Novel methods for evaluation of the Reynolds number of synthetic jets

0429254 - ÚT 2015 RIV DE eng J - Článek v odborném periodiku
Kordík, Jozef - Broučková, Zuzana - Vít, T. - Pavelka, Miroslav - Trávníček, Zdeněk
Novel methods for evaluation of the Reynolds number of synthetic jets.
Experiments in Fluids. Roč. 55, č. 6 (2014), 1757_1-1757_16. ISSN 0723-4864. E-ISSN 1432-1114
Grant CEP: GA ČR GPP101/12/P556
Institucionální podpora: RVO:61388998
Klíčová slova: synthetic jet * synthetic jet actuator * Reynolds number
Kód oboru RIV: BK - Mechanika tekutin
Impakt faktor: 1.670, rok: 2014
http://link.springer.com/article/10.1007%2Fs00348-014-1757-x

The paper proposes four novel methods of evaluation of synthetic jet velocity amplitude (Reynolds number in dimensionless form). The methods are based on the measurement of synthetic jet actuator electrical input (alternating current and voltage) and are applicable for loudspeaker-based actuators with air as the working fluid. Experimental validations are performed by means of hot-wire anemometry and laser Doppler vibrometry. Uncertainty and limitation of the methods are discussed, including a proposal of an adequate incompressibility criterion. Ranges of applicability are specified. Additionally, the results are compared with available literature, namely with another method based on cavity pressure measurements, a good consistency is found.
Trvalý link: http://hdl.handle.net/11104/0234620