TY - GEN
T1 - Active Control of Turbulent Convective Heat Transfer with Plasma Actuators
AU - Castellanos, Rodrigo
AU - Michelis, Theodoros
AU - Discetti, Stefano
AU - Ianiro, Andrea
AU - Kotsonis, Marios
PY - 2021
Y1 - 2021
N2 - We study an array of streamwise-oriented Dielectric Barrier Discharge (DBD) plasma actuators as an active control technique in turbulent flows. The analysis aims at elucidating the mechanism of interaction between the structures induced by the DBD-plasma actuators and the convective heat transfer process in a fully developed turbulent boundary layer. The employed flush-mounted DBD-plasma actuator array generates pairs of counter-rotating, stationary, streamwise vortices. The full three-dimensional, velocity field is measured with stereoscopic PIV and convective heat transfer at the wall is assessed by infrared thermography. The plasma actuator forcing diverts the main flow, yielding a low-momentum region that grows in the streamwise direction. The suction effect promoted on top of the exposed electrodes confines the vortices in the spanwise direction. Eventually, the pair of streamwise vortices locally reduces the convective heat transfer with a persistence of several outer lengthscales downstream of the actuation.
AB - We study an array of streamwise-oriented Dielectric Barrier Discharge (DBD) plasma actuators as an active control technique in turbulent flows. The analysis aims at elucidating the mechanism of interaction between the structures induced by the DBD-plasma actuators and the convective heat transfer process in a fully developed turbulent boundary layer. The employed flush-mounted DBD-plasma actuator array generates pairs of counter-rotating, stationary, streamwise vortices. The full three-dimensional, velocity field is measured with stereoscopic PIV and convective heat transfer at the wall is assessed by infrared thermography. The plasma actuator forcing diverts the main flow, yielding a low-momentum region that grows in the streamwise direction. The suction effect promoted on top of the exposed electrodes confines the vortices in the spanwise direction. Eventually, the pair of streamwise vortices locally reduces the convective heat transfer with a persistence of several outer lengthscales downstream of the actuation.
UR - http://www.scopus.com/inward/record.url?scp=85119006688&partnerID=8YFLogxK
U2 - 10.1007/978-3-030-80716-0_3
DO - 10.1007/978-3-030-80716-0_3
M3 - Conference contribution
AN - SCOPUS:85119006688
SN - 9783030807153
T3 - Springer Proceedings in Physics
SP - 21
EP - 27
BT - Progress in Turbulence IX - Proceedings of the iTi Conference in Turbulence, 2021
A2 - Örlü, Ramis
A2 - Talamelli, Alessandro
A2 - Peinke, Joachim
A2 - Oberlack, Martin
PB - Springer
T2 - 9th iTi Conference on Turbulence, iTi 2021
Y2 - 25 February 2021 through 26 February 2021
ER -