双锥头型回转体空化特性实验研究

Experimental investigation of cavitating flows around an axisymmetric body with double-taper headform

该文以双锥头型回转体为研究对象,开展了攻角0°–6°、空化数0.3–1.0范围内共计20个工况的水洞实验,获得了空泡形态和回转体表面压力分布;根据实验观测结果,提出了四种类型的流型划分,研究了各类型空泡流状态下的表面压力特征,给出了不同空化数和攻角下的空泡流流型图;对空泡长度进行了定量判读,分析了小空化数下重力对空泡长度的影响,获得了空泡长度、迎背流面空泡长度差随攻角、空化数的变化规律。

The cavity shape and the surface pressure was measured by high-speed cavitation tunnel experiments with double-taper headform, the range of cavity number was 0.3-1.0 and the range of attack angles was 0°-6°. The experimental results presented four types of flow patterns division and analyzed the characters of the pressure distribution and the cavity flow pattens on different cavitation number and attack angle. The length of partial cavity was given base on the image of the cavity, and the influence of gravity on cavity length had been analyzed. The law of cavity length variation under different cavity number and attack angles was determined.