Comparison of the surface dielectric barrier discharge characteristics under different electrode gaps

Gao, Guoqiang; Dong, Lifang; Peng, Kaisheng; Wei, Wenfu; Li, Chunmao; Wu, Guangning

doi:10.1063/1.4974037

Cited by 27 publications

(9 citation statements)

References 13 publications

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“…First, it proves the importance and the potentiality of these devices, whereas second, it states that many issues have not yet been met and further challenges still exist (e.g., energy conversion efficiency factor enhancement). Numerous studies focus on the geometry-configuration optimization [10][11][12], the dielectric barrier specifications [12,13], the material endurance [13,14], the role of the driving voltage characteristics [12,[15][16][17], the boundary layer separation control [18,19], the laminar-to-turbulent transition delay [20], etc., just to name a few.…”

Section: Introductionmentioning

confidence: 99%

SDBD Flexible Plasma Actuator with Ag-Ink Electrodes: Experimental Assessment

et al. 2021

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In the present work, a single dielectric barrier discharge (SDBD)-based actuator is developed and experimentally tested by means of various diagnostic techniques. Flexible dielectric barriers and conductive paint electrodes are used, making the design concept applicable to surfaces of different aerodynamic profiles. A technical drawing of the actuator is given in detail. The plasma is sustained by audio frequency sinusoidal high voltage, while it is probed electrically and optically. The consumed electric power is measured, and the optical emission spectrum is recorded in the ultraviolet–near infrared (UV–NIR) range. High-resolution spectroscopy provides molecular rotational distributions, which are treated appropriately to evaluate the gas temperature. The plasma-induced flow field is spatiotemporally surveyed with pitot-like tube and schlieren imaging. Briefly, the actuator consumes a mean power less than 10 W and shows a fair stability over one day, the average temperature of the gas above its surface is close to 400 K, and the fluid speed rises to 4.5 m s−1. A long, thin layer (less than 1.5 mm) of laminar flow is unveiled on the actuator surface. This thin layer is interfaced with an outspread turbulent flow field, which occupies a centimeter-scale area. Molecular nitrogen-positive ions appear to be part of the charged heavy species in the generated filamentary discharge, which can transfer energy and momentum to the surrounding air molecules.

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Section: Introductionmentioning

confidence: 99%

SDBD Flexible Plasma Actuator with Ag-Ink Electrodes: Experimental Assessment

et al. 2021

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“…Another study [64,65], provided similar results for linear electrodes 8 mm wide under various voltage amplitudes at a fixed frequency of 9.1 kHz. Figures 5E,F shows that power and induced velocity increase gradually with the horizontal separation of the electrodes until they reached a peak or optimal point, but levels of power and velocity drop rapidly if the gap is increased further because the electric field weakens, leading to a fast reduction of plasma and the induced velocity.…”

Section: Optimal Horizontal Gap Between Exposed and Buried Electrodementioning

confidence: 60%

Advances on aerodynamic actuation induced by surface dielectric barrier discharges

2022

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Surface Dielectric Barrier Discharge (SDBD) is a well-known technology for active aerodynamic flow control with low power consumption. It is a type of plasma actuation for flow control with no moving parts and very fast response times. Research on SDBD flow control over the years has shown great potential for flow separation, boundary layer transition, drag reductions and suppression of local heating. A major area of research on SDBD flow control lies in increasing the effectiveness of SDBD actuators with new electrode configurations, surface materials, and plasma array designs. This review aims to provide a comprehensive report of research performed on SDBD flow control over the last 2 decades with a focus on SDBD reactor designs. Aspects of SDBD flow control including discharge morphology and actuation mechanism through momentum and energy transfer have been discussed in depth. Additionally, the future of research in SDBD actuated flow control has been explored. This review can serve as the baseline to develop new SDBD reactor designs for specific applications with improved effectiveness and advanced systems.

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“…The design of an actuator is crucial to the performance of the induced ionic wind. A thick medium, a narrow upper electrode, a wide lower electrode, and a reasonable electrode gap can induce a strong ionic wind for an actuator [31,32]. In this study, the plasma actuator used was composed of two electrodes of the same thickness of 0.06 mm with the electrode gap ∆d of 1mm.…”

Section: Sdbd Plasma Actuatormentioning

confidence: 99%

Separation Flow Control of a Generic Ground Vehicle Using an SDBD Plasma Actuator

Zheng

Guo

et al. 2019

Energies

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Quiescent flow and wind tunnel tests were performed to gain additional physical insights into flow control for automotive aerodynamics using surface dielectric barrier discharge plasma actuators. First, the aerodynamic characteristics of ionic wind were studied, and a maximum induced velocity of 3.3 m/s was achieved at an excitation voltage of 17 kV. Then, the optimal installation position of the actuator and the influence of the excitation voltage on flow control at different wind speeds were studied. The conclusions drawn are as follows. The effect of flow control is better when the upper electrode of the actuator is placed at the end of the top surface, increasing the likelihood of the plasma generation region approaching the natural separation location. The pressure on top of the slanted surface is primarily affected by airflow acceleration at a low excitation voltage and by the decrease of the separation zone at a high excitation voltage. The maximum drag reduction can be realized when the maximum velocity of ionic wind reaches 1.71 m/s at a wind speed of 10 m/s and 2.54 m/s at a wind speed of 15 m/s. Moreover, effective drag reduction can be achieved only by continuing to optimize the actuator to generate considerable thrust at a high wind speed.

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Comparison of the surface dielectric barrier discharge characteristics under different electrode gaps

Cited by 27 publications

References 13 publications

SDBD Flexible Plasma Actuator with Ag-Ink Electrodes: Experimental Assessment

SDBD Flexible Plasma Actuator with Ag-Ink Electrodes: Experimental Assessment

Advances on aerodynamic actuation induced by surface dielectric barrier discharges

Separation Flow Control of a Generic Ground Vehicle Using an SDBD Plasma Actuator

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