空泡螺旋桨升力面理论设计方法

Design of Cavitating Propellers by Lifting Surface Theory

本文提供了一个局部空泡和超空泡同时存在的空泡螺旋桨或超空泡螺旋桨的升力面理论设计方法。在设计的第一阶段 ,基于由二元超空泡翼型的线性涡分布面元法获得的二元超空泡翼型性能 ,应用娄勃氏诱导因子方法升力线理论初步确定空泡螺旋桨的几何形状 ,如 :桨叶轮廓、剖面形状、径向负荷分布和螺距分布等。然后 ,用局部空泡和超空泡螺旋桨的升力面性能预报方法计算设计桨的空泡几何形状和性能 ,并对设计桨进行修改 ,最后得到考虑了三因次影响后满足设计要求的空泡螺旋桨。

This paper presents a theoretical method for the design of supercavitating propellers or trans-cavitating propellers (a type of hybrid of the supercavitating propeller) by using the lifting surface theory. Based on performances of the two-dimensional supercavitating hydrofoil obtained by linear vortex panel method, the Lerbs' induction factor method of lifting line theory is adopted in the preliminary stage. The geometry of the propeller, such as blade contour, section profiles and circulation and pitch distribution along the radial direction etc., is determined. The final pitch distribution and detailed off-sets of section profiles of the blades are then obtained by lifting surface theory for the cavitating propeller to meet with design requirements.