四桨两舵推进系统的水动力干扰研究

Research on Hydrodynamic Interaction between Four Propellers and Two Rudders

利用较为简捷的扰动速度势的基本积分方程,从解面元法的基本积分方程得到偶极强度,直接求得流场中的速度势分布;为避免在物面上数值求导,用Yanagizawa方法求得物面上的速度分布并通过Bernoulli方程计算桨舵的压力分布,以此计算桨舵的升力系数等宏观量,再通过迭代的方式考虑桨舵的相互影响。通过对某大型舰船的四桨两舵推进系统的水动力所进行的分析研究得到了一些有益的结果。

The hyperbolical quadrilateral panels are employed to avoid gaps between the panels. By solving the governing integral equation with panel surface method, the intensities of doublets can be obtained. Using the doublets and sources the velocity distributions in flow is achieved. In order to avoid numerical derivative, Yanagizawa method is employed to obtain velocity distributions, and pressure distributions of the rudder and propeller are achieved by Bernoulli Equation, with which the lifting coefficients and so on are calculated. Hydrodynamic interaction between rudder and propeller is achieved by an iterative calculation. Some effective and useful results are obtained through the research on the Hydrodynamic interaction of a large ship.