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为了研究凹面腔构型对环形射流聚心碰撞产生激波会聚起爆爆震的影响及作用规律,本文以氢气和空气混合物为例,对不同尺寸和曲率的凹面腔内激波会聚起爆爆震过程进行了数值模拟,结果表明,在凹面腔尺寸的选择上,要同时考虑射流强度和凹面腔空间对入射激波造成的衰减作用,平衡两者,从而选择出合适的凹面腔。凹面腔曲率既不能太大,也不能太小。本文算例中,直径为74mm,开口直径为70mm的部分球形凹面腔起爆性能最优。
In order to study the influence of the concave cavity configuration on the detonation of a convergent detonation of a toroidal jet with a centripetal collision and the law of action, this paper takes a mixture of hydrogen and air as an example to study the detonation process of shock waves in a concave cavity with different sizes and curvatures. The numerical simulation results show that, in choosing the size of the concave cavity, both the jet intensity and the attenuation effect caused by the concave cavity space on the incident shock wave should be taken into account, and both should be balanced so as to select a suitable concave cavity. The curvature of the concave cavity can neither be too large nor too small. In this case, the partial spherical concave cavity with a diameter of 74mm and an opening diameter of 70mm has the best initiation performance.