Lorentz力对弱导电流体中圆柱受力的影响

被引：6

作者：

张辉

范宝春

陈志华

周本谋

机构：

[1] 南京理工大学瞬态物理实验室

来源：

水动力学研究与进展A辑 | 2007年 / 06期

关键词：

圆柱尾流; Lorentz力; 阻力; 流体控制;

D O I：

10.16076/j.cnki.cjhd.2007.06.004

中图分类号：

O361 [电磁流体力学];

学科分类号：

080103 ;

摘要：

电磁力(Lorentz力)可以改变弱导电流体边界层的结构,从而影响物体受力状况。该文将电磁激活板包覆在圆柱表面,置于弱电解质溶液中,从实验上测试并分析了Lorentz力对圆柱所受阻力的影响。为了揭示其影响过程的内在机理,对此现象进行了细致的数值研究,着重讨论了Lorentz力对圆柱阻力的各种组成部分的因素,揭示了Lorentz力主要通过改变圆柱表面涡量梯度及涡量来影响圆柱受力变化的内在过程。结果表明,在一定范围内,随着Lorentz力的增大,圆柱的表面涡量增大,流体分离点后移,表面涡量,阻力的振动幅度减小至零,圆柱所受阻力减小。

引用

页码：766 / 773

页数：8

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