| 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 |
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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 |
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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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