Abstract
The effect of the surface capacity HF discharge on airfoil flow-around has been studied in the situation when the oncoming flow velocity is 20 m/s and the Reynolds numbers are Re = 105. The power delivered to discharge was modulated with a frequency of 3 × 102–2 × 104 Hz, which corresponds to a Strouhal number of St = 1.2–80, and the average electric power (W av) was 50–400 W. It has been indicated that the aerodynamic drag decreased and the lift increased at stall and post-stall angles of attack when the HF dielectric barrier discharge was turned on. A nonstationary stochastic change in the C x and C y aerodynamic characteristics was observed at a stall angle in the St = 4–10 range of Strouhal numbers when the power was insufficient (W av ≈ 100 W).
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Original Russian Text © V.A. Bityurin, A.V. Efimov, P.N. Kazanskiy, A.I. Klimov, I.A. Moralev, 2014, published in Teplofizika Vysokikh Temperatur, 2014, Vol. 52, No. 4, pp. 504–511.
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Bityurin, V.A., Efimov, A.V., Kazanskiy, P.N. et al. Aerodynamic quality management for the NACA 23012 airfoil model using the surface high-frequency discharge. High Temp 52, 483–489 (2014). https://doi.org/10.1134/S0018151X1404004X
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DOI: https://doi.org/10.1134/S0018151X1404004X