Investigation of flow separation control by nanosecond pulsed dielectric barrier discharge actuators

N. Grech; P. Leyland; Ph. Peschke; P. Ott

doi:10.1051/eucass/201507191

All issues

Volume 7 (2015)

10.1051/eucass/201507191

Abstract

Open Access

Issue		Volume 7, 2015 Progress in Flight Physics – Volume 7


Page(s)		191 - 210
Section		Flow control
DOI		https://doi.org/10.1051/eucass/201507191
Published online		08 June 2015

Progress in Flight Physics 7 (2015) 191-210

Investigation of flow separation control by nanosecond pulsed dielectric barrier discharge actuators

N. Grech¹, P. Leyland¹, Ph. Peschke² and P. Ott²

¹ GR-SCI-IAG, IGM Station 9, Ecole Polytechnique Fédérale de Lausanne (EPFL) Lausanne CH-1015, Switzerland
² GR-SCI-GTT, IGM Station 9, Ecole Polytechnique Fédérale de Lausanne (EPFL) Lausanne CH-1015, Switzerland

Abstract

The ability of nanosecond pulsed dielectric barrier discharge (DBD) actuators to control flow separation was investigated on a NACA (National Advisory Committee for Aeronautics) 0015 profile for velocities up to 24 m/s (Re = 230,000). The optimal location for the actuator was determined from oil flow experiments. Moderate voltage levels were applied (3 and 6 kV) and the actuator was operated at frequencies ranging from 0.058 to 10 kHz in pulse and burst modes. The peak effectiveness of the actuator occurred at reduced frequency values of around 1. Plasma influence was observed at all tested angles of attack (up to 26°) and the stall angle was delayed by 8°.