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Numerical Simulation of Locally-Forced Turbulent Boundary Layer
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 Title & Authors
Numerical Simulation of Locally-Forced Turbulent Boundary Layer
Ri, Gwang-Hun; Seong, Hyeong-Jin;
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 Abstract
An unsteady numerical simulation was performed to analyze flow structures behind a local suction/blowing in a flat-plate turbulent boundary layer. The local forcing was given to the boundary layer flow by means of sinusoidally oscillating jet. A version of the unsteady --f(sub)u model (Rhee and Sung 2000) was employed. The Reynolds number based on the momentum thickness was about Re(sub)=1700. The forcing frequency was varied in the range 0.011f(sup)+0.044 with a fixed forcing amplitude A(sub)o=0.4. The predicted results were compared and validated with the experimental data. It was shown that the unsteady locally-forced boundary layer flow is predicted well by the --f(sub)u model. The effect of the pitch angle of local forcing on the reduction of skin friction was also examined.
 Keywords
Low-Reynolds-Number Turbulence Model;Turbulent Boundary Layer Flow;Local Forcing;Vortex Merging;
 Language
Korean
 Cited by
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