考虑平衡气体效应的斜爆轰波驻定窗口的研究

为研究真实情形下斜劈诱导的斜爆轰波的驻定窗口及影响因素,利用考虑平衡气体效应的极曲线关系式,分析了氢气-空气混合物的斜爆轰波的驻定窗口。与已有的一步反应的驻定窗口对比,讨论了平衡气体效应带来的特性; 调整来流混合物的马赫数、压力、温度和当量比,分析了不同参数对驻定窗口的影响。研究结果表明,在氢气-空气混合物中采用9种平衡气体组分时,随着来流马赫数和温度的增加、混合物当量比的减少,形成的驻定窗口明显增加,斜爆轰波更容易驻定; 初压对斜爆轰波的驻定影响较小。

Analysis of Standing Window of Oblique Detonation Wave Considering Equilibrium Gas Effect

To study the standing window and influence factors of wedge-induced oblique detonation wave in real working condition,the polar curve considering equilibrium gas effect was used to analyse the standing window of the oblique detonation wave of the hydrogen-air mixture,which was compared with the standing window of the hydrogen-air mixture for one step reaction. The influence of several incoming flow parameters,such as Mach number,pressure,temperature and equivalent ratio,on the standing window was analysed. The result shows that the equilibrium compositions for hydrogen-air mixture include 9 species. With the increase of Mach number and temperature and the decrease of equivalent ratio,the standing window of oblique detonation wave considering equilibrium gas effect increases obviously,and the oblique detonation wave is easier to stand. The influence of dynamic pressure on the standing of detonation wave is little.