仿生翼水下航行器直航运动时水动力性能分析

Hydrodynamic Performance Analysis of Underwater Vehicle with Bionic Tail during Straight Ahead Motion

在仿生翼水下航行器设计阶段,针对如何在主尺度和巡航速度确定的前提下得到直航阻力最小的尾翼形状这一问题,对仿生翼水下航行器直航运动时的水动力性能进行了分析。仿生翼水下航行器主体采用回转体结构,中段为平行结构,艏艉部为Myring型。采用三维结构化网格形式,基于五种湍流模型,对仿生翼水下航行器进行仿真,得到不同航速下仿生翼水下航行器直航阻力与表面流场的变化规律,并与平板翼进行对比。通过分析验证了仿生翼水下航行器相比平板翼水下航行器,具有更优的水动力性能,为水下航行器设计阶段的阻力性能预测和尾翼优化提供了参考。

In the design stage of the underwater vehicle with bionic tail,the hydrodynamic performance during the straight ahead motion of the underwater vehicle with bionic tail was analyzed aiming at the issue of how to obtain the shape of the tail with the least direct drag under the precondition of defined principal dimension and cruising speed.The main body of the underwater vehicle with bionic tail adopts a revolving structure,the middle section is a parallel structure,and the bow and stern section is of a Myring type.The underwater vehicle with bionic tail adopts a 3D structured grid form and five turbulence models for simulation to obtain the variation laws of the direct drag resistance and surface flow field of the underwater vehicle with bionic tail at different speeds and carry out comparison with the underwater vehicle with flat tail.The analysis verifies that the underwater vehicle with bionic tail has better hydrodynamic performance than the underwater vehicle with flat tail.It provides a reference for the prediction of the drag performance and the optimization of the tail for the underwater vehicle during the design stage.