The wake flow control behind a circular cylinder using ion wind

被引:37
作者
Hyun, KT [1 ]
Chun, CH [1 ]
机构
[1] Pohang Univ Sci & Technol, Dept Mech Engn, Pohang 790784, South Korea
关键词
D O I
10.1007/s00348-003-0668-z
中图分类号
TH [机械、仪表工业];
学科分类号
0802 ;
摘要
Active and passive flow control methods have been studied for decades, but there have been only a few studies of flow control methods using ion wind, which is the bulk motion of neutral molecules driven by locally ionized air from a corona discharge. This paper describes an experimental study of ion wind wake control behind a circular cylinder. The experimental conditions consisted of a range of electrohydrodynamic numbers-the ratio of an electrical body force to a fluid inertial force-from 0 to 2 and a range of Reynolds numbers from 4x10(3) to 8x10(3). Pressure distributions over the cylinder surface were measured and flow visualizations were carried out using a smoke-wire method. The flow visualizations confirmed that ion wind significantly affects the wake structure behind a circular cylinder, and that the pressure drag can be dramatically reduced by superimposing ion wind.
引用
收藏
页码:541 / 552
页数:12
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