Publication de 6 numéros par an
ISSN Imprimer: 1948-2590
ISSN En ligne: 1948-2604
LAMINAR-TURBULENT TRANSITION ON THE LV6 LAMINARIZED AIRFOIL: NATURAL TRANSITION
RÉSUMÉ
The laminar-turbulent transition on a non-swept wing model with the LV6 laminarized airfoil is studied under natural conditions of a test section of the T-124 subsonic wind tunnel (TsAGI) at a Reynolds number of 5.5×106. It is shown that linear packets of Tollmien−Schlichting waves are formed and developed in the laminar boundary layer; the characteristics of these packets agree well with the results predicted by the linear theory of hydrodynamic stability performed for the test conditions. A comparison of the calculated and experimental data shows that, despite its long-term operation, the T-124 wind tunnel ensures a high quality of the flow and a low level of background perturbations (i.e., conditions necessary for studying the laminar-turbulent transition). The laminar-turbulent transition on the model occurs in the zone of the boundary layer separation with its subsequent turbulent reattachment. The experimental data are compared with semi-empirical models widely used in engineering practice. The data on the beginning and end of the transition zone in the separation region are found to be in good agreement.
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Baranov S. A., Kiselev A. F., Moralev I. A., Sboev D. S., Tolkachev S. N., Chernyshev S. L., Control of the Laminar-Turbulent Transition in a Three-Dimensional Boundary Layer under Elevated External Turbulence Using Dielectric Barrier Discharge, Doklady Physics, 64, 6, 2019. Crossref