帆船帆翼空气动力性能数值模拟中计算区域处理方式研究

Study on the Computation Domain of Numerical Simulation on the Aerodynamic Performance of the Sails

为了讨论计算区域的离散对帆船帆翼空气动力性能数值结果的影响,对6种不同网格区域和网格处理类型时的数值模拟结果以及试验结果进行了比较。通过研究分析,综合计算精度、建模时间和计算耗费时间等方面因素,在进行帆船帆翼空气动力性能数值模拟中,确定了计算区域为前面6倍、左右6倍、上面6倍、后面10倍帆翼底边弦长及帆翼底部为实际距离海平面的距离,同时采用混合网格进行网格划分,能够得到比较节省计算时间、精度较高的模拟结果。

In order to get the effects of the discretization of the computation domainon the numerical simulation,in this paper the numerical simulations of six different computation domains are performed and the results of which are compared with trial results.by analyzing,taking into account of the computational precision targets,the time for building the model and the computing time and so on,the computation domain should be six times of the chord of the sail bottom on the ahead,left,right and up direction,the actual distance on the down direction and ten times of the chord of the sail bottom on the back In the numerical simulation of the aerodynamic performance of the sails and the grid should be mixed by the uniform and non-uniform meshes,which can save computing time and be beneficial to obtaining more efficient simulation results.