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Russia Izhevsk; Moscow; Zhukovsky
Section Mechanics
Title Theoretical investigation of conditions for the appearance of high-speed bufting
Author(-s) Lipanov A.M.a, Karskanov S.A.b, Chernyshev S.L.c, Lipatov I.I.c
Affiliations Keldysh Institute of Applied Mathematics, Russian Academy of Sciencesa, Udmurt Federal Research Center, Ural Branch of the Russian Academy of Sciencesb, Central Aerohydrodynamic Institutec
Abstract Numerically, the phenomenon of the appearance of high-speed bufting is investigated for the case of a transonic flow past the NACA0012 airfoil. A mathematical model based on high-order approximation algorithms is formulated, which makes it possible to calculate nonstationary separated flows. The model is based on the integration of quasi-hydrodynamic equations. A parametric investigation of high-velocity viscous gas flow past an airfoil as a function of the angle of attack is carried out. Both instantaneous and averaged flow patterns are analyzed. The distributions of the pulsation characteristics of flows are obtained at different angles of attack. Regularities in the onset of detachment of the boundary layer are revealed, and the effect of shock waves on the nature of the flow near the surface of the airfoil is determined. The critical angle of attack at which high-speed bufting begins is determined.
Keywords high-speed buffeting, shock waves, quasi-hydrodynamic equations, direct numerical simulation, high-order approximation
UDC 533.6, 519.6
MSC 35Q30, 76G25
DOI 10.20537/vm190308
Received 3 July 2019
Language Russian
Citation Lipanov A.M., Karskanov S.A., Chernyshev S.L., Lipatov I.I. Theoretical investigation of conditions for the appearance of high-speed bufting, Vestnik Udmurtskogo Universiteta. Matematika. Mekhanika. Komp'yuternye Nauki, 2019, vol. 29, issue 3, pp. 382-395.
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