Burst-Mode Frequency Effects of Dielectric Barrier Discharge Plasma Actuator for Separation Control

Sekimoto, Satoshi; Nonomura, Taku; Fujii, Kozo

doi:10.2514/1.j054678

Cited by 76 publications

(41 citation statements)

References 37 publications

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“…Therefore, 14 • , which is a few degrees above the stall angle, was selected for the main case for the discussion below. Experiments were also conducted at this angle of attack with higher voltages (5.0 kV-6.0 kV (Vpp)) [38]. Figure 6 shows plots of surface…”

Section: Use Of Burst Waves: Observations In Our Early Studymentioning

confidence: 99%

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Three Flow Features behind the Flow Control Authority of DBD Plasma Actuator: Result of High-Fidelity Simulations and the Related Experiments

Fujii

2018

Applied Sciences

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Both computational and experimental studies are conducted for understanding of the flow separation control mechanism of a DBD (dielectric barrier discharge) plasma actuator. Low speed flows over an airfoil are considered. A DBD plasma actuator is attached near the leading edge of an airfoil and the mechanism of flow control of this small device is discussed. The DBD plasma actuator, especially in burst mode, is shown to be very effective for controlling flow separation at Reynolds number of 6.3 × 10 4 , when applied to the flows at an angle of attack higher than the stall. The analysis reveals that the flow structure includes three remarkable features that provide good authority for flow separation control with the appropriate actuator parameters. With proper setting of the actuator parameters to enhance the effective flow features for the application, good flow control can be achieved. Based on the analysis, guidelines for the effective use of DBD plasma actuators are proposed. A DBD plasma actuator is also applied to the flows under cruise conditions. With the DBD plasma actuator attached, a simple airfoil turns out to show higher lift-to-drag ratio than a well-designed airfoil.

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Section: Use Of Burst Waves: Observations In Our Early Studymentioning

confidence: 99%

“…They were also experimentally observed. Figure 10a-d shows an instantaneous snapshot of the PIV particle images in several cases [38]. Figure 11a,b shows two image shots of the computed flow fields obtained with the ensemble and moving average [27,40].…”

Section: Three Important Flow Features and The Guidelines From The Obmentioning

confidence: 99%

Three Flow Features behind the Flow Control Authority of DBD Plasma Actuator: Result of High-Fidelity Simulations and the Related Experiments

Fujii

2018

Applied Sciences

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“…An ac-DBDPA can generate wall jet flow, also called induced flow, and the momentum of the induced flow can be controlled by changing the voltage amplitude and driving frequency. Moreover, unsteady actuation of an ac-DBDPA provides a better control effect than steady actuation [11,12]. Therefore, experiments applying an ac-DBDPA to dynamic stall flow were conducted [13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Dynamic Stall Control around Practical Airfoil Using Nanosecond-Pulse-Driven Dielectric Barrier Discharge Plasma Actuators

et al. 2020

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The flow control effects of a nanosecond-pulse-driven dielectric barrier discharge plasma actuator (ns-DBDPA) in dynamic stall flow were experimentally investigated. The ns-DBDPA was installed on the leading edge of an airfoil model designed in the form of a helicopter blade. The model was oscillated periodically around 25% of the chord length. Aerodynamic coefficients were calculated using the pressure distribution, which was obtained by the measurement of the unsteady pressure by sensors inside the model. The flow control effect and its sensitivity to pitching oscillation and ns-DBDPA control parameters are discussed using the aerodynamic coefficients. The freestream velocity, the mean of the angle of attack, and the reduced frequency were employed as the oscillation parameters. Moreover, the nondimensional frequency of the pulse voltage, the peak pulse voltage, and the type and position of the ns-DBDPA were adopted as the control parameters. The result shows that the ns-DBDPA can decrease the hysteresis of the aerodynamic coefficients and a flow control effect is obtained in all cases. The flow control effect can be maximized by adopting the low nondimensional frequency of the pulse voltage.

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“…Visbal et al [26] numerically showed that unsteady plasma forcing provides better flow separation control than a steady forcing. Similar work on separation control was recently performed experimentally [27], providing the importance of frequency of actuation. Bénard et al [28] studied a wide range of frequencies to demonstrate its impact on a fully turbulent boundary layer.…”

Section: Introductionmentioning

confidence: 61%

Effect of plasma actuator control parameters on a transitional flow

Gupta¹,

Roy²

2018

J. Phys. D: Appl. Phys.

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This study uses a wall-resolved implicit large eddy simulation to investigate the effects of different surface dielectric barrier discharge actuator parameters such as the geometry of the electrodes, frequency, amplitude of actuation and thermal effect. The actuator is used as a tripping device on a zero-pressure gradient laminar boundary layer flow. It is shown that the standard linear actuator creates structures like the Tollmien-Schlichting wave transition. The circular serpentine, square serpentine and spanwise actuators have subharmonic sinuous streak breakdown and behave like oblique wave transition scenario. The spanwise and square actuators cause comparably faster transition to turbulence. The square actuator adds energy into the higher spanwise wavenumber modes resulting in a faster transition compared to the circular actuator. When the Strouhal number of actuation is varied, the transition does not occur for a value below 0.292. Higher frequencies with same amplitude of actuation lead to faster transition. Small changes (<4%) in the amplitude of actuation can have a significant impact on the transition location which suggests that an optimal combination of frequency and amplitude exists for highest control authority. The thermal bumps approximating the actuator heating only shows localized effects on the later stages of transition for temperatures up to 373 K and can be ignored for standard actuators operating in subsonic regimes.

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Burst-Mode Frequency Effects of Dielectric Barrier Discharge Plasma Actuator for Separation Control

Cited by 76 publications

References 37 publications

Three Flow Features behind the Flow Control Authority of DBD Plasma Actuator: Result of High-Fidelity Simulations and the Related Experiments

Three Flow Features behind the Flow Control Authority of DBD Plasma Actuator: Result of High-Fidelity Simulations and the Related Experiments

Dynamic Stall Control around Practical Airfoil Using Nanosecond-Pulse-Driven Dielectric Barrier Discharge Plasma Actuators

Effect of plasma actuator control parameters on a transitional flow

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