Cahuzac, A. and Boudet, J. and Jacob, M. C. and Kausche, Ph. (2011) Large-Eddy Simulation of a rotor tip-clearance flow. In: Proceedings 17th AIAA / CEAS Aeroacoustics Conference (32nd Aeroacoustics Conference). AIAA. 17th AIAA / CEAS Aeroacoustics Conference (32nd AIAA Aeroacoustics Conference), 05.06. - 08.06.2011, Portland, USA.
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Tip-leakage flows constitute a major concern for turbomachine performances, stability and broadband noise generation. A large-eddy simulation (LES) of a rotor blade is here presented and compared to experimental data from DLR. A particular attention is paid to the flow configuration of the simulation. The simulation of the inlet duct allows to recover accurately the flow conditions at the fan face. Downstream of the rotor, a detailed analysis of the mean velocity and turbulence intensity is carried out: 2D flow maps, radial profiles of azimuth-averaged variables and wake parameters are plotted. The focus point of the present study is the complex tip-gap flow, and LES is shown to reproduce remarkably the experimental data in this region. These results are achieved in spite of a spurious separation that occurs on the blade suction-side and affects the lower radii (mid-span and hub regions). Finally, the velocity spectra computed by LES in the tip region are in very good agreement with the experimental data. The broadband content is accurately simulated over the whole experimental range of frequencies.
|Document Type:||Conference or Workshop Item (Paper)|
|Title:||Large-Eddy Simulation of a rotor tip-clearance flow|
|Journal or Publication Title:||Proceedings 17th AIAA / CEAS Aeroacoustics Conference (32nd Aeroacoustics Conference)|
|In ISI Web of Science:||No|
|Keywords:||Large-Eddy Simulation, LES, tip clearance flow, fan, turbomachine, hot wire measurement, tip vortex, broadband noise|
|Event Title:||17th AIAA / CEAS Aeroacoustics Conference (32nd AIAA Aeroacoustics Conference)|
|Event Location:||Portland, USA|
|Event Type:||international Conference|
|Event Dates:||05.06. - 08.06.2011|
|HGF - Research field:||Aeronautics, Space and Transport|
|HGF - Program:||Aeronautics|
|HGF - Program Themes:||Propulsion Systems|
|DLR - Research area:||Aeronautics|
|DLR - Program:||L ER - Engine Research|
|DLR - Research theme (Project):||L - Fan and Compressor Technologies|
|Institutes and Institutions:||Institute of Propulsion Technology > Engine Acoustic|
|Deposited By:||Balbir Kaur|
|Deposited On:||20 Jan 2012 14:45|
|Last Modified:||09 Feb 2012 15:45|
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