超空泡航行体外形设计及航程分析

Shape Design and Voyage Analysis on Supercavitating Vehicles

航行体形状及长细比等参数对超空泡航行体的阻力特性及运动稳定性有着直接的影响,并最终决定航程大小.基于Fluent6.2中的空泡模型对一定速度范围内的超空泡航行体的两相流流场进行了数值模拟,比较了4种不同外形的超空泡形态及阻力特性,并对其航程进行了分析,为给定初速下航程最大的超空泡航行体外形设计提供了理论依据.

The shape and some geometrical parameters of underwater vehicle, such as the ratio of length to diameter, have direct effects on drag characteristics and motion stability of supercavitating vehicle. The final voyage of vehicle also depends on these factors. Based on cavitation model in Fluent 6.2, numerical simulation on two-phase flow around supercavitating vehicles within limits of velocity was carried out. Supercavity morphology and drag characteristics of four varying shaped vehicles were researched, and their voyages were analyzed. The results can provide some theoretical foundations for shape design of supercavitating vehicles with farthest voyage on certain initial velocity condition.