航空学报 > 2016, Vol. 37 Issue (6): 1743-1752   doi: 10.7527/S1000-6893.2016.0006

DBD涡流发生器及其在角区流动控制中的数值研究

徐向南, 张华, 胡波   

  1. 北京航空航天大学 航空科学与工程学院 教育部流体力学重点实验室, 北京 100083
  • 收稿日期:2015-10-21 修回日期:2016-01-05 出版日期:2016-06-15 发布日期:2016-01-11
  • 通讯作者: 张华 男,博士,教授,硕士生导师。主要研究方向:旋涡与分离流动,流动控制,风工程,风沙两项流动。Tel:010-82339908 E-mail:Ltszhh@buaa.edu.cn E-mail:Ltszhh@buaa.edu.cn
  • 作者简介:徐向南 男,硕士。主要研究方向:流动控制。E-mail:huilieri@163.com;胡波 男,博士研究生。主要研究方向:旋涡与分离流动,流动控制。E-mail:hubohubo666@163.com
  • 基金资助:

    国家自然科学基金(11372027)

Numerical study of DBD vortex generator and application in junction flow control

XU Xiangnan, ZHANG Hua, HU Bo   

  1. Ministry-of-Education Key Laboratory of Fluid Mechanics, School of Aeronautic Science and Engineering, Beihang University, Beijing 100083, China
  • Received:2015-10-21 Revised:2016-01-05 Online:2016-06-15 Published:2016-01-11
  • Supported by:

    National Natural Science Foundation of China (11372027)

摘要:

为明确介质阻挡放电(DBD)涡流发生器对马蹄涡的影响,在采用唯象模型的基础上,通过数值方法研究了DBD涡流发生器诱导产生流向涡的结构特性及其对马蹄涡的控制特性。研究结果表明,流动在激励器上游边缘处形成羊角涡,自由剪切层卷入流向涡的涡核并为其提供持续涡量;在柱体根部角区流动中,当对称面两侧激励器诱导流动指向对称面,诱导涡与马蹄涡环绕方向相反时,马蹄涡可以得到有效抑制,反之,则控制效果不佳。最后得出,诱导涡对下游马蹄涡的控制机制体现在其黏性扩散作用、掺混作用以及低压效应3个方面。

关键词: DBD涡流发生器, 数值模拟, 流向涡, 角区流动, 马蹄涡

Abstract:

In order to explore the effects of dielectric barrier discharges (DBD) vortex generator on the horseshoe vortex, the phenomenological model is applied in the paper to the numerical simulation. The characteristics of the streamwise vortex structure and its control on the horseshoe vortex are analyzed. The results indicate that the tornado-like vortex is formed at the edge of the upstream electrode, and streamwise vortex engulfs the free shear layer and gains continuous vortices. When the induced flows on the two sides of symmetry plane point to the symmetry and the direction of the induced vortex is opposite to the horseshoe vortex, the strength of horseshoe vortex can be suppressed effectively in junction flow at the root of the cylinder. Otherwise the control effect is poor. Three factors, the viscous diffusion of the induced vortex on horseshoe vortex, and the mixing and low pressure of the induced vortex, related to the control mechanism are pointed out.

Key words: DBD vortex generator, numerical simulation, streamwise vortex, junction flow, horseshoe vortex

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