船尾整流鳍绕流的数值计算

Numerical Calculation of Flow around Ship Stern Hydrodynamic Fin

本文采用通量差分分裂型上风差分格式（FDSU）求解不可压缩三维RANS方程，忽略自由面影响，用孔点法对HSVA船后体加装平板整流鳍进行了绕流计算，避免了流场中由于鳍的存在而引起的坐标线的分叉、多值等网格奇异现象。本文考虑了整流鳍的尺寸、攻角和垂向安装位置对流场的影响，此工作为整流鳍的优化设计提供了有意义的信息，也为探索船尾水动力节能装置的节能机理提供了基础。

The effect of free surface being neglected, a computation of the flow around a hydrodynamic fin(HF),which is installed on the stem of HSVA tanker model, by solving the incompressible RANS equations using the method of flux - difference splitting upwind differential scheme is presented in this paper. To avoid the bifuration and multiple values of coordinate lines caused by the existence of HF in the flow field, a method of 'hole points' is introduced. The influence of HF on the flow field, with the variation of its size, attack angle and vertical position, is discussed. It will provide useful information for the optimum design of HF, and it also lays a good foundation for the further investigations on the mechanism of stem hyedynamic energy - saving devices.