Print Email Facebook Twitter Characterisation of plasma synthetic jet actuators in quiescent flow Title Characterisation of plasma synthetic jet actuators in quiescent flow Author Zong, H. (TU Delft Aerodynamics) Kotsonis, M. (TU Delft Aerodynamics) Date 2016 Abstract An experimental characterisation study of a large-volume three-electrode plasma synthetic jet actuator (PSJA) is presented. A sequential discharge power supply system is used to activate the PSJA. Phase-locked planar particle image velocimetry (PIV) and time-resolved Schlieren imaging are used to characterise the evolution of the induced flow field in quiescent flow conditions. The effect of orifice diameter is investigated. Results indicate three distinct features of the actuator-induced flow field. These are the initial shock waves, the high speed jet and vortex rings. Two types of shock waves with varied intensities, namely a strong shock wave and a weak shock wave, are issued from the orifice shortly after the ignition of the discharge. Subsequently, the emission of a high speed jet is observed, reaching velocities up to 130 m s−1. Pronounced oscillation of the exit velocity is caused by the periodical behaviour of capacitive discharge, which also led to the formation of vortex ring trains. Orifice diameter has no influence on the jet acceleration stage and the peak exit velocity. However, a large orifice diameter results in a rapid decline of the exit velocity and thus a short jet duration time. Vortex ring propagation velocities are measured at peak values ranging from 55 m s−1–70 m s−1. In the case of 3 mm orifice diameter, trajectory of the vortex ring severely deviates from the actuator axis of symmetry. The development of this asymmetry in the flow field is attributed to asymmetry in the electrode configuration. Subject plasmasynthetic jetactuatorflow controlflow fieldcharacterisetion To reference this document use: http://resolver.tudelft.nl/uuid:6e70f66d-ea2c-48d9-84de-e2b75df18c04 DOI https://doi.org/10.1088/0022-3727/49/33/335202 Embargo date 2017-12-01 ISSN 0022-3727 Source Journal of Physics D: Applied Physics, 49 (33) Part of collection Institutional Repository Document type journal article Rights © 2016 H. Zong, M. Kotsonis Files PDF Characterisation_of_Plasm ... _Flow_.pdf 2.45 MB Close viewer /islandora/object/uuid:6e70f66d-ea2c-48d9-84de-e2b75df18c04/datastream/OBJ/view