高速航行体通气空泡形态

Investigation of Ventilated Cavity Shapes of a High Speed Underwater Vehicle

采用数值模拟方法,对高速航行体垂直发射上升过程重力场中的通气空泡流进行了研究.基于Mixture多相流模型和耦合自然空化模型,建立气、汽、液多相空泡流数学模型,求解整个流场域内的Reynolds平均Navier-Stokes方程.使用动网格技术(Dynamic Mesh Method)结合用户自定义函数(UDF)的程序,数值模拟了重力影响下高速航行体垂直发射水下运动过程,揭示了通气空泡的演化规律及流动载荷变化特征.

The ventilated cavitating flow in a longitudinal gravity force field was studied by using numerical simulation method during vertical launch submarine missile rising.Based on the Mixture multiphase model and coupled with the natural cavitation model,the Reynolds-averaged Navier-Stokes equations were solved and the mathematical model of multiphase cavitating flow of gas,vapor and water was established.A dynamic mesh technique was utilized,combined with UDF program,the underwater motion process of a submarine vertically launched missile was simulated,and the evolution of the ventilated cavity and the effect of the partial cavity on the hydrodynamics were achieved.