摘要
本文基于任意正交曲线坐标系下的流体流动基本方程的一般表达式,针对内流流体力学数值分析中经常遇到的具有任意曲率S弯管情况,通过几何分析,建立了适用于矩形、圆形及椭圆形变曲率S弯管道的曲线坐标系,进而导出相应坐标系下的三维可压流体流动的基本方程。
In this paper , orthogonal curvilinear coordinate systems for arbitrarily bent ducts are established and the Lamei coefficients are obtained by using the general geometrical analysis for special bent ducts .Then ,the basic equations of fluid flow in the special orthogonal curvilinear coordinate systems are derived from the general forms of the equations in an orthogonal curvilinear coordinate system . Several special features of the equations are discussed.
关键词
流体流动
弯曲管道
流体运动方程
fluid flow,bend pipes,fluid motion equations ,currivlinear coordinates
