure tations across the duct. The location of the shock wave in the duct agrees well with the calculated results. On the ogher hand, the trotal pressure loss actoss the duct is much larger than the calculated values, becouse the schok becomes a presudo-shock.4. The theoretical and experimantal results mentioned above indicate the validity of the present discharging method, and the present method is quite useful for controlling and discharaging og high pressure exhause ga. The data for shock wave confinement have been obrained.