| Autor: |
Brand, A. J., Vollebregt, H. J. M., Wemmers, A. K., Nieuwstadt, F. T. M. |
| Zdroj: |
Experiments in Fluids; January 1993, Vol. 14 Issue: 3 p193-202, 10p |
| Abstrakt: |
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. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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