Dielectric-barrier-discharge vortex generators: characterisation and optimisation for flow separation control
Dielectric-barrier-discharge vortex generators: characterisation and optimisation for flow separation control
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DOI：
10.1007/s00348-011-1213-0
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发表时间：
2012-02-01
影响因子：
2.4
通讯作者：
Choi, Kwing-So
中科院分区：
文献类型：
--
作者：
Jukes, Timothy N.;Choi, Kwing-So
我们研究了使用介质阻挡放电等离子体激励器作为涡流发生器的流动分离控制应用。等离子体激励器被放置在一个偏航角来流，使他们产生展向壁射流。通过与迎面而来的附面层相互作用，这就产生了流向纵向涡。在本实验中，研究了偏航角、激励器长度和等离子体诱导速度比的影响。特别注意的是旋涡的形成机制及其下游的发展。然后，DBD等离子体致动器以同向旋转和反向旋转涡阵列的形式应用于控制后缘斜坡上的流动分离。结果发现，涡流发生器是成功的，在减少分离区，即使在等离子体的自由流的速度比小于10%。
We investigated the use of dielectric-barrier-discharge plasma actuators as vortex generators for flow separation control applications. Plasma actuators were placed at a yaw angle to the oncoming flow, so that they produced a spanwise wall jet. Through interaction with the oncoming boundary layer, this created a streamwise longitudinal vortex. In this experimental investigation, the effect of yaw angle, actuator length and plasma-induced velocity ratio was studied. Particular attention was given to the vortex formation mechanism and its development downstream. The DBD plasma actuators were then applied in the form of co-rotating and counter-rotating vortex arrays to control flow separation over a trailing-edge ramp. It was found that the vortex generators were successful in reducing the separation region, even at plasma-to-free-stream velocity ratios of less than 10%.