电磁力连续控制圆柱绕流态变化的研究  

Investigation of the flow field structure controlling around a circular cylinder by means of electromagnetic forces

作　　者：周本谋[1] 范宝春[1] 陈志华[2] 叶经方[1] 丁汉新[1] 

机构地区：[1]南京理工大学动力学院,南京210094 [2]华东理工大学机械工程学院,上海200037

出　　处：《流体力学实验与测量》2004年第1期10-14,共5页Experiments and Measurements in Fluid Mechanics

基　　金：国防科工委重点预研基金(项目号:KD08010)

摘　　要：作用于电介质溶液流体边界层上的Lorentz电磁力可以改变流体边界层的结构,从而控制流体绕流的形态。通过理论分析和数值模拟确定了实验控制的关键参数,交替分布的电极和磁极包覆在圆柱体的表面置于电介质溶液中,简单调整电磁力的分布可以方便地控制圆柱尾迹的流动结构,实现了电磁力消涡和增涡的连续控制。Electromagnetic body forces localized on the circular cylinder surface have been used to modify the boundary layer in the electrolyte solution. It is possible to control the configuration of cylinder wake by suitably selecting the magnetic and electric fields. The key parameters of experimental controlling have been confirmed by theoretical analysis and numerical simulation. The electrodes and the permanents are flush mounted on the cylinder surface side by side in the order of magnet N-pole, positive electrode, magnet S-pole, negative electrode, and so on. It is very easy to control the flow field structure around the circular cylinder surface by means of adjusting the distribution of the electromagnetic body forces, and it continually achieves the vortex suppression and the vortex acceleration.

关 键 词：电磁力 流体控制 边界层 圆柱尾迹 绕流 连续控制 实验 

分 类 号：O361[理学—流体力学]