摘要
本文在势流假定基础上推导了任意边壁形状明渠空蚀突体绕流的基本方程式,并对弓形和半弓形这两种水工中常见的突体绕流进行了数值计算.与实测资料比较表明,计算压力系数值与实测值符合较好,本文方法能计入重力影响,数值计算时只在边界上进行离散处理,有计算时间短,边界适应能力强,计算精度较高等优点.
In this paper,a brief method for computing isolated surface irregularity of arbitrary sharp is given here on the basis of reference.The pressure distribution and minimum pressure coefficients Cp_(min)for different heights of the irregularity △ and radii of the circular arc R are computed,from which the incipient cavitation number can be estimated.Numberical calculation shows that the numberical resulats here agree well with those measured.
关键词
明渠
空蚀突体
突体绕流
压力系数
boundary integral equation
isolated surface irregularity
incipient cavitation number
pressure coefficient
