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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: |
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| 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, L ER - Engine Research | ||||||
| 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: | 23 Feb 2011 11:55 |
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