适用于Kappel桨的面元法尾涡模型

摘要

The tip of Kappel propeller curved to the suction side with large tip rake, then the loaded of the blade tip would be increased and the tip vortex would be restrained. In order to obtain the variation of the circulation, it analyzed the circulation distribution of two 3 -D foils through CFD. The foils chosen had a similar geometry with the propeller blade, but one foil had a curved tip like Kappel propeller and the other was straight. Based on the different circulation distribution between the two 3 -D foils, it presented a wake model which can obtain a good result in the calculation of the open water performance with surface panel method. Then the Morino′s Kutta condition and pressure Kutta condition had been discussed.%Kappel桨在梢部剧烈弯折，这样的几何结构能够抑制梢涡的形成，起到梢部加载的作用。为了模拟桨叶弯折后对整个桨叶受力分布的影响，本文通过CFD计算分析几何尺寸相似的弯折三维翼和平直三维翼的剖面环量分布，并以此为基础就面元法分析Kappel桨时的尾涡进行修正。利用修正尾涡模型的面元法计算Kappel桨的敞水性能，与未修改尾涡面的面元法计算结果作比较，并就面元法计算Kappel桨的Morino库塔条件和等压库塔条件进行相关说明。