带复杂外形附体的AUV流体动力数值计算

摘要

It is a technical difficulty to calculate the hydrodynamic parameters when autonomous underwater vehicle (AUV) carries some complex shape appendages (equipment) . The general hydrodynamics simulation software CFX and the SST turbulence model were used to calculate the hydrodynamics of AUV with CTD and GPS/Beidou antennas, obtain the AUV hydrodynamic variation of three models and analyze the influence of different appendages on the hydrodynamics of AUV. The results show that the horizontal of AUV with appendages is asymmetric, the pressure and speed change rapidly at the appendages, resulting in the great change of AUV hydrodynamic parameters and the flow field. The numerical results provide a reference frame for the engineering design of AUV.%自主式水下航行器(AUV)携带复杂外形附体(设备)时,其流体动力参数的精确计算是一个技术难点.利用通用流体动力学仿真软件CFX,采用SST湍流模型,对带有盐温深传感器(CTD)和GPS/北斗天线的AUV流体动力进行了数值计算,得到了3种模型下AUV流体动力的变化规律,分析了不同附体对AUV流体动力的影响.结果表明,带有附体后AUV水平面不对称,在附体处压力及速度变化剧烈,导致AUV流体动力参数及流场有了很大的变化.数值计算结果为AUV工程设计提供了参考依据.