Effects of AC Dielectric Barrier Discharge Plasma Actuator Location on Flow Separation and Airfoil Performance

Bouremel, Yann; Li, Jiun-Ming; Zhao, Zijie; Debiasi, Marco

doi:10.1016/j.proeng.2013.12.026

Cited by 22 publications

(15 citation statements)

References 4 publications

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“…shadowgraphy and ICCD imaging can also be used to determine the energy dissipation processes in a plasma jet's effluent [250]. Finally, in order to determine the flow field with the velocity vectors, particle imaging velocimetry (PIV) has been employed [251].…”

Section: Flow Visualizationmentioning

confidence: 99%

Reactive species in non-equilibrium atmospheric-pressure plasmas: Generation, transport, and biological effects

et al. 2016

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Non-equilibrium atmospheric-pressure plasmas have recently become a topical area of research owing to their diverse applications in health care and medicine, environmental remediation and pollution control, materials processing, electrochemistry, nanotechnology and other fields. This review focuses on the reactive electrons and ionic, atomic, molecular, and radical species that are produced in these plasmas and then transported from the point of generation to the point of interaction with the material, medium, living cells or tissues being processed. The most important mechanisms of generation and transport of the key species in the plasmas of atmospheric-pressure plasma jets and other non-equilibrium atmosphericpressure plasmas are introduced and examined from the viewpoint of their applications in plasma hygiene and medicine and other relevant fields. Sophisticated high-precision, timeresolved plasma diagnostics approaches and techniques are presented and their applications to monitor the reactive species and plasma dynamics in the plasma jets and other discharges, both in the gas phase and during the plasma interaction with liquid media, are critically reviewed. The large amount of experimental data is supported by the theoretical models of reactive species generation and transport in the plasmas, surrounding gaseous environments, and plasma interaction with liquid media. These models are presented and their limitations are discussed. Special attention is paid to biological effects of the plasma-generated reactive oxygen and nitrogen (and some other) species in basic biological processes such as cell metabolism, proliferation, survival, etc. as well as plasma applications in bacterial inactivation, wound healing, cancer treatment and some others. Challenges and opportunities for theoretical and experimental research are discussed and the authors' vision for the emerging convergence trends across several disciplines and application domains are presented to stimulate critical discussions and collaborations in the future. 4 3.5 Optical absorption spectroscopy 3.5.1 Ozone 3.5.2 UV broadband absorption of OH density 3.5.3 Cavity ring-down spectroscopy 3.5 Selected non-optical techniques 3.5.1 Mass spectrometry 3.5.2 Flow visualization 3.5.3 Electron paramagnetic resonance spectroscopy 4. Temporal and spatial behaviour of key reactive species 4.1 Electron density (n e) 4.2 O atoms 4.2.1 Effect of admixture of O 2 /air on O concentration 4.2.2 Diffusion effect of shielding gas on O production 4.3 OH radical 4.3.1 Effect of H 2 O admixture on OH concentration 4.3.2 Effect of gas flow on OH concentration 4.3.3 Effect of O 2 on OH production 4.3.4 Effect of the treated samples on OH concentration 4.3.4.1 Effect of humidity of treatment sample on OH distribution 4.3.4.2 Effect of sample conductivity on OH distribution 4.3.4.3. Effect of the amplitude of the applied voltage on OH distribution 4.3.4.4. The effect of gas flow on OH distribution 4.3.4.5. The effect of the surface characteristics on OH distribution 4.3.5 Effe...

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Section: Flow Visualizationmentioning

confidence: 99%

Reactive species in non-equilibrium atmospheric-pressure plasmas: Generation, transport, and biological effects

et al. 2016

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“…In practice, in the regions far from the actuator, the free stream air velocity damps the induced momentum leaving virtually no effect from the induced momentum. Because of this reason, the plasma actuators are known as post-stall actuators (Sato et al 2013;Jolibois et al 2008;Bouremel et al 2013).…”

Section: Results and Discussion Stationary Actuationmentioning

confidence: 99%

“…Their experiment is carried out for Re=0.53×10 5 and α=12º, 14º and 16º. In a more recent study, Bouremel et al (2013) studied the effect of DBD actuator location on the flow separation and performance of NACA4415 airfoil. They conducted experiments at Re=0.35×10 5 for angles of attack in the range of -6° to 16°.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of Separation Control on a NACA0024 Airfoil using Stationary and Non-Stationary AC-Dielectric Barrier Discharge Plasma Actuator

Tathiri

Parishani²,

Pouryoussefi³

et al. 2016

JAFM

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An experimental study of stationary and non-stationary dielectric barrier discharge (DBD) plasma actuator is presented to control the flow around a NACA0024 airfoil. First, an induced air velocity of ~5 m/s is generated on a flat plate in still air using an AC-DBD actuator to find the optimal setup of the actuator (voltage, frequency, electrode width and gap size). Using the same actuator in the optimal position/setup on a NACA0024 airfoil at Reynolds number of 0.48×10 6 , we are able to increase the stall angle of the airfoil to 18º, compared to 16º in no-actuator state. Furthermore, during the plasma actuation, the lift is increased by up to 5%. We show that non-stationary actuation, while yielding a performance similar to stationary actuation, leads to a considerable reduction of ~51% in plasma power consumption.

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“…The effect of this plasma device in the recovery of stall condition is depicted in Figure 13, where smoke visualization is reported. Experiments show how the most effective actuator is the one positioned on the airfoil leading edge, just before the region where separation occurs [66,67,79,80]. Active Flow Control by Using Plasma Actuators http://dx.doi.org/10.5772/62720 Figure 13.…”

Section: Dbd Aerodynamic Actuators: Flow Manipulationmentioning

confidence: 99%

Active Flow Control by Using Plasma Actuators

Neretti¹

2016

Recent Progress in Some Aircraft Technologies

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Active flow control has recently received an increasing attention since it allows to directly manipulate the flow-field around a surface only when it is effectively requested. Aerodynamic plasma actuators supplied by a dielectric barrier discharge (DBD) can be used for this purpose. Usually, sinusoidal voltages in the range 5-50 kV peak and frequencies between 1 and 100 kHz are utilized to ignite this plasma typology. The surface discharge produced by these devices is able to tangentially accelerate the flow field by means of the electrohydrodynamic (EHD) interaction. DBDs generate non-thermal plasmas characterized by low input energies and limited temperature increments. Plasma actuators can be easily designed by following the shape of the aerodynamic body and can be used over heat-sensitive surfaces. These aerodynamic devices have demonstrated to produce boundary layer modifications with induced speeds up to 10 m/s. Their use over airfoils, flaps, and blades have shown the possibility to delay the transition between laminar to turbulent regime, to prevent flow separation enhancing lift and reducing drag. Moreover, the adoption of these actuators over landing gears and trailing edges may induce a noise reduction effect. Dielectric materials, electrodes configuration, and supplying waveforms are most relevant parameters to be considered to enhance actuator performance. On a parallel plane, on/off actuation strategy is a key point in the use of these devices when utilized over aerodynamic surfaces impinged within an external flow.

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Effects of AC Dielectric Barrier Discharge Plasma Actuator Location on Flow Separation and Airfoil Performance

Cited by 22 publications

References 4 publications

Reactive species in non-equilibrium atmospheric-pressure plasmas: Generation, transport, and biological effects

Reactive species in non-equilibrium atmospheric-pressure plasmas: Generation, transport, and biological effects

Experimental Investigation of Separation Control on a NACA0024 Airfoil using Stationary and Non-Stationary AC-Dielectric Barrier Discharge Plasma Actuator

Active Flow Control by Using Plasma Actuators

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