Three Types of Disturbances from the Point Source in the Boundary Layer
The results of the experimental investigations presented in this paper are connected with the study of excitation and the development of disturbances of different intensity from the point source in the boundary layer of a flat plate. In the boundary layer there appear qualitative and some quantitative characteristics of the three types of disturbances: a Tollmien-Schlichting wave, a nonlinear localized structure and a turbulent spot. If two of them — a Tollmien-Schlichting wave and a turbulent spot are known, the third one — a localized disturbance is observed for the first time.
KeywordsBoundary Layer Point Source Wave Packet Flat Plate Fluid Mechanics
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- 1.Guilev, V.M.; Kachanov, Yu.S.; Koziov, V.V.: Razvitie prostranstvennogo volnovogo paketa v pogranichnom sloye. Novosibirsk, 1981, preprint ITPM SO AN SSSR N 34–81.Google Scholar
- 2.Guilev, V.M.; Dovgal, A.V.; Koziov, V.V.:Razvitie volnovogo paketa v pogranichnom sloye s gradientom davleniya. Novosibirsk, 1984, preprint ITPM SO AN SSSR N 6–84.Google Scholar
- 3.Wygnanski, I.; Haritonidis, S.H.; Kaplan, R.E.: On Toll- mien-Schlichting wave packet produced by a turbulent spot. J. on Fluid Mechanics, vol.92, pt. 3, (1979).Google Scholar