Significance of three-dimensional unsteady flows inside the cavity on separated- flow control around an NACA0015 using a synthetic jet

Yoshiaki Abe, Koichi Okada, Makoto Sato, Taku Nonomura, Kozo Fujii

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

2 Citations (Scopus)

Abstract

The simulation of a separation control using a synthetic jet around an NACA0015 airfoil at Reynolds number 63,000 is conducted by a large-eddy simulation (LES) with a compact difference scheme. The synthetic jet is installed at a leading edge and actuated with nondimensional frequencies F+ = 1:0 and 6:0, which is numerically modeled by a threedimensional deforming cavity: "Cavity model" and a two-dimensional boundary condition on the airfoil: " Bc model". The aerodynamic coefficients of the controlled flows are similarly recovered from those of the separated flow using both of the Cavity and Bc model. However, the time-averaged values and flow fields are significantly different in two models, and the use of Bc model on the three-dimensional analysis is not proper. In the case with F+ = 6, a turbulent transition near the leading edge occurs much earlier with the Cavity model than the Bc model. This result indicates that the spanwise disturbance from the cavity to the separated shear layer should be carefully considered when three-dimensional unsteady analysis is conducted by LES.

Original languageEnglish
Title of host publication43rd Fluid Dynamics Conference
PublisherAmerican Institute of Aeronautics and Astronautics Inc.
ISBN (Print)9781624102141
DOIs
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

Other

Other43rd AIAA Fluid Dynamics Conference
CountryUnited States
CitySan Diego, CA
Period13/6/2413/6/27

ASJC Scopus subject areas

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

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