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Concerning the features of deformation of a compliant coating by pressure pulsations in a turbulent boundary layer

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Thermophysics and Aeromechanics Aims and scope

Abstract

Deformations of a compliant coating in a turbulent flow, measured previously and calculated in this work, are compared. The calculated spectral density of coating deformations at low frequencies (25–250 Hz) turned out to be almost two orders of magnitude higher than the measured one, and the rms value of the measured deformation was seven times lower than the calculated one. The transitional regime for stabilizing the forced coating oscillations under the action of a pressure wave is calculated. It is shown that the coating almost always works in the transition regime, without reaching the maximum deformation amplitudes that are characteristic of the steady state. It is concluded that it is necessary to use more complex boundary conditions that take into account the non-stationary character of the process because the amplitude of coating deformation varies in a complex way during the lifetime of organized structures moving in a turbulent boundary layer.

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Correspondence to V. M. Kulik.

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The work was carried out on the theme No. 20.1.3, section III of the Program of fundamental scientific research of state Academies for 2017–2020.

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Kulik, V.M. Concerning the features of deformation of a compliant coating by pressure pulsations in a turbulent boundary layer. Thermophys. Aeromech. 27, 71–80 (2020). https://doi.org/10.1134/S0869864320010060

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  • DOI: https://doi.org/10.1134/S0869864320010060

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