| Abstract: | Surface irregularities and vibration, free-stream turbulence and other factors lead to the penetration of three-dimensional perturbations into the boundary layer. Classical research on the transitional boundary layer has been restricted to a low degree of turbulence and the introduction of a plane perturbation wave. The present study concentrates on the development of three-dimensional perturbations created in a model experiment, both mechanically and by means of plane elastic plates, for various Reynolds numbers. The results are analyzed on the basis of the measured spectral and correlation characteristics.Paper presented at the Fifth Conference on Theoretical and Applied Mechanics, Alma-Ata (1981) [1].Translated from Izvestiya Akademii Nauk SSSR, Mekhanika Zhidkosti i Gaza, No. 5, pp. 68–74, September–October, 1985. |
