挠率对螺旋管道内二次流的二阶效应  

THE SECOND ORDER EFFECTS OF THE TORSION ON THE SECONDARY FLOW IN A HELICAL PIPE

作　　者：谢定国[1] 

机构地区：[1]浙江大学力学系

出　　处：《力学学报》1990年第5期610-618,共9页Chinese Journal of Theoretical and Applied Mechanics

摘　　要：本文用螺旋坐标系和摄动法研究了在螺旋管道内的低雷诺数(R<17/(8^(1/2)))不可压缩流体的定常粘性流动,给出了完全的二阶摄动解。结果表明管道挠率在二阶摄动解时对二次涡有偏转和扭曲效应。本文还发现当雷诺数从很小值逐渐增大时,两次涡位置发生由左右相对到上下相对的有趣旋转。A steady incompressible viscous flow in a helical pipe with lowReynolds number (R < 17/ε^(1/ε) ) is investigated by the perturbation method and the usage of helical coordinate system. A second order solution is fully presented. Results show that the torsion of the pipe has turning and deforming effects on the secondary vortices. As Reynolds number increases from, two vortices of the secondary flow turn around a left-right position to an up-down position.

关 键 词：挠率 螺旋管流 二次流 二阶效应 

分 类 号：O357[理学—流体力学]