| Abstract: | The study considers emission of Tollmien—Schlichting waves by a vibrator mounted on a plate with a viscous incompressible fluid flowing round it. It is shown that by changing the shape of a membrane working at a supercritical frequency, it is possible not only to reduce greatly the amplitude of the forced oscillations, but also to achieve their complete degeneration. This possibility opens the door to the suppression of an already formed Tollmien—Schlichting wave by a vibrator with specially chosen parameters. This type of equipment makes it possible to suppress perturbations in a laminar boundary layer and delay its transition to the turbulent state.Translated from Izvestiya Akademii Nauk SSSR, Mekhanika Zhidkosti i Gaza, No. 2, pp. 20–26, March–April, 1987.The authors are grateful to the referee V. A. Buchin for a useful observation expressed in the course of preparation of the article for the press. |
