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The response of a turbulent boundary layer to artificial disturbances

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Abstract

With periodic fluid injection through small slots, a turbulent boundary layer is artificially disturbed on scales that are of the order of those of the natural quasi-periodic events. The periodic phase-average of the streamwise fluid velocity is determined from hot-film measurements, and used to find the coherent velocity component as defined by the triple decomposition. It appears that, when a disturbance is active, the generated flow pattern is very similar to the one caused by the interaction of a crossflow and a jet. However, when it is terminated, the turbulent boundary layer returns to its undisturbed state.

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Author notes

  1. H. J. M. Vollebregt

    Present address: IMAG-DLO, P.O. Box 43, 6700, Wageningen, AA, Netherlands

Authors and Affiliations

  1. ECN, P.O. Box 1, 1755, Petten, ZG, Netherlands

    A. J. Brand

  2. Laboratory of Aero- and Hydrodynamics T.U.-Delft, Rotterdamseweg 145, NL-2628, Delft, AL, Netherlands

    H. J. M. Vollebregt, A. K. Wemmers & F. T. M. Nieuwstadt

Authors
  1. A. J. Brand
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  2. H. J. M. Vollebregt
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  3. A. K. Wemmers
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  4. F. T. M. Nieuwstadt
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Brand, A.J., Vollebregt, H.J.M., Wemmers, A.K. et al. The response of a turbulent boundary layer to artificial disturbances. Experiments in Fluids 14, 193–202 (1993). https://doi.org/10.1007/BF00189510

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