摘要
流体绕过非流线物体时,在物体尾部形成涡街,使其表面周期性变化的阻力和升力增加,从而导致物体振荡,产生噪音。本文通过实验和计算,研究圆柱绕流的电磁控制,阐述浸于弱电介质溶液中,表面包覆电磁激活板的圆柱,在电磁力作用下的流体控制原理,讨论电磁力的消涡、减阻和减振过程。
The vortex shedding observed in the wake behind a bluff body increases drag and lift forces on the body surface. The fluctuations of drag and lift forces usually result in the body vibrating and the flow-induced noise in the wake region to lead to the unexpected engineering effects. Combined the experiments with calculation, the electromagnetic control to cylinder wake is discussed, and the governing mechanism of wake control by magnetohydrodynamic forces is elucidated. The possible measures of vortex suppression, resistance reduction and vibration control are indicated finally.
出处
《应用力学学报》
EI
CAS
CSCD
北大核心
2005年第4期522-526,共5页
Chinese Journal of Applied Mechanics
基金
国防科工委基础性研究课题(南理工:KD0890)
关键词
电磁流体力学
流体控制
振动
electromagnetic fluid mechanics,flow control,vibration.
