Evolution of disturbances in the shock layer on a flat plate in the flow of a mixture of vibrationally excited gases
S.V. Kirilovskiy, T.V. Poplavskaya, I.S. Tsyryulnikov, and A.A.
Maslov
Khristianovich Institute of Theoretical and Applied Mechanics SB RAS, Novosibirsk, Russia
Novosibirsk State University, Novosibirsk, Russia
E-mail: kirilov@itam.nsc.ru, popla@itam.nsc.ru, tsivan@itam.nsc.ru, maslov@itam.nsc.ru
Keywords: hypersonic flows, non-equilibrium, stability
Pages: 421–430
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 con-sideration 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.
DOI: 10.1134/S0869864317030106
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