Application of an AC barrier discharge actuator to control airflow separation above a NACA 0015 airfoil: Optimization of the actuation location along the chord

Abstract. In this study, effect of plasma actuator on a flat plate and manipulation of flow separation on NACA0015 airfoil with plasma actuator at low Reynolds numbers were experimentally investigated. In the first section of the study, plasma actuator which consists of positive and grounded electrode couple and dielectric layer, located on a flat plate was actuated at different frequencies and peak to peak voltages in range of 3-5 kHz and 6-12 kV respectively. The induced air flow velocity on the surface of flat plate was measured by pitot tube at different locations behind the actuator. The influence of dielectric thickness and unsteady actuation with duty cycle was also examined. In the second section, the effect of plasma actuator on NACA0015 airfoil was studied at Reynolds number 15000 and 30000. Four plasma actuators were placed at x/C = 0.1, 0.3, 0.5 and 0.9, and different electrode combinations were activated by sinusoidal signal. Flow visualizations were done when the attack angles were 0°, 5°, 10°, 15° and 20°. The results indicate that up to the 15° attack angle, the separated flow was reattached by plasma actuator at 12kV peak to peak voltage and 4 kHz frequency. However, 12 kV pp voltage was insufficient to reattach the flow at 20° angle of attack. The separated flow could be reattached by increasing the voltage up to 13 kV. Lift coefficient was also increased by the manipulated flow over the airfoil. Results showed that even high attack angles, the actuators can control the flow separation and prevent the airfoil from stall at low Reynolds numbers.

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“…Jolibois et al [9] optimizes the actuator location along the chord. They showed reduction in power consumption by duty cycles.…”

Section: Introductionmentioning

confidence: 99%

Active Control of Flow around NACA 0015 Airfoil by Using DBD Plasma Actuator

Akansu

Karakaya

Şanlisoy

2013

EPJ Web of Conferences

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“…The mechanism used by the ac-DBD for separation control is commonly attributed to the near-wall jet described above (Figure 6a). The flow is most receptive to the ac-DBD perturbations when the actuator is placed at or slightly upstream of the separation location (Huang et al 2006, Sosa et al 2007, Jolibois et al 2008). …”

Section: Separation Control With Dbd Plasma Actuatorsmentioning

confidence: 99%

Control of Boundary Layer Separation and the Wake of an Airfoil using ns-DBD Plasma Actuators

Ashcraft

2016

54th AIAA Aerospace Sciences Meeting

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“…Traditionally plasma actuators are energized at voltages of tens of kV [1][2][3]. Such high voltages are hard to insulate and requires a large size power supply.…”

Section: Introductionmentioning

confidence: 99%

“…Such high voltages are hard to insulate and requires a large size power supply. It is known that electrohydrodynamic (EHD) phenomenon occurred through the momentum transfer from ions accelerated by electric field to neutral molecules by collision [1][2][3][4][5][6][7][8][9]. Our study was carried out to investigate a micro scale plasma actuator energized at 1.4 kV [10][11][12][13][14][15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Microplasma actuator for active flow control: Experiment and simulation

Shimizu

Mizuno²,

Ito³

et al. 2016

Proc. 14th Int. Conf. On Global Research and Education, Inter-Academia 2015

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Dielectric Barrier Discharge microplasma actuator energized at low discharge voltage at about 1.4 kV was applied for flow modification. Due to the microplasma generation, the flow velocity showed different characteristics at various duty ratios of the applied voltage. The observation with the high speed camera showed at various time intervals the modification of the flow due to the microplasma. The numerical simulation of the flow was carried out using Suzen model which is assuming that the electric potential of plasma actuator potential can be split in the potential due to the external electric field and potential due to the charge density of plasma.

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Application of an AC barrier discharge actuator to control airflow separation above a NACA 0015 airfoil: Optimization of the actuation location along the chord

Cited by 91 publications

References 12 publications

Active Control of Flow around NACA 0015 Airfoil by Using DBD Plasma Actuator

Active Control of Flow around NACA 0015 Airfoil by Using DBD Plasma Actuator

Control of Boundary Layer Separation and the Wake of an Airfoil using ns-DBD Plasma Actuators

Microplasma actuator for active flow control: Experiment and simulation

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