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Aeroakustische Optimierung eines Geblaeses

Lohmann, D. (1993) Aeroakustische Optimierung eines Geblaeses. Project Report, DLR-Interner Bericht.

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This is the third part of basic numerical research work conducted by the Institute of Design Aerodynamics at DLR Braunschweig, in order of the company AEG Kleinmotoren GmbH, Oldenburg, Germany. The numerical investigations have been made to optimize the aeroacoustics of ducted radiator fans. To find improved geometries of ducted fans, a design method is developed consisting of a validated singularity method and an optimization code. In the case of periodic signals the singularity method is a lifting surface method for both, aerodynamics and acoustics. In the case of random signals the method is a semi-empirical code for acoustics only. By optimization studies based on periodic and stochastic acoustic signals different improved blade geometries were found. The twist and airfoil geometry were kept fix. The first improved blade geometry is characterized by a forward.

Document Type:Monograph (Project Report, DLR-Interner Bericht)
Additional Information: LIDO-Berichtsjahr=1996,
Title:Aeroakustische Optimierung eines Geblaeses
AuthorsInstitution or Email of Authors
Number of Pages:56
Keywords:Propeller-Aeroakustik, LBS-Methode, Kuehlerventilator
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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