Wake Control over a Long Flat Plate with DBD Plasma Actuator and Power Consumption

2018 ◽  
Vol 2018 (0) ◽  
pp. OS5-7
Author(s):  
Yoshifumi JODAI ◽  
Shiro URUSHIHARA
Keyword(s):  
Power Consumption ◽  
Flat Plate ◽  
Plasma Actuator ◽  
Dbd Plasma

On the boundary flow using pulsed nanosecond DBD plasma actuators

2018 ◽  
Vol 32 (12n13) ◽  
pp. 1840035
Author(s):  
Zi-Jie Zhao ◽  
Y. D. Cui ◽  
Jiun-Ming Li ◽  
Jian-Guo Zheng ◽  
B. C. Khoo
Keyword(s):  
Flat Plate ◽  
Stable State ◽  
Single Pulse ◽  
Plasma Actuator ◽  
Plasma Actuators ◽  
Pulsed Plasma ◽  
Dbd Plasma ◽  
Narrow Region ◽  
Layer Flow ◽  
Induced Velocity

Our previous studies in quiescent air environment [Z. J. Zhao et al., AIAA J. 53(5) (2015) 1336; J. G. Zheng et al., Phys. Fluids 26(3) (2014) 036102] reveal experimentally and numerically that the shock wave generated by the nanosecond pulsed plasma is fundamentally a microblast wave. The shock-induced burst perturbations (overpressure and induced velocity) are found to be restricted to a very narrow region (about 1 mm) behind the shock front and last only for a few microseconds. These results indicate that the pulsed nanosecond dielectric barrier discharge (DBD) plasma actuator has stronger local effects in time and spatial domain. In this paper, we further investigate the effects of pulsed plasma on the boundary layer flow over a flat plate. The present investigation reveals that the nanosecond pulsed plasma actuator generates intense perturbations and tends to promote the laminar boundary over a flat plate to turbulent flow. The heat effect after the pulsed plasma discharge was observed in the external flow, lasting a few milliseconds for a single pulse and reaching a quasi-stable state for multi-pulses.

Interaction of a jet flow induced by DBD plasma actuator with a wake behind a normal flat plate

2018 ◽  
Vol 2018.24 (0) ◽  
pp. GS0307
Author(s):  
Shion KAWASAKI ◽  
Kazumi TSUNODA ◽  
Katsuaki SUKEGAWA ◽  
Yoshiaki YAMASHIRO
Keyword(s):  
Flat Plate ◽  
Jet Flow ◽  
Plasma Actuator ◽  
Dbd Plasma

Analysis of Innovative Plasma Actuator Geometries for Boundary Layer Control

2016 ◽  
Author(s):  
F. F. Rodrigues ◽  
J. C. Pascoa ◽  
M. Trancossi
Keyword(s):  
Boundary Layer ◽  
Power Consumption ◽  
Active Flow Control ◽  
Plasma Actuator ◽  
Synthetic Jet ◽  
Plasma Actuators ◽  
Boundary Layer Control ◽  
Dbd Plasma ◽  
Active Flow ◽  
Layer Control

Active flow control by plasma actuators is a topic of great interest by worldwide scientific community. These devices are mainly used for boundary layer control in order to improve the aerodynamic performance of aerial vehicles. Plasma actuators are simple devices that produces a wall bounded jet which allow to control the adjacent flow without moving mechanical parts. Recently, new geometries have been proposed by different authors in an attempt to improve the performance of these devices. In this work, some of these new configurations will be studied and compared considering its ability for boundary layer control applications. Dielectric Barrier Discharge (DBD) plasma actuator, Plasma Synthetic Jet (PSJ) actuator, Multiple Encapsulated Electrodes (MEE) plasma actuator and Curved plasma actuator (or 3D plasma actuator) will be experimentally studied in this work. Plasma actuators power consumption was measured by two different experimental methods. Results for power consumption and power losses of different plasma actuators geometries were presented and discussed.

