Influence of Carrying Frequency Phase Shift of Synthetic Jet Generator on The Noise

0427864 - ÚT 2015 RIV CZ eng C - Konferenční příspěvek (zahraniční konf.)
Pick, P. - Matějka, Milan - Skála, V.
Influence of Carrying Frequency Phase Shift of Synthetic Jet Generator on The Noise.
Topical Problems of Fluid Mechanics 2014. Praha: Ústav termomechaniky AV ČR, v. v. i., 2014 - (Šimurda, D.; Bodnár, T.), s. 93-96. ISBN 978-80-87012-51-2.
[Topical Problems of Fluid Mechanics 2014. Praha (CZ), 19.02.2014-21.02.2014]
Grant CEP: GA ČR GAP101/10/1230; GA ČR GA101/08/1112
Institucionální podpora: RVO:61388998
Klíčová slova: synthetic jet * modulationfreqency * carrying frequency * noise
Kód oboru RIV: BK - Mechanika tekutin

The main topic of this article is the influence of phase shift of neighbouring synthetic jet generators to the flow field past a hump and noise reduction. Syntheetic jet generators are placed in the hump in front of point of boundary layer separation. The carrying frequency of actuating signal, wich is driving the synthetic jet generator, is shifted for about 180°. The modulated frequency, which corresponds to the shading frequency of the flow, is superposed on the carrying signal. Finally, the benefits of phase shift signal of neighbouring synthetic jet generators are described, as far as the produced noise and the total loss coefficient decrease are concerned.
Trvalý link: http://hdl.handle.net/11104/0235408