A. E. Darzhain, A. V. Boiko, V. M. Kulik, A. P. Chupakhin, “Analysis of stability of the boundary layer on a flat plate under a finite-thickness two-layer compliant coating”, Prikl. Mekh. Tekh. Fiz., 2019, Volume 60, Issue 4,Pages <nobr>35

This article is cited in 6 papers

Analysis of stability of the boundary layer on a flat plate under a finite-thickness two-layer compliant coating

A. E. Darzhain^ab, A. V. Boiko^cd, V. M. Kulik^e, A. P. Chupakhin^ab

^a Lavrentyev Institute of Hydrodynamics of Siberian Branch of the Russian Academy of Sciences, Novosibirsk, 630090, Russia
^b Novosibirsk State University, Novosibirsk, 630090, Russia
^c Khristianovich Institute of Theoretical and Applied Mechanics, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630090, Russia
^d Tyumen State University, Tyumen, 625003, Russia
^e Kutateladze Institute of Thermophysics, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630090, Russia

Abstract: Results of studying stability of the Blasius boundary layer on a two-layer compliant coating in the linear formulation are reported. The computations are based on experimental parameters of viscoelasticity of a real coating, which reveal the dependences of its elasticity modulus and loss coefficient on frequency. Parametric investigations of the influence of the coating layer thicknesses and free-stream velocity on flow stability, in particular, on the critical Reynolds number, are performed. Regions of a nonmonotonic behavior of the critical Reynolds number are found, which allow one to determine the optimal thicknesses of the upper and lower layers for intense interaction with the flow. An explanation of this effect is proposed.

Keywords: compliant coatings, boundary layer, hydrodynamic instability.

UDC: 532.526

Received: 28.01.2019
Revised: 28.01.2019
Accepted: 28.01.2019

DOI: 10.15372/PMTF20190404