作　　者： ; ; ;

机构地区： 南京理工大学动力工程学院瞬态物理国家重点实验室

出　　处： 《实验力学》 2009年第5期427-432,共6页

摘　　要： 实验与数值模拟表明,利用电介质溶液中圆柱体侧表面附近分布的电磁场产生电磁力可有效改变圆柱流体边界层,控制圆柱绕流。本文对圆柱绕流电磁控制过程中的主要影响因素进行了实验研究,电磁包覆在圆柱表面后部时,其控制效果与全部包覆相当,而包覆在其它位置时,消涡效果较差;电磁极板窄的圆柱绕流控制效果较极板宽的消涡与减阻效果好。另外,电磁作用参数N愈大,消涡减阻的效果愈好。 Experimental and numerical results show that the electromagnetic force distributed on cylinder side surface in dielectric solution can suppress effectively the cylinder wake. Main influence factors in cylinder wake control process were investigated experimentally in the electrical low- conducting water. Results show that when localized Lorentz force applies at the cylinder rear surface, the suppression effect of cylinder wake is the same with that when Lorentz force covers all over the cylinder surface; otherwise the flow separation can not be eliminated. Moreover, the narrower electrodes and magnets, the larger interaction parameter of electromagnetic field, and the better control effect of cylinder wake.

关 键 词： 圆柱绕流 流体控制 电磁力 边界层 阻力

领　　域： [理学] [理学]