A comparative flow physics study of Ns-DBD vs Ac-DBD plasma actuators for transient separation control on a NACA 0012 airfoil

Claudia Durasiewicz, Ashish Singh, Jesse C Little

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

7 Scopus citations

Abstract

Nanosecond (ns) and alternating current (ac) dielectric barrier discharge (DBD) plasma actuators are studied in a transient separation control setup. The effects of forcing on flow over a NACA 0012 airfoil in stall (AoA = 18) at a Reynolds number of 740,000 are compared. The flow response to single pulse forcing with time scales much less than the convective time is investigated with the aid of 2-D PIV. The experiment is carried out by phase averaging over different time delays after the actuation pulse ranging t/Tconv = 0 to 10. Pulse energy is varied by a factor of three, but minimal impact on the two actuation mechanisms is observed. The results indicate a somewhat surprising similarity in the global flow response to ns-DBD (thermal) and ac-DBD (momentum) actuation mechanisms. The location, structure and strength of the excited vortical structures are compared and local variations originating from different actuation mechanisms are observed. Ns-DBD induced perturbations are found to be stronger at a given level of electrical energy. However the differences in global flow response are small.

Original languageEnglish (US)
Title of host publicationAIAA Aerospace Sciences Meeting
PublisherAmerican Institute of Aeronautics and Astronautics Inc, AIAA
Edition210059
ISBN (Print)9781624105241
DOIs
StatePublished - Jan 1 2018
EventAIAA Aerospace Sciences Meeting, 2018 - Kissimmee, United States
Duration: Jan 8 2018Jan 12 2018

Other

OtherAIAA Aerospace Sciences Meeting, 2018
CountryUnited States
CityKissimmee
Period1/8/181/12/18

ASJC Scopus subject areas

  • Aerospace Engineering

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    Durasiewicz, C., Singh, A., & Little, J. C. (2018). A comparative flow physics study of Ns-DBD vs Ac-DBD plasma actuators for transient separation control on a NACA 0012 airfoil. In AIAA Aerospace Sciences Meeting (210059 ed.). American Institute of Aeronautics and Astronautics Inc, AIAA. https://doi.org/10.2514/6.2018-1061