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Journal Articles International Journal of Aeroacoustics Year : 2016

Zonal large-eddy simulation of a tip leakage flow

Abstract

The flow induced by the clearance between the tip of an isolated airfoil and an end-plate is investigated numerically, using a zonal approach with large-eddy simulation in the region of interest. The results are analyzed in comparison with available experimental data, presented in a companion paper. The incoming boundary layer and the pressure distribution around the blade are evaluated. The description of the inflow-jet deviation, with an averaged approach, enables to represent the proper loading on the airfoil. Also, particular attention is paid to the powerful tip-leakage vortex. The vortex characteristics are investigated using specific functions to locate its center and quantify its width. Overall, good results are obtained for the flow statistics and spectra. Furthermore, a very good description of the far-field pressure is achieved using the acoustic analogy, and the results confirm that the tip-flow essentially radiates in the central frequency range (0.7 kHz, 7 kHz).
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Dates and versions

hal-03814348 , version 1 (13-10-2022)

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Jérôme Boudet, Joëlle Caro, Bo Li, Emmanuel Jondeau, Marc Jacob. Zonal large-eddy simulation of a tip leakage flow. International Journal of Aeroacoustics, 2016, 15 (6-7), pp.646-661. ⟨10.1177/1475472X16659215⟩. ⟨hal-03814348⟩
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