绕任意轴旋转的矩形截面弯管流动特性  

Characteristics of fluid flow in rotating curved rectangular cross-section duct

作　　者：徐恩生[1] 

机构地区：[1]沈阳航空工业学院基础科学部,辽宁沈阳110034

出　　处：《辽宁工程技术大学学报（自然科学版）》2005年第6期838-840,共3页Journal of Liaoning Technical University (Natural Science)

基　　金：国家十五攻关计划重大项目(2001BA311A03-1)国家自然科学基金资助项目(10372063)辽宁省科学基金资助项目(20011401010)

摘　　要：为了探讨绕任意轴旋转的矩形截面弯管流动规律,利用数值计算的方法研究了绕任意轴旋转的矩形截面弯管内的粘性流动情况,分析了在不同入口距离处离心力和科氏力共同作用下的二次流动、轴向主流的发展变化情况。计算结果表明:对于宽高比λ≤1．0 的矩形截面弯管,在距入口的不同距离上,依次有2涡-4涡-8涡-4涡流动结构的变化,最多有四个速度极值区并且都靠近管道的外侧;大曲率、大Dn数时,F=0轴向速度的极值点靠近管道外侧,F=-1的轴向速度的极值点靠近管道内侧。In order to discuss the rules of fluid flow in rotating curved rectangular cross-section duct, an incompressible viscous steady flow through a rotating curved rectangular cross-section duct is studied numerically with the control volume method .The combined effects of the Coriolis force（due to rotation）and the centrifugal （due to curvature）on the flow structure in different distance from the entrance are examined in detail： for λ ≤ 1.0 ,the number of secondary cell changes 2-4-8-4 in turn with the different distance from the flow entrance; four maximum peed areas come out near the outer of the duct; with large curvature ratio and dean number, for F = 0 ,the maximum axial speed is near the outer of the duct ,while for, F=-1 the maximum axial speed is near inner of the duct.

关 键 词：旋转管道 矩形截面 二次流动 

分 类 号：O357.1[理学—流体力学]