弯曲流道内二次流动的运动学分析和数值可视化方法  

Kinematic analysis and digital visualization of secondary flow in curved square passage

作　　者：刘庆龙[1] 戴斌[1] 戴韧[1] 陈康民[1] 

机构地区：[1]上海理工大学能源与动力工程学院,上海200093

出　　处：《航空动力学报》2010年第12期2721-2727,共7页Journal of Aerospace Power

基　　金：上海市重点学科建设(J50501)

摘　　要：通过运动学分析,得到了涡量与二次流之间的关系方程,介绍了弯曲流道内二次流结构的可视化方法.以截面法向涡量为基础,可求解得到与涡量对应的二次流速度场.该方法具有以下几个特点:从运动学求解得到的涡量与二次流流函数之间的方程,直接体现了二次流作为涡的特性,且作为分析流动结构的后处理方法,能够量化地求解出二次流速度以及分布情况.该方法消除了位势流的影响,使二次流显示更加真实清晰,这种方法比速度矢量图法更加准确完善.The equation between secondary flow and vorticity was established through kinematic analysis.One method of digital visualization for secondary flow in curved passage was presented.Secondary flow velocity can be obtained from cross section normal vorticity.Some advantages of this method are below：the equation describes secondary flow as vortices.The influence of potential flow is eliminated.Quantizing secondary flow field can be figured out.More complicated secondary structure is observed.The visualization is more accurate than representation of velocity vector,and doesn＇t depend on the normal direction of cross section.

关 键 词：二次流 涡量 运动学分析 可视化 涡系结构 

分 类 号：TK474.7[动力工程及工程热物理—动力机械及工程]