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Time-resolved PIV measurements of a tip leakage flow

Jacob, Marc C. and Jondeau, Emmanuel and Li, Bo Time-resolved PIV measurements of a tip leakage flow. (2016) International Journal of Aeroacoustics, 15 (6-7). 662-685. ISSN 1475-472X

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Official URL: https://dx.doi.org/10.1177/1475472X16659384

Abstract

Time-resolved PIV and time-resolved stereo PIV measurements are carried out in the tip leakage vortex of a single non-rotating airfoil placed in the potential core of a flanged rectangular jet in free field conditions. The experiment is based on the improvement of an existing rig: a cambered airfoil (NACA5510) now mounted with a 16.5° ± 0.5° angle of attack between two horizontal plates, a 10 mm gap being maintained between the airfoil tip and the lower (casing) plate. The mean flow velocity is 70 m/s, which corresponds to a 0.2 Mach number and a chord-based Reynolds number of 933, 000. Unlike in the former experiment carried out with this rig, the boundary layer thickness is now smaller than the gap, which significantly reduces the interaction between the upstream turbulence and the airfoil leading edge as well as the resulting interaction noise. The measurements described here include the far field. The upstream flow is characterised with hotwire anemometry.LDV profiles are also obtained in the tip leakage region and compared to the PIV measurements. The experiment is also designed to provide validation data for unsteady CFD computations of the same configuration as shown in a companion paper.

Item Type:Article
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Other partners > Institut National des Sciences Appliquées de Lyon - INSA (FRANCE)
Université de Toulouse > Institut Supérieur de l'Aéronautique et de l'Espace - ISAE-SUPAERO (FRANCE)
Other partners > Université Claude Bernard-Lyon I - UCBL (FRANCE)
Other partners > Ecole Centrale de Lyon (FRANCE)
Laboratory name:
Funders:
Agence Nationale de la Recherche (France) - National Natural Science Foundation of China (NSFC)
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Deposited By: Marc C. JACOB
Deposited On:08 Sep 2016 13:08

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