Modeling of interaction of long-wave disturbances with a shock wave on a flat plate with allowance for real gas effects

• Published in: Journal of physics. Conference series Vol. 1128; no. 1; pp. 12026 - 12031
• Main Authors: Reshetova, A I, Poplavskaya, T V, Kirilovskiy, S V, Tsyrulnikov, I S
• Format: Journal Article
• Language: English
• Published: Bristol IOP Publishing 01.11.2018
• Subjects: Aerodynamics; Angle of attack; Carbon dioxide; Computational fluid dynamics; Flat plates; Fluid flow; Mathematical models; Real gases; Reynolds number; Shock waves
• ISSN: 1742-6588; 1742-6596
• DOI: 10.1088/1742-6596/1128/1/012026

The problem of the long-wave disturbance interaction with a shock wave on a wedge at an angle of attack is considered. Numerical simulations are performed by solving two-dimensional unsteady Navier-Stokes equations with the module addition created by the user and allowing taking into account the vibrational nonequilibrium of carbon dioxide molecules within the two-temperature model of relaxation flows. A parametric study on the effect of Mach numbers, Reynolds numbers and angles of attack on the disturbance transformation coefficients is carried out for the following gases: equilibrium air, equilibrium vibrationally excited CO2, and nonequilibrium CO2. The calculation results on the pressure pulsations on the model surface were compared with the data obtained for long-wave disturbance from the general solution of the inviscid problem of the disturbance interaction with a shock wave on a wedge [1]. It is shown that the obtained long wavelength disturbance transformation coefficients are practically the same as for the inviscid case in the studied range of Mach numbers (M∞=4.5÷8.9).