S054051 Jet Flow Diffusion Control by DBD Plasma Actuator

This study investigated the use of a coaxial dielectric barrier discharge plasma actuator (DBD-PA) at a nozzle exit for jet diffusion control. In order to achieve enhanced mixing of the primary jet flow, the influence of the input voltage and frequency to the plasma actuator was examined. In the case of continuous operating, the secondary flow by the induced flow using coaxial plasma actuator is able to adjust the velocity gradient of the free shear layer near the jet nozzle. Intermittent control using the plasma actuator was also attempted by varying the intermittency frequency and the duty ratio. Based on the results of a PIV analysis, the optimum conditions for jet diffusion control were found to be an intermittency frequency that matched the preferred frequency and a duty ratio at 50%.

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

The Proceedings of Conference of Kanto Branch ◽

10.1299/jsmekanto.2018.24.gs0307 ◽

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

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Study of Diffusion Control of Circular Jet Using Concentric DBD Plasma Actuator (Influence on Jet Diffusion of Momentum Added by Induced Flow)

TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series B ◽

10.1299/kikaib.79.2704 ◽

2013 ◽

Vol 79 (808) ◽

pp. 2704-2715 ◽

Cited By ~ 3

Author(s):

Norimasa MIYAGI ◽

Masumi OHNISHI ◽

Jun ASAKURA ◽

Kentarou SAYOU ◽

Motoaki KIMURA

Keyword(s):

Plasma Actuator ◽

Diffusion Control ◽

Dbd Plasma ◽

Induced Flow

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Plasma Actuators for Boundary Layer Control of Next Generation Nozzles

Volume 1: Advances in Aerospace Technology ◽

10.1115/imece2015-52193 ◽

2015 ◽

Cited By ~ 2

Author(s):

F. Rodrigues ◽

José C. Páscoa ◽

F. Dias ◽

M. Abdollahzadeh

Keyword(s):

Boundary Layer ◽

Dielectric Layer ◽

Jet Flow ◽

Plasma Actuator ◽

Plasma Actuators ◽

Boundary Layer Control ◽

Next Generation ◽

Dbd Plasma ◽

Ionized Air ◽

Layer Control

DBD plasma actuators are simple devices comprising two electrodes separated by a dielectric layer. One of the electrodes is covered by the dielectric layer and is completely insulated from the other one, which is exposed to the atmosphere in the top of the dielectric layer. The DBD plasma actuator operates by applying to the two electrodes an high voltage at high frequency from a power supply. When the amplitude of the applied voltage is large enough, in the exposed electrode, an ionization of the air (plasma) occurs over the dielectric surface which, in the presence of the electric field gradient, produces a body force on the ionized air particles. This induces a flow that draws ionized air along the surface of the actuator and it accelerates this neutral air towards downstream, in a direction tangential to the dielectric. Herein we will present this next generation plasma actuator for boundary layer control, which is demonstrated on the acceleration of the flow in a Coanda nozzle wall, thus contributing to help vectoring the exit jet flow. It will be shown that using only the plasma actuator it will be possible to vectorize the exit jet flow even under pure axial flow at the nozzle exit. Experimental results are obtained using flow visualization and Particle Image Velocimetry.

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