Abstract
The results of the numerical and experimental investigations of the evolution of the disturbances in a hypersonic shock layer on a flat plate streamlined by a flow of the mixture of vibrationally excited gases are presented. The experimental study was conducted in the hot-shot high-enthalpy wind tunnel IT-302 of the ITAM SB RAS. The numerical simulation was carried out with the aid of the ANSYS Fluent package using the solution of the unsteady two-dimensional Navier−Stokes equations with the incorporation of the user-created modules and enabling the consideration of the vibrational non-equilibrium of the carbon dioxide molecules within the framework of the model of the two-temperature aerodynamics. It was obtained that an increase in the carbon dioxide concentration in the mixture with air leads to a reduction of the intensity of pressure disturbances on the surface. The efficiency (up to 20 %) of the method of sound absorbing coatings in the vibrationally excited flows of the mixture of the carbon dioxide and air has been shown.
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The work was financially supported by the Russian Foundation for Basic research (Grant No. 16-08-00674).
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Kirilovskiy, S.V., Poplavskaya, T.V., Tsyryulnikov, I.S. et al. Evolution of disturbances in the shock layer on a flat plate in the flow of a mixture of vibrationally excited gases. Thermophys. Aeromech. 24, 421–430 (2017). https://doi.org/10.1134/S0869864317030106
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DOI: https://doi.org/10.1134/S0869864317030106