通气超空泡的形态特性研究

THE INVESTIGATION ON MORPHOLOGY OF VENTILATED SUPERCAVITY

产生满足动力平衡与控制要求的稳定的通气超空泡,是发展高速水下航行体的重要课题.基于N S方程和有限体积法求解气液两相流,采用VOF法捕捉空泡界面,针对二维航行体模型的通气超空泡流动进行了数值模拟,研究了楔形空化器夹角、通气流量及环境压力等物理参数的影响.结果表明,适当的空化器设计、通气流量率和环境压力的参数组合,对于产生满足要求的稳定的超空泡外形是至关重要的.

It is important for developing a high-speed underwater vehicle to attain a steady ventilated cavity meeting with dynamic balance and control requirements. In this paper, based on N-S equations and finite volume method (FVM) the two-phase flow problem was solved. The surface of cavity was tracked by VOF method. For a 2D vehicle model the authors simulated its ventilated supercavity and investigated the influence of some physical parameters such as the included angle of wedged cavitator, ventilation flow-rate and ambient pressure. The results indicate that it is highly important for obtaining a steady morphology of supercavity to adjust these parameters properly.