两相爆轰波的松弛结构

THE RELAXATION STRUCTURE OF TWO-PHASE DETONATIONS

两相爆轰波的松弛结构明显区别于均相爆轰,除需考虑化学反应的影响外还需考虑两相流效应。本文的理论分析表明,化学反应效应和两相流效应对爆轰波松弛区内某些参数变化的影响是一对矛盾因素,这使得松弛区内的参数分布呈较为复杂的形态,均相爆轰中这类分布曲线往往是单调变化的。根据作者提出的云雾和粉尘爆轰模型所进行的计算表明理论分析与计算结果所呈现的态势一致。 文中还讨论了两相爆轰波的C-J条件,Rayleigh方程和Hugoniot方程,并根据计算绘制了Rayleigh曲线和Hugoniot曲线,这从另一侧面反映了两相爆轰波松弛结构的特征。

The relaxation structure of two-phase detonations, as distinguished from homogeneous one obviousely, depends on not only the effect of chemical reaction but also the effect of two-phase flow. It has been shown from the theoretical analysis that the influences of two kinds of factors on the flow parameters in the relaxation zone are sometimes contradictory. It makes the profiles of flow variables quite complicated, which are no longer monotonic as those in homogeneous one. The tendencies of profiles obtained from the calculation results based on the models of spray and dust detonation proposed by authors are in good agreement with the prediction of the theoretical analysis.Chapman-Jouguet condition and the extended Rayleigh and Hugoniot equations for two-phase detonations are also discussed and the Rayleigh and Hugoniot curves are plotted by using the calculated results to show the main features of the relaxation structure of the two-phase detonations further.