Effect of a DC corona electrical discharge on the airflow along a flat plate

Léger, Luc; Moreau, E.; Touchard, G.

doi:10.1109/tia.2002.804769

Cited by 106 publications

(52 citation statements)

References 14 publications

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“…The main drawback of BED plasma actuators is that the electrical discharge becomes unstable under certain atmospheric conditions. For instance, corona-to-arc transition have been detected in some cases when the relative air humidity exceeded a threshold of about 55% [19].…”

Section: Manuscript Received On 3 April 2008 In Final Formmentioning

confidence: 99%

Study of the flow induced by a sliding discharge

Sosa

Arnaud

Mémin

et al. 2009

IEEE Trans. Dielect. Electr. Insul.

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In this work, we report on electrical and fluid-dynamics studies concerning the flow induced by a sliding discharge (SD). This kind of discharge was created with a three electrode system configuration: one excited with ac and the others with a dc negative voltage. The SD was activated on a quiescent fluid at atmospheric pressure. The flow field induced by the SD was analysed by measurements undertaken with Pitot probes and Schlieren Image Velocimetry. Under the conditions of our experiments two "jet flows", that blown towards the interelectrode space, were induced from the air exposed electrodes. As a consequence of the mutual interaction of these two flows and of the magnitude of each flow, a resulting plume like planar jet of adjustable direction (0-180º) could be formed. A robust control of the axis direction of the plume could be achieved by modifying the ac voltage value.

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Section: Manuscript Received On 3 April 2008 In Final Formmentioning

confidence: 99%

Study of the flow induced by a sliding discharge

Sosa

Arnaud

Mémin

et al. 2009

IEEE Trans. Dielect. Electr. Insul.

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“…Both dc corona and glow discharges [18][19][20][21] and ac dielectric barrier discharges [22][23][24][25][26] have been experimentally demonstrated to generate a flow or modify an external, bulk flow. The authors have previously studied macroscale planar configurations for heat transfer enhancement in the presence of an external bulk flow and reported over a 200% increase in the local heat transfer coefficient using a dc corona discharge and electrode gaps of 3-5 mm [27,28].…”

Section: Introductionmentioning

confidence: 99%

Direct simulation of ionization and ion transport for planar microscale ion generation devices

Fisher²,

Garimella³

2009

J. Phys. D: Appl. Phys.

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The theoretical performance of a planar microscale ion generation device is analyzed using the direct simulation Monte Carlo (DSMC) technique. The discrete motion and interactions of electrons and ions are modeled for atmospheric air as represented by N 2 and O 2 . The ionization threshold of the device in air is found to be 70 V because of the effects of molecular excitations that reduce the energy of the free electrons and the nature of the collision cross-sections. Additionally, microscale planar ionization devices are revealed to be inherently inefficient because of the loss of electrons and ions to the dielectric boundary. A multiscale simulation of the electrohydrodynamics is also conducted by extracting the ion-neutral interactions from the DSMC calculations and integrating them into a continuum-scale fluid dynamics model. The multiscale simulations show that the ion-neutral body force distribution for the planar devices is concentrated on the face of the cathode and therefore limits the impact of the force on the flow. A scale analysis confirms that the body force distribution is insufficient to induce high flow rates at this scale.

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“…His work was complemented by the numerical studies of El-Khabiry and Colver. 16 Recently Léger et al 17 and Kimmel et al 18 investigated and demonstrated the ability of corona discharges to reduce drag using electrodes perpendicular to the flow and either flush or in contact with a flat plate.…”

Section: Introductionmentioning

confidence: 99%

Ionic winds for locally enhanced cooling

Garimella

Fisher

et al. 2007

Journal of Applied Physics

156

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Ionic wind engines can be integrated onto surfaces to provide enhanced local cooling. Air ions generated by field-emitted electrons or a corona discharge are pulled by an electric field and exchange momentum with neutral air molecules, causing air flow. In the presence of a bulk flow, ionic winds distort the boundary layer, increasing heat transfer from the wall. Experiments demonstrate the ability of ionic winds to decrease the wall temperature substantially in the presence of a bulk flow over a flat plate, corresponding to local enhancement of the heat transfer coefficient by more than twofold. Multiphysics simulations of the corona and flow describe the ability of the ionic wind to distort a bulk flow boundary layer and confirm the experimentally observed heat transfer enhancement trends.

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Effect of a DC corona electrical discharge on the airflow along a flat plate

Cited by 106 publications

References 14 publications

Study of the flow induced by a sliding discharge

Study of the flow induced by a sliding discharge

Direct simulation of ionization and ion transport for planar microscale ion generation devices

Ionic winds for locally enhanced cooling

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