Receptivity of the Flat-Plate Boundary Layer to Free-Stream Turbulence |
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Authors: | M V Ustinov |
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Abstract: | The linear problem of generation of perturbations of a flat-plate boundary layer by external turbulence is solved. The turbulence is represented in the form of a set of space- and time-periodic vortex modes. It is shown that the boundary layer is most receptive to low-frequency longitudinal vorticity modes. The mean-square velocity fluctuations in the boundary layer and their spectrum are found for isotropic turbulence with a spectrum satisfying the Kolmogorov-Obukhov law. |
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Keywords: | laminar-turbulent transition turbulence receptivity boundary layer |
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