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doi:10.1146/fluid.2010.42.issue-1

Cited by 7 publications

(2 citation statements)

References 12 publications

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“…The dielectric barrier discharge (DBD) plasma actuator, a new type of active flow control device, has received wide international attention because of its simple structure, fast response, light weight and ease of installation on the surface of the controlled object. [1][2][3] A conventional DBD mainly comprises two metal electrodes and an insulating dielectric layer (see Fig. 1(a)), with exposed electrode #1 attached to the upper surface of the dielectric layer and buried electrode #2 covered below the dielectric layer.…”

Section: Introductionmentioning

confidence: 99%

Flow control performance evaluation of a tri-electrode sliding discharge plasma actuator

Zheng

LIU

et al. 2023

Chinese Phys. B

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Tri-electrode sliding discharge (TED) plasma actuators are formed by adding a direct current (DC) exposed electrode to conventional dielectric barrier discharge (DBD) plasma actuators. TED has three discharge modes depending on the polarity and amplitude of the DC supply: DBD discharge, extended discharge, and sliding discharge. This paper evaluates the plasma actuator's electrical, aerodynamic, and mechanical characteristics based on energy analysis, particle image velocimetry (PIV) experiments, and N-S equations calculation. The flow control performances of different discharge modes are quantitatively analyzed based on characteristic parameters. The results show that flow control performances in both extended discharge and sliding discharge are more significant than that of DBD, mainly because of the significantly higher body force of TED compared to DBD, which is up to 141%. However, conductivity loss is the primary power loss caused by the DC polar for TED discharge. Therefore, power consumption can be reduced by optimizing the dielectric material and thickness, thus improving the flow control performance of plasma actuators.

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Section: Introductionmentioning

confidence: 99%

Flow control performance evaluation of a tri-electrode sliding discharge plasma actuator

Zheng

LIU

et al. 2023

Chinese Phys. B

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“…Turbulent Rayleigh-Bénard convection (RBC), a closed fluid layer thermostatically heated from the bottom and cooled from the top, has chronically been used to study thermally-driven turbulence. [1][2][3][4] The enclosed working fluid forms convective motion through the buoyancy force produced by the temperature difference between the bottom and the top plates of a convection cell of height H.…”

Section: Introductionmentioning

confidence: 99%

Characteristics of temperature fluctuation in two-dimensional turbulent Rayleigh-Bénard convection

Fang¹,

He²,

Hu³

et al. 2022

Chinese Phys. B

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We study the characteristics of temperature fluctuation in two-dimensional turbulent Rayleigh-Bénard convection in a suqare cavity by means of direct numerical simulations. The Rayleigh number range is 1×108 ≤ Ra ≤ 1×1013, and the Prandtl number is selected as Pr=0.7 and Pr=4.3. It is found that, the temperature fluctuation profiles with respect to Ra exhibit two different distribution patterns. In the thermal boundary layer, the normalized fluctuation θ rms /θ rms,max is independent on Ra and a power law relation is identified, i.e., θ rms /θ rms,max ~(z/δ)0.99±0.01, where z/δ is a dimensionless distance to the boundary (δ is the thickness of thermal boundary layer). Out of the boundary layer, when Ra ≤ 5×109, the profiles of θ rms /θ rms,max descend, then ascend, and finally drop dramatically as z/δ increases. While for Ra ≥ 1×1010, the profiles continuously decrease and finally overlap with each other. The two different characteristics of temperature fluctuations are closely related to the formation of stable large-scale circulations and corner rolls. Besides, there is a critical value of Ra indicating the transition, beyond which the fluctuation <θ rms > V has a power law dependence on Ra, given by <θ rms > V ~Ra -0.14±0.01.

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