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CFD - Analysis of Fan Aeroacoustics - Comparative Studies

Lohmann, D. and Capdevila, H. and Stark, U. and Kuntz, M. (1997) CFD - Analysis of Fan Aeroacoustics - Comparative Studies. Fifth Int. Congress on Sound and Vibration, University of Adelaide, South Australia, 15.-18.12.1997.

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Abstract

The need of aeroacoustically highefficient fans requires more detailed investigations of three dimensional effects and separated flow analysis. Comprehensive studies and code validation for fans have shown, that further development - especially for the influence of sweep - is necessary. Therefore, two different Navier-Stokes Codes, a lifting surface code and a classical method for 3-D cascade flow were used to compute a ducted swept radiator fan. The results of the method are checked against each other and compared with experiments to firstly validate the codes in aerodynamics and secondly deliver data for acoustic calculations. Here the aerodynamic pressure and boundary displacement thickness are taken for the analogy method. The far-field is computed by the use of Rayleighs`s formular. Different flow rates were modeled for a 7-bladed fan geometry. The computational results of static pressure and efficiency are.

Document Type:Conference or Workshop Item (Paper)
Additional Information: LIDO-Berichtsjahr=1997, pages=22,
Title:CFD - Analysis of Fan Aeroacoustics - Comparative Studies
Authors:
AuthorsInstitution or Email of Authors
Lohmann, D.UNSPECIFIED
Capdevila, H.UNSPECIFIED
Stark, U.UNSPECIFIED
Kuntz, M.UNSPECIFIED
Date:1997
Status:Published
Keywords:Aeroakustik, Luefter, Geblaese, CFD-Analyse
Event Title:Fifth Int. Congress on Sound and Vibration, University of Adelaide, South Australia, 15.-18.12.1997
HGF - Research field:UNSPECIFIED
HGF - Program:Aeronautics
HGF - Program Themes:other
DLR - Research area:UNSPECIFIED
DLR - Program:L TT - Triebwerkstechnologien
DLR - Research theme (Project):L - Quiet Air Traffic (old)
Location: Köln-Porz , Braunschweig , Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Institut für Entwurfsaerodynamik
Deposited By: elib DLR-Beauftragter
Deposited On:03 Apr 2006
Last Modified:27 Apr 2009 10:06

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