Flow control around a pitching oscillation circular cylinder using a dielectric barrier discharge plasma actuator

Abstract

This paper discusses flow control around a stationary and pitching oscillation circular cylinder using a dielectric barrier discharge plasma actuator (PA). The pressure on the cylinder surface was measured to determine the lift and drag forces on the cylinder, and the differences between these values were investigated with and without the PA actuations. The results indicated that the time-averaged lift force increased by up to 140% for the 180° rotating cylinder. Additionally, the effect of the PA on the lift-hysteresis curve of the pitching cylinder was evaluated based on the temporal variation in the surface pressure. Moreover, to investigate the effect of the PA on the flow field, smoke wire and LED-PIV methods were used to visualize the flow around the cylinder. The results showed that PA promotes the mixing between the freestream and separated flow which makes the separated shear layer thicker for both stationary and a pitching oscillating cylinder. For the pitching oscillating cylinder, the flow fields modified by PA actuation are different depending on the direction of the rotation of the cylinder. These results indicate that PA enhances the circulation of the flow around the cylinder.

Filament analysis based on mathematical morphology of surface dielectric barrier discharges in N2/O2 mixtures

“…2 Particularly regarding surface dielectric barrier discharge (SDBD), extensive research has been done on airflow control using ionic wind caused by discharge. 3 With DBD, an electric field applied from outside is canceled by charge accumulation on the dielectric surface between electrodes. That is, charge distribution on the dielectric surface must be explored to explain physical properties of DBD.…”

“…Dielectric barrier discharge (DBD) has already found industrial applications, such as surface treatment 1 and ozonizers 2 . Particularly regarding surface dielectric barrier discharge (SDBD), extensive research has been done on airflow control using ionic wind caused by discharge 3 . With DBD, an electric field applied from outside is canceled by charge accumulation on the dielectric surface between electrodes.…”

Experimental and numerical study on atmospheric‐pressure air dielectric barrier discharge via 50 Hz/5000 Hz dual‐frequency excitation

“…Atmospheric pressure air dielectric barrier discharges (DBDs) are widely utilised in generating the non-thermal plasma for various applications, including gas purification and conversion [1][2][3], active flow control [4][5][6], plasma medicine [7][8][9], and seed germination [10][11][12]. Due to the presence of a dielectric, the DBD reactor is powered by either the pulse [13] or alternative current (AC) power [14].…”

Effect of nitrogen/oxygen ratios on surface charge distributions generated by repetitive surface dielectric barrier discharges

“…Dielectric Barrier Discharge (DBD) has been used in industrial applications such as surface treatment [1] and ozone generation [2]. In the field of surface DBD (SDBD), airflow control [3] using the ionic wind generated via discharge [4] * Author to whom any correspondence should be addressed. has been studied extensively.…”