Experimental study of effects of frequency for burst wave on a DBD plasma actuator for separation control

Satoshi Sekimoto, Taku Nonomura, Kozo Fujii

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

Abstract

This study focuses on the multiple separation-control mechanisms of burst actuation with a dielectric barrier discharge plasma actuator. Control of separated flow around a NACA 0015 airfoil at the Reynolds number 63,000 is investigated with a plasma actuator mounted at 5% chord length from the leading edge. A parametric study on burst frequency and input voltage are conducted on three post-stall angles using time-averaged pressure measurements and time-resolved particle imaging velocimetry (PIV). Trailing edge pressure is chosen for the index of separation control and it indicates that optimum burst frequency is different at each angle of attack. Then, the several flow fields are discussed in detail and the two different flow-control mechanisms are clarified: utilization of large vortex and promotion of turbulent transition. With regard to the first mechanism, the phase-lock PIV indicates that vortex structure, whose size is larger with lower burst frequency in this experimental range, is shed from shear layer for each burst actuation. With regard to the second mechanism, time-averaged pressure and PIV measurements reveal that burst frequency of F+ = 6-10 has a capability for promotion of turbulent transition. Comparing these two mechanisms, only utilizing large vortex structure is effective in higher angle of attack, and, on the other hand, promotion of turbulent transition works better at around the stall angle for separation control.

Original languageEnglish
Title of host publication54th AIAA Aerospace Sciences Meeting
PublisherAmerican Institute of Aeronautics and Astronautics Inc, AIAA
ISBN (Print)9781624103933
Publication statusPublished - 2016 Jan 1
Externally publishedYes
Event54th AIAA Aerospace Sciences Meeting, 2016 - San Diego, United States
Duration: 2016 Jan 42016 Jan 8

Publication series

Name54th AIAA Aerospace Sciences Meeting

Other

Other54th AIAA Aerospace Sciences Meeting, 2016
CountryUnited States
CitySan Diego
Period16/1/416/1/8

ASJC Scopus subject areas

  • Aerospace Engineering

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    Sekimoto, S., Nonomura, T., & Fujii, K. (2016). Experimental study of effects of frequency for burst wave on a DBD plasma actuator for separation control. In 54th AIAA Aerospace Sciences Meeting (54th AIAA Aerospace Sciences Meeting). American Institute of Aeronautics and Astronautics Inc, AIAA.