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Wavelet Analysis of a Blade Tip-Leakage Flow

Boudet, Jérôme and Jacob, Marc C. and Caro, Joëlle and Jondeau, Emmanuel and Li, Bo Wavelet Analysis of a Blade Tip-Leakage Flow. (2018) AIAA Journal, 56 (8). 3332-3336. ISSN 0001-1452

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Official URL: https://doi.org/10.2514/1.J056703

Abstract

The secondary flow generated by the clearance between an isolated airfoil tip and an end-plate is analyzed by means of a zonal large-eddy simulation, in comparison with available experimental data. The flow around the tip clearance is described with full large-eddy simulation, while Reynolds-averaged Navier-Stokes is employed in the rest of the computational domain in order to limit the computational cost. The various analyses of the flow characteristics (mean velocities, Reynolds stresses, spectra) show a very good agreement between the experiment and the simulation. Furthermore, a detailed analysis is carried out from the numerical results. The flow separations on the blade tip are related with the leakage distribution along the chord, which generates an intense tip-leakage vortex on the suction side. Finally, a hump in the pressure spectra at tip is investigated by means of a wavelet conditional average, and related to the unsteadiness of the aft tip separation

Item Type:Article
HAL Id:hal-01852117
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 de Lyon - UDL (FRANCE)
Laboratory name:
Funders:
European Community - FP6 PROBAND AST4-2005-012222 - Agence Nationale de la Recherche (ANR) - AXIOOM - National Natural Science Foundation of China (NSFC) - AXIOOM - Centre informatique national de l’enseignement supérieur (CINES) - China Scholarship Council (CSC)
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Deposited By: Marc C. JACOB
Deposited On:31 Jul 2018 15:10

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