围壳对水下航行体水动力系数的影响特性研究

Numerical study on effect of sail on hydro-coefficient of the underwater vehicle

作为水下航行体的重要附体之一,围壳对其操纵性水动力系数存在重要影响。为此基于相对参考坐标系方法,开展旋臂水池数值仿真研究。通过与模型试验数据对比,建立了线性旋转速度系数的数值计算方法。在此基础上研究有无围壳状态、围壳在水下航行体上的轴向位置工况下水下航行体的水动力系数和流场特性,得到了围壳对水下航行体流场和水动力系数的影响。

As one of the important appendages of underwater vehicle, the sail has significant influence on the maneuvering hydrodynamic coefficient. Based on the moving reference frame method, rotating arm simulation is conducted and a numerical method for linear rotating velocity coefficient prediction is suggested, by comparing with experimental data. The maneuvering hydrodynamic coefficient and flow filed of the underwater vehicle model with or without sail or the sail under different axial installation location are analyzed in detail. By the comparison and analysis of the results, the influence of sail on maneuvering hydrodynamic coefficient and flow filed is clarified.