管道中圆化突体绕流边界拟合坐标数值解法  

Numerical Solution for Flows around Surface Irregularities With Rounded Corners in a Pressure Conduit

作　　者：马怀发 李国庆[2] 

机构地区：[1]北京研究生部 [2]华北水利水电学院水利系

出　　处：《华北水利水电学院学报》1996年第3期5-9,28,共6页North China Institute of Water Conservancy and Hydroelectric Power

摘　　要：本文利用边界拟合坐标变换计算管道边壁突体绕流的速度和压力分布。文中给出了流函数方程及边界条件的坐标转换形式和离散格式，采用了强隐式（ＳＩＰ）迭代法，分别对具有弓形和半弓形突体的直管进行了计算。与文献［１］中的试验和有限元计算结果对比。A general review is given on the numerical method of computing the velocity and pressure distribution along surface irregularities with rounded corners in a pressure conduit by finite difference method,based on boundary-fitted curvilinear coordinate (BFCC) systems.In this paper,the transformed forms of the flow function equation and boundary conditions and their difference expressions are given,and Strongly Implicit Procedure (SIP) iteration is used .The computed results of the examples are in excellent agreement with the experimental values and more accurate than those by using finite element method in Reference.

关 键 词：圆化突体 边界拟合坐标 强隐式 水力计算 直管 

分 类 号：TV134[水利工程—水力学及河流动力学] TV131.4