中文摘要：

为了控制整装式液体发射药火炮燃烧稳定性,针对稳燃渐扩型药室结构,利用高速摄影方法,观察了气体射流在液体中的扩展过程,测量了射流轴向扩展速率。在实验基础上,从湍浮力射流理论出发,建立了气体射流在液体中扩展的准稳态模型。借助四阶龙格-库塔法,编程模拟出气体射流的扩展特性。结果表明：随着轴向距离增加,射流中心线速率迅速递减,射流半宽度呈线性递增,计算值与实测值吻合较好。

英文摘要：

In order to control the combustion stability of bulk loaded liquid propellant gun, aimed at the charmber structure of extended facility, by means of high speed photographic method, the expansion process of gas jet in liquid working medium was observed, and the expansive velocity of gas jet was measured. Based on the experiment and the theory of turbulent buoyancy jet, the quasi-steady model of gas jet expansion process in liquid working medium was established. The expansive characteristics of gas jet were programmed and simulated by use of Rung-Kutta method. The solved results showed that the center line velocity of gas jet was decreased rapidly and the half-width of gas jet was increased linearly with the increase of distance in axial direction. The solved results were approximately coincident with the experimen- tal results.