Numerical investigation of plasma-controlled turbulent jets for mixing enhancement

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Title: Numerical investigation of plasma-controlled turbulent jets for mixing enhancement
Author(s): Laizet, S
Ioannou, V
Item Type: Journal Article
Abstract: Plasma-controlled turbulent jets are investigated by means of Implicit Large–Eddy Simulations at a Reynolds number equal to 460,000 (based on the diameter of the jet and the centreline velocity at the nozzle exit). Eight Dielectric Barrier Discharge (DBD) plasma actuators located just before the nozzle exit are used as an active control device with the aim to enhance the mixing of the jet. Four control configurations are presented in this numerical study as well as a reference case with no control and a tripping case where a random forcing is used to destabilize the nozzle boundary layer. Visualisations of the different cases and time-averaged statistics for the different controlled cases are showing strong modifications of the vortex structures downstream of the nozzle exit, with a substantial reduction of the potential core, an increase of the jet radial expansion and an improvement of the mixing properties of the flow.
Publication Date: 1-Apr-2018
Date of Acceptance: 12-Feb-2018
URI: http://hdl.handle.net/10044/1/56960
DOI: https://dx.doi.org/10.1016/j.ijheatfluidflow.2018.02.008
ISSN: 0142-727X
Publisher: Elsevier
Start Page: 193
End Page: 205
Journal / Book Title: International Journal of Heat and Fluid Flow
Volume: 70
Sponsor/Funder: Engineering & Physical Science Research Council (EPSRC)
Funder's Grant Number: ep/m022676/1
Copyright Statement: © 2018 The Authors. Published by Elsevier Inc. This is an open access article under the CC BY license (http://creativecommons.org/licenses/BY/4.0/
Keywords: 0901 Aerospace Engineering
0913 Mechanical Engineering
0915 Interdisciplinary Engineering
Mechanical Engineering & Transports
Publication Status: Published
Online Publication Date: 2018-03-20
Appears in Collections:Faculty of Engineering
Aeronautics



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