仿生叶剖面厚度分布对螺旋桨水动力性能影响的数值分析

Numerical Research on Influence of Bionic Blade Section Thickness Distribution on Hydrodynamic Performance of Propellers

为进一步分析船舶螺旋桨几何特征的变化对水动力性能的影响,通过参数化的仿生设计方法改变叶剖面的厚度分布并采用SST k-ω湍流模型及Schnerr-Sauer空化模型对具有不同叶剖面形状的仿生船舶螺旋桨进行敞水特性和空化形貌的数值模拟。计算结果表明,合理设计仿生叶剖面的厚度分布可以在一定程度上提高不同进速下的效率和减少桨叶表面的空化面积,但随着仿生叶剖面的最厚点逐渐靠近导边,桨叶表面的空化发展也会提前发生。

In order to further analyze the impact of changes in geometric characteristics of marine propellers upon the hydrodynamic performance,the thickness distribution of blade sections was changed by a parameterized bionic design method and the SST k-ω turbulent model coupled with Schnerr-Sauer cavitation model were used to simulate the open water characteristics and cavitation morphology of bionic marine propellers with different blade sections.The results showed that the reasonable design of the thickness distribution of bionic blade sections can improve the efficiency at different advance speeds and reduce the cavitation area on the blade surface to a certain extent;however,as the thickest point of the bionic blade section gradually approaches the leading edge,the cavitation development on the blade surface will also occur in advance.