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A Computational Investigation of Broadband Noise Generation in a Low-speed Axial Fan

Ashcroft, Graham and Nuernberger, Dirk (2009) A Computational Investigation of Broadband Noise Generation in a Low-speed Axial Fan. 15th AIAA/CEAS Aeroacoustics Conference, 11.-13. Mai 2009, Miami, USA.

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Abstract

The generation of broadband noise in a lab-scale, low-speed axial fan is investigated computationally. The time-dependent aerodynamic and acoustic fields are computed directly by numerically solving the unsteady compressible Navier-Stokes equations. Through the application of both the Detached Eddy Simulation (DES) and the Large Eddy Simulation (LES) approaches, the larger scale turbulent eddies in the wakes of the rotor- and stator-blades, and the tip-flow regions of the rotors, are resolved directly in the numerical simulations. Alongside assessing the applicability of the applied methods to the modeling of broadband noise sources in turbomachinery, the broadband noise generation processes are investigated, and the results are compared with available hot-wire and surface-pressure data.

Document Type:Conference or Workshop Item (Paper)
Title:A Computational Investigation of Broadband Noise Generation in a Low-speed Axial Fan
Authors:
AuthorsInstitution or Email of Authors
Ashcroft, Grahamgraham.ashcroft@dlr.de
Nuernberger, Dirkdirk.nuernberger@dlr.de
Date:2009
Status:Accepted
Keywords:CFD, Lärm, Breitband
Event Title:15th AIAA/CEAS Aeroacoustics Conference
Event Location:Miami, USA
Event Type:international Conference
Event Dates:11.-13. Mai 2009
Organizer:AIAA/CEAS
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:L VU - Air Traffic and Environment (old), Propulsion Systems
DLR - Research area:Aeronautics
DLR - Program:L VU - Air Traffic and Environment, L ER - Engine Research
DLR - Research theme (Project):L - Quiet Air Traffic (old), L - Virtual Engine and Validation Methods
Location: Köln-Porz
Institutes and Institutions:Institute of Propulsion Technology > Numerical Methodes
Institute of Propulsion Technology > Engine Acoustic
Institute of Propulsion Technology > Fan and Compressor
Deposited By: Dr.(PH.D.) Graham Ashcroft
Deposited On:15 Mar 2010 15:35
Last Modified:12 Dec 2013 20:55

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