Massive parametric study by LES on separated- flow control around airfoil using DBD plasma actuator at Reynolds number 63,000

Makoto Sato, Koichi Okada, Taku Nonomura, Hikaru Aono, Aiko Yakeno, Kengo Asada, Yoshiaki Abe, Kozo Fujii

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

16 Citations (Scopus)


A massive number of large-eddy simulations of the separated flow over NACA0015 airfoil, which are controlled by a DBD plasma actuator, are conducted. Reynolds number based on chord length is 63,000 and the angle of attack is from 12 to 18, which are stall angle in present flow condition. The position and operation conditions of a DBD plasma actuator, (e.g. the burst frequency, the degree of induced flow and the burst ratio of actuation) are varied as parameters. It is clarified that the most effective position of the actuator to suppress the separation is vicinity of the separation point. The most effective burst frequency of burst wave to improve the lift-drag ratio is F+ ≈ 5. In the cases of these optimal position and burst frequency, the energy consumption by actuation can be reduced so much. The promotion of turbulent transition is closely related to the control of separation. The simple analyses of turbulent kinetic energy distributions clarify that the cases with quick turbulent transition over airfoil have better aerodynamic performance. In addition, other mechanisms of the separation control are also shown for each angle of attack, and the effect of control are classified in terms of the improvement of aerodynamic performances.

Original languageEnglish
Title of host publication43rd Fluid Dynamics Conference
PublisherAmerican Institute of Aeronautics and Astronautics Inc.
ISBN (Print)9781624102141
Publication statusPublished - 2013
Externally publishedYes
Event43rd AIAA Fluid Dynamics Conference - San Diego, CA, United States
Duration: 2013 Jun 242013 Jun 27

Publication series

Name43rd Fluid Dynamics Conference


Other43rd AIAA Fluid Dynamics Conference
Country/TerritoryUnited States
CitySan Diego, CA

ASJC Scopus subject areas

  • Fluid Flow and Transfer Processes
  • Energy Engineering and Power Technology
  • Aerospace Engineering
  • Mechanical Engineering


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