Separation control using dielectric barrier discharge-induced suction and vortex generation

Seong kyun Im, Moon Soo Bak, M. Godfrey Mungal, Mark A. Cappelli

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We investigate the characteristics of vortices induced by spanwise forcing using a streamwise oriented dielectric barrier discharge (DBD) with and without a boundary layer suction channel, the flow of which is also driven by a DBD. The velocity field over various regions in the vicinity of the actuator is obtained by ensemble averaging particle image velocimetry. Increased boundary layer thinning and a stronger downward motion are seen near the powered flow-exposed electrode when the DBD is used in conjunction with a suction slot. The effect of varying the applied voltage and freestream velocity on the induced flow is examined. Studies are carried out on the ability for such a structure to control separation on an inclined flat plate and ramp. We find that DBD actuation together with boundary layer suction leads to more robust separation control in these adverse pressure gradient configurations.

Original languageEnglish
Title of host publication6th AIAA Flow Control Conference 2012
Publication statusPublished - 2012
Externally publishedYes
Event6th AIAA Flow Control Conference 2012 - New Orleans, LA, United States
Duration: 2012 Jun 252012 Jun 28

Publication series

Name6th AIAA Flow Control Conference 2012

Conference

Conference6th AIAA Flow Control Conference 2012
CountryUnited States
CityNew Orleans, LA
Period12/6/2512/6/28

ASJC Scopus subject areas

  • Fluid Flow and Transfer Processes
  • Aerospace Engineering
  • Control and Systems Engineering

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  • Cite this

    Im, S. K., Bak, M. S., Godfrey Mungal, M., & Cappelli, M. A. (2012). Separation control using dielectric barrier discharge-induced suction and vortex generation. In 6th AIAA Flow Control Conference 2012 (6th AIAA Flow Control Conference 2012).