Experimental study of separation bubble control behind a backward-facing step using plasma actuators

被引：0
作者：
Sohrab Gholamhosein Pouryoussefi
Masoud Mirzaei
Majid Hajipour
机构：
[1] K.N. Toosi University of Technology,Department of Aerospace Engineering
来源：
Acta Mechanica | 2015年 / 226卷
关键词：
Vortex; Shear Layer; Dielectric Barrier Discharge; Separation Bubble; Free Stream Velocity;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
In this paper, controlling flow around a backward-facing step by means of a dielectric barrier discharge plasma actuator is experimentally investigated. The pressure distribution on the step surface as well as the natural oscillations of the flow in the shear layer at three different Reynolds numbers from 18,000 to 54,000 (based on the step height) are measured in the wind tunnel. Then, by installing plasma actuators at different positions, the changes in pressure distribution and the length of the separation bubble are investigated. It was found that for controlling the separation bubble and expediting the flow recovery process the best position for installation of the plasma actuator is the upstream of the separation point i.e., step tip edge. Installing the actuator inside the separation bubble has a relatively low effect on the separation zone length. In addition, the most effective way for exciting the shear layer is utilizing the unsteady actuation with an exciting frequency equal to the natural frequency of the vortex shedding.
引用
收藏
页码：1153 / 1165
页数：12
相关论文
共 42 条
  • [1] Spazzini P.G.(2001)Unsteady behavior of backward-facing step flow Exp. Fluids 30 551-561
  • [2] Iuso G.(2009)The dynamics of the transitional flow over a backward-facing step J. Fluid Mech. 623 85-119
  • [3] Omorato M.(1988)Effects of the separating shear layer on the reattachment length and wall shear stress Exp. Fluids 6 493-499
  • [4] Zurlo N.(1983)Experimental and theoretical investigation of backward-facing step flow J. Fluid Mech. 127 473-496
  • [5] Di Cicca G.M.(2002)Particle image velocimetry measurements of a backward-facing step flow Exp. Fluids 33 838-853
  • [6] Schafer F.(1992)The flow over a backward-facing step under controlled perturbation: laminar separation J. Fluid Mech. 238 73-96
  • [7] Breuer M.(1996)Control of turbulent separated flow over a backward-facing step by local forcing Exp. Fluids 21 417-426
  • [8] Durst F.(1986)Control of coherent structures in reattaching laminar and turbulent shear layers AIAA J. 24 1956-1963
  • [9] Adams E.W.(2005)Experimental application of an active control loop on backward-facing step flow AIAA J. 43 1176-1186
  • [10] Johnston J.P.(2009)Single dielectric barrier discharge plasma enhanced aerodynamics: physics, modeling and applications Exp. Fluids 46 1-26
12345