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TsAGI Science Journal

ISSN Imprimir: 1948-2590
ISSN En Línea: 1948-2604

TsAGI Science Journal

DOI: 10.1615/TsAGISciJ.v41.i1.90
pages 97-107

CORONA DISCHARGE MICROJETS AS POSSIBLE ACTUATORS FOR JET NOISE CONTROL

Victor F. Kopiev
Central Aerohydrodynamic Institute (TsAGI) 1, Zhukovsky str., Zhukovsky, 140180,Moscow region, Russia
N. N. Ostrikov
Central Aerohydrodynamic Institute (TsAGI) 1, Zhukovsky str., Zhukovsky, 140180,Moscow region, Russia

SINOPSIS

The objective of this study is to find instruments for active turbulent jet noise control that are based on the resonant breakdown of large-scale power-intensive vortices. For resonant excitation of largescale vortex rings in turbulent jets, it is for the first time suggested to use the microjets generated by pulsating corona discharge. A system of actuators with six anode needles is proposed for resonant excitation of Bessel oscillation modes of the ring vortex core. The presence of the effect of the destruction of the vortex rings is demonstrated in the jet velocity range 12−30 m/s. It is shown that this effect is sensitive to the configuration of the whole system of actuators, including the mutual position of each pair of anode and cathode needles as well as the positioning of anode needle relative to the flow direction. The main conclusion consists of the fact that the effect of the destruction of vortex rings is of a resonant nature, since it is achieved only by the action of pulsating microjets, and not by the action of steady microjets generated by dc corona discharge.


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