文章摘要
引用本文:吴延龙, 马玉伟, 俞建阳.DBD等离子体非定常激励下的平板流场结构分布研究[J].航天器环境工程,2018,35(4):336-341 本文二维码信息
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DBD等离子体非定常激励下的平板流场结构分布研究
Numerical study of flow structure over a flat plate actuated by unsteady DBD plasma
投稿时间:2018-06-11  修订日期:2018-08-21
DOI:10.3969/j.issn.1673-1379.2018.04.005
中文关键词:  介质阻挡放电等离子体  流动控制  简化模型  大涡模拟
English Keywords:dielectric-barrier-discharge plasma (DBD plasma)  flow control  simplified model  large eddy simulation
基金项目:
作者单位
吴延龙1, 马玉伟2, 俞建阳3 1. 中国空间技术研究院, 北京 100094

2. 北京空间飞行器总体设计部
, 北京 100094

3. 哈尔滨工业大学 航天学院
, 哈尔滨 150001 
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中文摘要:
      文章采用DBD等离子体简化模型,基于大涡模拟方法,对DBD等离子体作用下的流场进行数值模拟研究,探讨等离子体非定常激励作用下平板流动的流场结构特点。结果表明:等离子体作用下,在近壁区形成了一系列的正负涡对结构,涡对的产生促进了近壁区内流体与主流流体的能量交换,时均结果表现为从等离子体作用点形成向下游发展的壁面射流;在等离子体作用点下游0.5b的位置,等离子体最大诱导速度UDBD随激励强度Dc呈指数形式增加。
English Summary:
      In the present work, the dielectric-barrier-discharge (DBD) plasma actuator is employed to study the flow structures over a flat plat. A simplified DBD plasma model is established by treating the plasma effect as the body force to be implemented into the Navier-Stokes equations and solved by the large eddy simulation (LES) method. The results show that a series of vortex pairs in the dipole formation and in a periodic distribution are generated in the boundary layer as soon as the DBD plasma actuator is applied to the flow over a flat plane. They enhance the momentum transfer between the near wall region and the free stream. At the location of x=0.5b downstream the actuator, the maximum induced velocity is found to follow a power-increased law for the actuation strength applied.
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