Showing papers by "Moscow Institute of Physics and Technology published in 1985"

Excitation of Instability Waves by a Vibrator Localized in the Boundary Layer

Abstract: A theoretical model of the disturbances generated by the vibrations of the streamlined surface in the boundary layer is discussed. The analysis was performed with the aid of the expansion of the solution in eigenfunctions of linearized Navier-Stokes equations with nonparallelism of the flow in a real boundary layer taken into account. High efficiency of the excitation of Tollmien-Schlichting (TS) waves has been found.

Excitation of Tollmien-Schlichting Waves by Acoustic Disturbances in a Compressible Boundary Layer

Abstract: This work represents a theoretical study of the excitation of TS waves by acoustic waves on inhomogeneity resulting from the nonparallelism of the boundary-layer flow. The analysis is carried on for a compressible boundary layer. The mathematical model is based on perturbation theory method.

Interaction of Vortex Disturbances and Boundary Layer on Blunt Bodies

Abstract: Penetration of incompressible fluid vortex disturbances into the boundary layer on the body with stagnation point is investigated by the matched asymptotic expansion method. Tollmien-Schlichting waves generation by the vortex disturbances in a boundary layer has been considered.

On the Issue of the Nonlinear Theory of the Instability Waves

Abstract: The method of matching asymptotic expansions is used to investigate the nonlinear nonstationary waves with nonlinear critical layer. The structure of the nonlinear nonstationary critical layer is studied. The time function of the wave amplitude has been obtained.