超空泡发展过程研究以及对两种研究滑行力方法的评估

采用两流体模型以及DES湍流模型对通气超空泡发展过程以及泡内压力变化规律进行了三维数值仿真。模拟了两种泄气方式:回注射流和双涡管泄气方式。并基于文中数值方法预测通气超空泡方面的能力,对两种研究航行体滑行状态的方法进行了评估:一种方法是在水槽中的定轴俯仰运动,另一种方法是类似于约束模实验的自由俯仰运动,两种方法都采用了网格变形技术。结果表明在相同条件下,后者可以很容易得到超空泡航行体的滑行状态而前者较难获取滑行状态,尽管在水槽中前者更易实现。文中的数值方法可以用来进一步研究滑行状态并给出一些有意义的结论。

Numerical Simulation on the Process of Supercavity Development and the Planing State of Supercavitating Vehicle

In order to understand the evolution rule of the inner pressure of ventilated supercavity in its developing process as well as the cavity stability,unsteady three dimensional numerical simulations adopting the two-fluid muhiphase flow model and DES(Detached Eddy Simulation Model)turbulence model are carried out.One method based on the relative motion and mesh deformation technology is adopted to investigate the planing state of supercavitating vehicle.The results show the method can predict the developing process of supercavity and its instability characteristic as well aS the planing state of supercavitafing vehicles.The numerical method can be used to further investigate the planing state and give some significant conclusions.