Novel methods for evaluation of the Reynolds number of synthetic jets

0429254 - ÚT 2015 RIV DE eng J - Journal Article
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
R&D Projects: GA ČR GPP101/12/P556
Institutional support: RVO:61388998
Keywords : synthetic jet * synthetic jet actuator * Reynolds number
Subject RIV: BK - Fluid Dynamics
Impact factor: 1.670, year: 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.
Permanent Link: http://hdl.handle.net/11104/0234620