Original title: Investigation of 3D flow structures in a linear blade cascade with stereo particle image velocimetry
Authors: Šnábl, Pavel ; Procházka, Pavel P. ; Uruba, Václav ; Pešek, Luděk
Document type: Papers
Conference/Event: Engineering mechanics 2024 /30./, Milovy (CZ), 20240514
Year: 2024
Language: eng
Abstract: In most experiments and numerical calculations of flow through blade cascades, there is a tendency to reduce the problem to 2D. This is understandable due to the design of the experimental rigs and measurement methods, as well as the very long computation times of 3D numerical flow simulations. In reality, however, 3D flow structures such as streamwise vortices begin to appear in wakes behind profiles even for 2D geometry even at low Reynolds nubers. They can create force variations acting along the blade span, which can be represented on average by the 2D measurement and simulation and give a correct result, e.g. for the total lift and drag of the profile. However, when investigating dynamic aeroelastic instabilities such as flutter, local variations in aerodynamic forces can greatly influence the overall behaviour, e.g. by inducing stall flutter.
Keywords: 3D flow structures; blade cascade; Experimental flow dynamics; stereo PIV
Project no.: GA24-12144S (CEP)
Funding provider: GA ČR
Host item entry: Engineering mechanics 2024. Book of full texts, ISBN 978-80-214-6235-9, ISSN 1805-8248

Institution: Institute of Thermomechanics AS ČR (web)
Document availability information: Fulltext is available at the institute of the Academy of Sciences.
Original record: https://hdl.handle.net/11104/0358158

Permalink: http://www.nusl.cz/ntk/nusl-668300


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