Accession Number : AD0683085

Title :   SECONDARY INSTABILITY OF THE BOUNDARY LAYER,

Corporate Author : FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO

Personal Author(s) : Maseev,L. M.

Report Date : 10 JUL 1968

Pagination or Media Count : 11

Abstract : The article starts with a statement of the general problem of hydrodynamic instability. The transition from laminar to turbulent flow may be considered from the viewpoint of the development of infinitely small perturbations distributed over the whole field of flow. It was demonstrated and experimentally verified that the boundary layer is unstable with respect to Tomlin-Schlichting perturbations, which are waves propagating downstream along the flow. In the case of neutral perturbations, the amplitude of the carrier wave remains constant. Theory gives a value of approximately 420 for the critical Reynolds number. The article proceeds to set up a system of differential equations describing the problem of the instability of the boundary layer. The solution is carried out by the method of Kantorovich, which involves the reduction of the system of equations in partial derivatives to a system of ordinary differential equations. (Author)

Descriptors :   (*HYDRODYNAMICS, TURBULENCE), (*BOUNDARY LAYER, STABILITY), BOUNDARY LAYER TRANSITION, PERTURBATION THEORY, REYNOLDS NUMBER, DIFFERENTIAL EQUATIONS, USSR

Subject Categories : Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE