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在潜射导弹高速出水之前,弹体的肩部会出现明显的空化现象。为了研究潜射导弹在出水过程中肩部空化的发展演化过程及相应的弹体姿态角变化,以高速摄影为基本手段,采用边缘检测技术测算弹体姿态角以及肩部空化泡边界,通过对比分析不同出水阶段、不同时刻弹体肩部空化发展的状态,用来寻找出水过程中肩部空化现象和弹体姿态的发展规律。研究表明,高速出水条件下弹体在出水过程中有三种形式的空化现象先后出现,弹体肩部一开始形成的是片状空化,其轴向起始位置不同,周向也为随机分布;弹体运动过程中片状空化以两种方式转化为云状空化,一种是先脱落为旋涡型空化,然后再扩散为云状空化;另一种为片状空化尾部直接脱落为云状空化。出水过程中弹体姿态角变化幅度很小,而且在肩部空化泡出水溃灭的瞬间,弹体姿态角并未产生明显变化。
Submarine-launched missiles in the high-speed water before the shoulder, there will be obvious body cavitation cavitation. In order to study the development and evolution of submarine-launched missiles and the corresponding change of projectile attitude angle, the high-speed photography is taken as the basic measure to measure the projectile attitude angle and the shoulder cavitation bubble boundary by using the edge detection technique. Through comparative analysis of different water stages, at different times the development of shoulder cavities cavitation development, to find out the process of water cavitation shoulder and the development of projectile attitude. The results show that three kinds of cavitation occur in the effluent of the projectile during the high-speed water discharge. The cavitation occurs at the beginning of the projectile shoulder, with different starting positions in the axial direction and random directions in the circumferential direction In the process of projectile movement, the sheet cavitation is transformed into cloud cavitation by two ways, one is shedding into vortex cavitation first and then the cloud cavitation again; the other is sheet cavitation Tail off directly into cloud cavitation. During the course of water ejection, the attitude angle of the projectile varied a little, and at the instant when the cavitation bubble of the shoulder collapsed, the attitude angle of the projectile did not change significantly.