爆轰驱动激波管缝合激波马赫数计算

采用数值求解的方法得出了氢氧爆轰驱动激波管的缝合状态参数.以空气为试验气体时,缝合激波马赫数随着H2摩尔浓度的增加而增加,H2摩尔浓度达到90%左右时达到最大.当缝合马赫数较高时,需要考虑高温真实气体效应的影响,缝合激波马赫数较理想气体的高.以氢空气混合气为试验气体时,缝合激波马赫数较以空气为试验气体的小.通过调整驱动气体与被驱动气体的初始参数,可以得到即能恰好消除Taylor波又能缝合的运行状态.

Numerical computation on the tailored shock Mach numbers for a hydrogen-oxygen detonation shock tube

The numerical solution of tailored state parameters was obtained for a shock tube driven by hydrogen-oxygen detonation.Using air as testing gas,the tailored shock Mach numbers increased with the increase of the concentration of hydrogen and it reached maximum when the molar concentration of hydrogen was 90%.In the case of the high tailored shock Mach numbers,the real gas effects should be taken into account and the numbers were higher than that in the ideal gas case.Value of the tailored shock Mach numbers using air-hydrogen as testing gas was smaller than that using air as testing gas.By adjusting the initial parameters of driver-driven gas,the condition that the contact surface is tailored and Taylor wave is just eliminated can be achieved.