Dielectric Barrier Discharge Plasma Actuators for In-Flight Transition Delay

Duchmann, Alexander; Simon, Bernhard; Tropea, Cameron; Grundmann, Sven

doi:10.2514/1.j052485

Cited by 49 publications

(17 citation statements)

References 31 publications

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“…Grundmann and Tropea 22 applied plasma actuators on a flat-plate boundary layer with an adverse pressure gradient and successfully delayed transition in experiment. Duchmann et al 23 employed the same method to control the flow on the pressure side of a natural laminar flow wing section under free-flight conditions. Jukes and Choi 24 applied a spanwise oscillation in the near-wall region of a turbulent boundary layer using RF glow discharge surface plasma to reduce skin-friction drag.…”

Section: Introductionmentioning

confidence: 97%

Sensitivity analysis of crossflow boundary layer and transition delay using plasma actuator

Wang

2016

8th AIAA Flow Control Conference

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Sensitivity analysis of boundary layers, which are subjected to the crossflow instability, to dielectric barrier discharge (DBD) plasma actuators is performed in this paper.Following the suggestions given by the sensitivity analysis, we propose a transition control method and use nonlinear parabolized stability equations to provide a computational assessment of the potential use of this method. Numerical study of crossflow wave in swept Hiemenz flow shows that plasma actuators which are posited just beneath the corssflow vortices reduce the growth rate of primary instability disturbance and weaken the crossflow vortices. Three operating voltages of plasma actuators are tested and the moderate voltage performs best. This control approach works better in infinity swept wing flow and decreases the energy of disturbance nearly two orders of magnitude. The result demonstrates that plasma control offers great potential for transition delay.

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Section: Introductionmentioning

confidence: 97%

Sensitivity analysis of crossflow boundary layer and transition delay using plasma actuator

Wang

2016

8th AIAA Flow Control Conference

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“…15,16 Several studies demonstrated the flow control capabilities of these devices. 17,18,19,20 Different attempts were done to control fixed-point separation over a backward facing step using plasma actuators. 21,22,23,24 They all did not achieve a remarkable effect in terms of reattachment length after the step.…”

Section: Introductionmentioning

confidence: 99%

Flow control over a backward facing step by ns-DBD plasma actuator

Correale

2015

45th AIAA Fluid Dynamics Conference

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An experimental investigation on active flow control by a ns-DBD plasma actuator on a laminar shear layer generated at the verge of a backward facing step is reported. Reynolds number based on the step height was about 3600. Time resolved particle image velocimetry (tr-PIV) was employed at an acquisition frequency of 2kHz. The goal of this work was to gain insight about the frequency effect that determines the control authority reported in literature for this kind of plasma actuator. Therefore, frequency was the only parameter investigated, and the forcing frequency ranged between 20 and 200Hz. Ensemble averaged vector field results shown that the reattachment length after the step decreased by increasing the actuation frequency, reaching a minimum at a frequency of 160Hz. Above this frequency, up to 200Hz, the reattachment length increased again albeit remaining shorter than the non-actuated case. Fast Fourier Transform (FFT) analysis and Linear Stability Theory (LST) revealed a change into the stability of the controlled flow with respect to the stability of the base flow cause by the actuation. Proper Orthogonal Decomposition (POD) shown an effect of energy redistribution among modes induced by ns-DBD plasma actuator indicating a change of flow structures dominating the flow evolution, i.e. affecting laminar to turbulent transition. Because of viscous-inviscid flow interactions, according to the forcing frequency, different modes determine different flow structures that dominate the flow evolution, thus changing the overall stability of the controlled flow. Such phenomenon ultimately affects efficiency of transition from laminar to turbulent i.e. affecting the flow control authority of ns-DBDs, explaining the frequency effect reported in literature.

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“…It can be switched off when control is not needed, and thus has the advantage of being adaptive to the flow condition. Its application can be widely found in separation suppression, boundary layer transition, shock stabilization, shock position shifting, drag reduction, and many others.…”

Section: Introductionmentioning

confidence: 99%

Influence of ambient pressure on the performance of an arc discharge plasma actuator

Tian

Jin

Guo

et al. 2018

Contributions to Plasma Physics

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The arc discharge plasma actuator (ADPA) has wide application prospects in high-speed flow control because of its local heating effect and strong disturbance. In this paper, the influence of ambient pressure, which ranges from 3 to 20 kPa, on the performance of a two-electrode ADPA is investigated by a schlieren system. The duration of the arc heated region, as well as its area, is extracted by image processing. As the ambient pressure increases, different flow field evolutions occur. The duration of the ADPA heated region increases with the ambient pressure. The maximum duration reaches 1185.3 μs at 20 kPa. The velocity of the discharge-induced blast shock wave first decreases gradually and then remains at 345 m/s for all air pressures. The blast shock wave has a higher velocity at lower pressures when it is freshly produced. A maximum blast shock wave velocity of 582 m/s is observed at the pressure of 7 kPa. The arc heated region is not sensitive to ambient pressure, but the deposited energy from the arc increases when the pressure increases. KEYWORDS ambient pressure, arc discharge plasma actuator, performance, schlieren method 1

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Dielectric Barrier Discharge Plasma Actuators for In-Flight Transition Delay

Cited by 49 publications

References 31 publications

Sensitivity analysis of crossflow boundary layer and transition delay using plasma actuator

Sensitivity analysis of crossflow boundary layer and transition delay using plasma actuator

Flow control over a backward facing step by ns-DBD plasma actuator

Influence of ambient pressure on the performance of an arc discharge plasma actuator

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