Original title: Evaluation of Interferograms of Unsteady Subsonic Airflow Past a Fluttering Airfoil
Authors: Šidlof, P. ; Riss, Š. ; Vlček, Václav
Document type: Papers
Conference/Event: Topical Problems of Fluid Mechanics 2016, Praha (CZ), 2016-02-10 / 2016-02-12
Year: 2016
Language: eng
Abstract: The paper reports on time-resolved interferometric measurements of unsteady ow elds around a uttering NACA0015 airfoil. A mechanical model with two degrees of freedom (pitch and plunge) has been designed and tested in a high-speed subsonic wind tunnel. Aeroelastic instability of the classical utter and dynamic stall type has been observed in the Mach number range M = 0.2 - 0.5. The interferograms were recorded using a Mach-Zehnder interferometer and a high-speed camera. An in-house software IFGPro was developed for the postprocessing and evaluation of the interferogram sequences, yielding pressure distribution, lift and drag force on the airfoil.
Keywords: dynamic stall; flow-induced vibration; interferometry; NACA0015 airfoil
Project no.: GA13-10527S (CEP)
Funding provider: GA ČR
Host item entry: Topical Problems of Fluid Mechanics 2016, ISBN 978-80-87012-58-1
Note: Související webová stránka: http://www.it.cas.cz/fm2015/im/im/page/papers%202016

Institution: Institute of Thermomechanics AS ČR (web)
Document availability information: Fulltext is available at the institute of the Academy of Sciences.
Original record: http://hdl.handle.net/11104/0260672

Permalink: http://www.nusl.cz/ntk/nusl-253610


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Research > Institutes ASCR > Institute of Thermomechanics
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