高速水下航行体超空化通气参数数值研究

Numerical Research on the Ventilation Parameters of Underwater Supercavitating High Speed Vehicle

超空化技术是水下航行体减阻增速的一种重要方式。通过求解N-S方程,利用两方程湍流模型和全空化模型对通气空化流场进行了数值模拟,研究了通气参数对空化流场结构的影响,揭示了通气超空化减阻机理和场内流动状况,分析了超空化航行体阻力特性,数值结果表明供气量是决定空泡形态和超空化航行体减阻效果的最关键因素,供气位置和方向对空泡形态及水动力特性的影响并不显著。

The supercavitating technology provides a means of significantly reducing the drag of underwater vehicles. The ventilated supercavitating flow was researched numerically based on N - S equations by use of conventional turbulence model （e. g. k-ε model） and full cavitation＇ model. The effect of ventilation parameters on cavity flow structure of slender axisymmetric body was analyzed. The main parameter that influence on supercavitation characteristic was pointed out. The characteristic and the principles of drag reduction are explained. The results indicate that the quantity influence more significantly rather than the location and direction of gas-supply into cavity on the shape, hydrodynamics characteristic and effect of drag reduction.