零攻角和小攻角下带空泡轴对称细长体的水动力计算

本文利用数值计算手段研究零攻角和小攻角下轴对称细长体的肩空泡形态，压力分布和水动力等特性。潜体绕流问题的求解是利用物面布置奇点的有限基本解方法，发展一种有效的迭代方法－自适应改进型牛顿迭代法求解空泡自由表面的形状，这种迭代法本文选用的空泡尾流模型，收敛性很好。

A Numerical Study on Hydrodynamic Forces and Moment on Cavitating Slender Axisymmetric Bodies at Small Angles of Attack

The developed cavity shape and the hydrodynamics characteristics on cavitating axisymmetric bodies at both zero and small angles of attack are calculated by a numerical method.these cavities originate from the shoulder of the slender body.The boundary element method is used to solve the potential flow problem, and a new iteration method named Adaptive Modified Newton iteration is developed to determine the cavity shape.A cavity closure model that relates to the point of detachment,the separating angle and the terminal length of cavity is described.In order to speed up the calculation,a new approximate method is developed.