A Study on Wake Geometry behind Marine Proellers

1.基于定常解的面元法和三维矩形翼几何尾迹模拟程序，编制了螺旋桨尾流几何计算应用程序。应用该方法对无侧斜常规螺旋桨进行了计算，取得了较好的结果。由于计算中没有考虑粘性效应，计算结果表明，在常规螺旋桨的数值模拟中，不考虑粘性效应也能得到较好的结果.虽然通过实验尝试了基于商业CFD软件的计算，以建立雷诺数与尾流几何形状之间的关系，但发现结果取决于网格生成。这将是伟大的未来工作。3.提出了大斜交船用螺旋桨的应用。结果表明，在没有粘性效应的情况下，尾流的几何形状是发散的，而在有粘性效应的情况下，尾流的几何形状是发散的.使用基于非常便宜的PC的评分系统是非常有用的，并且具有良好的性价比。

1. An application program for wake geometry behind propeller was developed.The program was based on both a panel method in steady solution and simulation program of geometrical wake solution for 3-dimensional rectangular wing. By the method, good results' were obtained in case of skewless conventional marine propellers. As in the calculation viscous effect was not considered, it was shown that in the conventional propeller's simulations, good solutions can he obtained without the effect.2. Although calculations by the commercial based CFD software were tried for making a relation between Reynolds number and wake geometry by experiment, it was found that the results depend on grid generation. This will be great future works.3. The applications for large skew marine propellers were submitted. As a results, in case without the viscous effect the geometry of wake is diverged and in case with the effect the result is not achieved.4. The use of a Score system based on very cheap PCs is very useful and a good cost performance.