自主水下航行器回收过程中螺旋桨推力特性分析

摘要

在自主水下航行器(AUV)水下回收过程中,螺旋桨的推力特性对AUV的稳定性控制及安全性能等影响非常明显.主要基于计算流体力学方法,采用多块混合网格技术结合RNG k-ε湍流模型,对AUV在不同回收工况下的螺旋桨推力特性展开数值模拟.建立AUV及螺旋桨的三维几何模型;基于多块混合网格方法对计算域进行空间离散,同时采用动网格技术实现螺旋桨与回收管的相对运动及自身旋转运动;利用有限体积法展开数值计算.基于计算数据与试验数据的对比及数值无关性测试,表明所使用的多块混合网格方法能够对AUV回收过程螺旋桨推力特性进行准确计算,为AUV水下回收过程的控制及安全性能评估能够提供理论参考.%The influence of propeller thrust performance on the stability control and safety performance of autonomous underwater vehicle (AUV) during the process of AUV recovery is very obvious.Based on CFD method,the multi-block meshes method combined with RNG k-ε turbulent model is used for the simulation of propeller thrust performance of AUV in different recovery cases.The three-dimensional geometric models of AUV and propeller are built.The calculation domain is dispersed by multi-blocks meshes,and the dynamic mesh technique is used to simulate the motion of AUV and propeller.The numerical simulations are performed based on the finite volume method.The comparison of numerical and experimental results,as well as numerical independence test show that the proposed numerical method can be used to calculate the propeller thrust performance during the process of AUV underwater recovery accurately,and the numerical results can provide theoretical reference to the stability control and safety performance of underwater AUV recovery.