为实现对泵喷推进航行体有动力流场的数值模拟,基于多参考系模型(MRF)建立了有动力流场模型;利用Fluent软件求解以k-εRNG湍流模型封闭的RANS方程实现流场的数值仿真;在用试验数据对仿真结果验证基础上,分析了泵喷推进器对航行体水动力参数的影响规律,结果表明文中所研究的泵喷推进器使航行体在10m/s航速下的阻力系数增大约47%,对垂向力系数和俯仰力矩系数影响小于3%。所建立的数值仿真方法及结果可为航行体水动力特性研究提供重要参考。

The flow field model of underwater vehicle with pump jet propulsion was established based on multiple reference frame (MRF). RANS equations with k-εRNG turbulent model were solved by FLUENT software to simulate the flow field. Validity of the CFD model was verified using data from experiment. Through analyzing the flow field, it is found that drag coefficient at 10m/s increases by 47 percent under the influence of pump jet propulsion. Lift coefficient and pitch moment coefficient change less than 3%. The simulation method and CFD results could provide an important reference for later research on hydrodynamic characteristics of underwater vehicle with pump jet propulsion.