Momentum Transfer for an Aerodynamic Plasma Actuator with an Imposed Boundary Layer

Baughn, J. W.; Porter, Chris; Peterson, Brent M.; McLaughlin, Thomas; Enloe, C. L.; Font, Gabriel; Baird, C A

doi:10.2514/6.2006-168

Cited by 56 publications

(43 citation statements)

References 13 publications

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“…In addition, we neglect the momentum flux into the control volume through the left and top edges, setting terms II and III in equation (1) to zero. Once these assumptions are made, equation (1) simplifies to This final result is equivalent to the calculations by Baughn et al 16 with the background velocity reduced to zero. That study measured the absolute plasma force and so also subtracted a shear force.…”

Section: B Stagnation Probe Measurementsmentioning

confidence: 96%

Force measurements of single and double barrier DBD plasma actuators in quiescent air

Hoskinson¹,

Hershkowitz²,

Ashpis³

2008

J. Phys. D: Appl. Phys.

104

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We have performed measurements of the force induced by both single (one electrode insulated) and double ( both electrodes insulated) dielectric barrier discharge plasma actuators in quiescent air. We have shown that, for single barrier actuators, as the electrode diameter decreased below those values previously studied the induced Force increases exponentially rather than linearly. This behavior has been experimentally verified using two different measurement techniques: stagnation probe measurements of the induced flow velocity and direct measurement of the force using an electronic balance. In addition, we have shown the the induced force is independent of the material used for the exposed electrode. The same techniques have shown that the induced force of a double barrier actuator increases with decreasing narrow electrode diameter.

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Section: B Stagnation Probe Measurementsmentioning

confidence: 96%

Force measurements of single and double barrier DBD plasma actuators in quiescent air

Hoskinson¹,

Hershkowitz²,

Ashpis³

2008

J. Phys. D: Appl. Phys.

104

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show abstract

“…The measurement technique is similar to that used by Pons et al To make comparisons between the stagnation probe and balance measurements, we must convert the measured pressures into forces, and then force efficiencies. The conversion to force follows, and is similar to the analysis performed by Baughn et al 16 To analyze the system, we consider the rectangular control volume of figure 3. The control volume borders the dielectric surface and includes the entire plasma volume.…”

Section: A Stagnation Probe Measurementsmentioning

confidence: 99%

“…An example fit is shown in figure 4. Equation (3) is equivalent to the result of Baughn et al 16 with zero background velocity. That study measured the absolute plasma force and so placed the shear force on the right-hand side of the equation.…”

Section: A Stagnation Probe Measurementsmentioning

confidence: 99%

Comparisons of Force Measurement Methods for DBD Plasma Actuators in Quiescent Air

Hoskinson

Hershkowitz

Ashpis

2009

47th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition

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We have performed measurements of the force induced by both single (one electrode insulated) and double (both electrodes insulated) dielectric barrier discharge plasma actuators in quiescent air. We have shown that, for single barrier actuators with cylindrical exposed electrodes, as the electrode diameter decrease the force efficiencies increase much faster than a previously reported linear trend. This behavior has been experimentally verified using two different measurement techniques: stagnation probe measurements of the induced flow velocity and direct measurement of the force using an electronic balance. Actuators with rectangular cross-section exposed electrodes do not show the same rapid increase at small thicknesses. We have also shown that the induced force is independent of the material used for the exposed electrode. The same techniques have shown that the induced force of a double barrier actuator increases with decreasing narrow electrode diameter.

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“…Introduction T HERE is currently considerable interest in the use of single dielectric barrier discharge (SDBD) plasma actuators for aerodynamic flow control. The diverse applications are too numerous to list here but include, for example, active airfoil leading edge separation control [1,2], control of airfoil dynamic stall [3], bluff body flow control [4][5][6][7][8], boundary layer flow control [9][10][11], highlift applications [12], and turbomachinery flow control [13][14][15], to name just a few. The physics surrounding the operation of SDBD plasma actuators has been the focus of several studies [16][17][18][19] and the mechanism of actuation is now fairly well understood.…”

mentioning

confidence: 99%

Optimization of Dielectric Barrier Discharge Plasma Actuators for Active Aerodynamic Flow Control

et al. 2009

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This paper presents the results of a parametric experimental investigation aimed at optimizing the body force produced by single dielectric barrier discharge plasma actuators used for aerodynamic flow control. A primary goal of the study is the improvement of actuator authority for flow control applications at higher Reynolds number than previously possible. The study examines the effects of dielectric material and thickness, applied voltage amplitude and frequency, voltage waveform, exposed electrode geometry, covered electrode width, and multiple actuator arrays. The metric used to evaluate the performance of the actuator in each case is the measured actuator-induced thrust which is proportional to the total body force. It is demonstrated that actuators constructed with thick dielectric material of low dielectric constant produce a body force that is an order of magnitude larger than that obtained by the Kapton-based actuators used in many previous plasma flow control studies. These actuators allow operation at much higher applied voltages without the formation of discrete streamers which lead to body force saturation.Nomenclature b = electrode serration width E = electric field f = body force Gr = Grashof number h = electrode serration height Re = Reynolds number T = actuator-induced thrust U j = wall jet velocity V pp = peak-to-peak voltage V rms = root-mean-square voltage x = streamwise spatial coordinate y = wall-normal spatial coordinate " = dielectric constant = fluid density c = charge density

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Momentum Transfer for an Aerodynamic Plasma Actuator with an Imposed Boundary Layer

Cited by 56 publications

References 13 publications

Force measurements of single and double barrier DBD plasma actuators in quiescent air

Force measurements of single and double barrier DBD plasma actuators in quiescent air

Comparisons of Force Measurement Methods for DBD Plasma Actuators in Quiescent Air

Optimization of Dielectric Barrier Discharge Plasma Actuators for Active Aerodynamic Flow Control

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