, Volume 50, Issue 3, pp 323-330

High-frequency actuator control of air flow near a circular cylinder: Impact of the discharge parameters on the cylinder aerodynamic drag

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Abstract

The impact of capacitive high-frequency surface discharge on a flow around a circular cylinder is studied at airflow velocity of 20–100 m/s and the Reynolds numbers Re < 2.4 × 105. The power of the discharge was modulated at a frequency of 102–104 Hz, corresponding to the Strouhal number St = 0.1–10. It is shown that the distribution of pressure in the wake behind the cylinder is significantly influenced by the discharge. A decrease in the average diameter of the wake is observed. The parameters of the discharge were measured: the gas temperature, heating rate in the discharge region, and velocity of discharge propagation.

Original Russian Text © P.N. Kazanskyi, A.I. Klimov, I.A. Moralev, 2012, published in Teplofizika Vysokikh Temperatur, 2012, Vol. 50, No. 3, pp. 346–353.