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Journal Articles International Journal of Aeroacoustics Year : 2016

Time-resolved PIV measurements of a tip leakage flow

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 [Formula: see text] angle of attack between two horizontal plates, a [Formula: see text] gap being maintained between the airfoil tip and the lower (casing) plate. The mean flow velocity is [Formula: see text] , which corresponds to a [Formula: see text] Mach number and a chord-based Reynolds number of [Formula: see text] . 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.
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Dates and versions

hal-03814349 , version 1 (13-10-2022)

Identifiers

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Marc Jacob, Emmanuel Jondeau, Bo Li. Time-resolved PIV measurements of a tip leakage flow. International Journal of Aeroacoustics, 2016, 15 (6-7), pp.662-685. ⟨10.1177/1475472X16659384⟩. ⟨hal-03814349⟩
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