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Obermeier, Frank and Konstantinov, Mikhail and Shishkin, Andrei and Wagner, Claus (2014) Sound Generation by Low Mach Number Flow Through Pipes with Diaphragm Orifices. In: New Results in Numerical and Experimental Fluid Mechanics IX Notes on Numerical Fluid Mechanics and Multidisciplinary Design, 124. Springer Verlag, Cham Heidelberg New York Dordrecht London. pp. 629-637. ISBN 978-3-319-03157-6. ISSN 1612-2909.
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Official URL: http://link.springer.com/chapter/10.1007/978-3-319-03158-3_64
Abstract
Aerodynamic noise generated by low Mach number flow through a pipe with two differently sized diaphragm orifices is investigated both theoreti-cally as well as numerically. Such a flow may be considered as a simple model of an aircraft climate control system. The theory is based on an acoustic analogy introduced by Möhring and Ober-meier in the seventies. They identified by means of the so-called Green`s vector function acoustic sources in unsteady flows as the unsteady motion of vorticity “vortices are the voice of flows”. In addition, the unsteady flow through the pipe, the aerodynamic sources, and the spectra of sound are evaluated numerically. Here effects of different numerical algorithms (PISO – PIMPLE) and of different numerical boundary condi-tions at the outlet of the pipe (advective, convective – wave transmissive) are identified and discussed.
| Item URL in elib: | https://elib.dlr.de/88421/ | |||||||||||||||||||||
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| Document Type: | Contribution to a Collection | |||||||||||||||||||||
| Additional Information: | Online ISBN978-3-319-03158-3; DOI:10.1007/978-3-319-03158-3_64, ISSN 1860-0824 (electronic), Library of Congress Control Number: 2013957123 | |||||||||||||||||||||
| Title: | Sound Generation by Low Mach Number Flow Through Pipes with Diaphragm Orifices | |||||||||||||||||||||
| Authors: |
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| Date: | 2014 | |||||||||||||||||||||
| Journal or Publication Title: | New Results in Numerical and Experimental Fluid Mechanics IX | |||||||||||||||||||||
| Refereed publication: | Yes | |||||||||||||||||||||
| Open Access: | No | |||||||||||||||||||||
| Gold Open Access: | No | |||||||||||||||||||||
| In SCOPUS: | No | |||||||||||||||||||||
| In ISI Web of Science: | No | |||||||||||||||||||||
| Volume: | 124 | |||||||||||||||||||||
| Page Range: | pp. 629-637 | |||||||||||||||||||||
| Editors: |
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| Publisher: | Springer Verlag, Cham Heidelberg New York Dordrecht London | |||||||||||||||||||||
| Series Name: | Notes on Numerical Fluid Mechanics and Multidisciplinary Design | |||||||||||||||||||||
| ISSN: | 1612-2909 | |||||||||||||||||||||
| ISBN: | 978-3-319-03157-6 | |||||||||||||||||||||
| Status: | Published | |||||||||||||||||||||
| Keywords: | Aero-acoustic sound generation, pipe flow, theory, numerical flow simulation | |||||||||||||||||||||
| HGF - Research field: | Aeronautics, Space and Transport | |||||||||||||||||||||
| HGF - Program: | Transport | |||||||||||||||||||||
| HGF - Program Themes: | Terrestrial Vehicles (old) | |||||||||||||||||||||
| DLR - Research area: | Transport | |||||||||||||||||||||
| DLR - Program: | V BF - Bodengebundene Fahrzeuge | |||||||||||||||||||||
| DLR - Research theme (Project): | V - Project Next Generation Train II (old) | |||||||||||||||||||||
| Location: | Göttingen | |||||||||||||||||||||
| Institutes and Institutions: | Institute of Aerodynamics and Flow Technology > Fluid Systems | |||||||||||||||||||||
| Deposited By: | Micknaus, Ilka | |||||||||||||||||||||
| Deposited On: | 18 Mar 2014 18:11 | |||||||||||||||||||||
| Last Modified: | 18 Mar 2014 18:11 |
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