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Stability and transition to turbulence in boundary layers with a pressure gradient over a compliant monolithic coating
D. A. Ashurov Steklov Mathematical Institute of Russian Academy of Sciences, 119991, Moscow, Russia
Abstract:
This paper describes the study of a linear formulation of a problem of the stability of boundary layers with a pressure gradient, which are formed in a flow around surfaces with a single-layer viscoelastic coating. Calculations account for a change in the external flow velocity in the longitudinal direction, and experimental dependences describing the coating characteristics and frequency are used. The $\mathrm{e}^N$ method is used to estimate the influence of a compliant coating on the position of a laminar-turbulent transition region is estimated. It is shown that, even in the case of a sufficiently rigid coating, a laminar-turbulent transition in a boundary layer with a favorable pressure gradient can be delayed along the longitudinal coordinate by approximately 41%.
Keywords:
compliant coatings, boundary layer, hydrodynamic stability, laminar-turbulent transition.
Received: 18.05.2021 Revised: 17.06.2021 Accepted: 28.06.2021
Citation:
D. A. Ashurov, “Stability and transition to turbulence in boundary layers with a pressure gradient over a compliant monolithic coating”, Prikl. Mekh. Tekh. Fiz., 63:3 (2022), 139–151; J. Appl. Mech. Tech. Phys., 63:3 (2022), 494–504
Linking options:
https://www.mathnet.ru/eng/pmtf59 https://www.mathnet.ru/eng/pmtf/v63/i3/p139
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Abstract page: | 28 | References: | 5 | First page: | 1 |
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