Vortex control around a flat plate of finite width using DBD plasma actuator

2020 ◽  
Vol 2020 (0) ◽  
pp. 16B08
Author(s):  
Katsuaki SUKEGAWA ◽  
Daiki KASAHARA ◽  
Tsukasa SUGIYAMA ◽  
Kazumi TSUNODA
Keyword(s):  
Flat Plate ◽  
Plasma Actuator ◽  
Finite Width ◽  
Dbd Plasma ◽  
Vortex Control

Effect of plasma actuator in boundary layer on flat plate model with turbulent promoter

2017 ◽  
Vol 232 (16) ◽  
pp. 3001-3010
Author(s):  
James Julian ◽  
Harinaldi ◽  
Budiarso ◽  
Chin-Cheng Wang ◽  
Ming-Jyh Chern
Keyword(s):  
Boundary Layer ◽  
Flat Plate ◽  
Aerodynamic Drag ◽  
Active Flow Control ◽  
Adverse Pressure Gradient ◽  
Plasma Actuator ◽  
Experimental Results ◽  
Plate Model ◽  
Displacement Thickness ◽  
Turbulent Promoter

This paper shows experimental results for velocity measurement in the boundary layer with the use of a flat plate model. The flat plate model is disrupted with a wire trip and the effect of the plasma actuator to alter the flow in the boundary layer is then observed. The purpose of this research is to characterize the performance of the plasma actuator in a no-flow condition and with the use of a 2 m/s flow and also to theoretically analyze the performance of actuator in the boundary layer namely, displacement thickness, momentum thickness, and energy thickness. This is all done to acquire a deeper understanding of the capabilities of plasma actuator as one of the alternative active flow control equipment and to increase the effect of aerodynamic drag reduction. One of the ways to decrease the aerodynamic drag is to manipulate the flow to have a low boundary layer thickness value in order to prevent an adverse pressure gradient from happening, which then may lead to the formation of a flow separation. From experimental results, it is known that plasma actuator could decrease the thickness of the boundary layer by 9 mm.

scholarly journals Surface velocity model of the flow caused by a DBD plasma actuator

2019 ◽  
Vol 85 (869) ◽  
pp. 18-00368-18-00368 ◽  
Author(s):  
Keunseob LEE ◽  
Satoshi KIKUCHI ◽  
Shigeki IMAO
Keyword(s):  
Velocity Model ◽  
Plasma Actuator ◽  
Surface Velocity ◽  
Dbd Plasma

Wall Normal Jet Produced by DBD Plasma Actuator With Doughnut-Shaped Electrode

2008 ◽  
Author(s):  
Takehiko Segawa ◽  
Hiro Yoshida ◽  
Shinya Takekawa ◽  
Timothy Jukes ◽  
Kwing-So Choi
Keyword(s):  
Atmospheric Pressure ◽  
Room Temperature ◽  
Particle Image ◽  
Barrier Discharge ◽  
Plasma Actuator ◽  
Dbd Plasma ◽  
Annular Jet ◽  
Image Velocimetry ◽  
Inner Diameter ◽  
Annular Jets

Properties of coaxial annular jets produced by a dielectric barrier discharge (DBD) plasma actuator with a doughnut shaped electrodes were investigated under atmospheric pressure and room temperature. The actuator consists of two circular electrodes sandwiching a thin dielectric layer. By applying 0 – ±3.3 kV between the electrodes at radio frequencies, the plasma jet is formed near the inner edge of the top electrode. The radial jet runs toward the center of the electrode and then impinges at the center to generate a wall normal annular jet. The evolution of the wall normal jet was observed precisely using particle image velocimetry (PIV) system. It was found that characteristic velocities increase in proportion to the bursting frequency and inversely proportional to the inner diameter of the electrode at the surging time of the voltage at 5.0 × 10−6sec.

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