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Sound Generation by Low Mach Number Flow Through Pipes with Diaphragm Orifices

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/
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:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Obermeier, FrankIns. f. Meschanik u. Fluiddynamik TU Bergakademie FreibergUNSPECIFIED
Konstantinov, Mikhailmikhail.konstantinov (at) dlr.deUNSPECIFIED
Shishkin, AndreiAndrei.Shishkin (at) dlr.deUNSPECIFIED
Wagner, Clausclaus.wagner (at) dlr.deUNSPECIFIED
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:
EditorsEmail
Dillmann, AndreasDeutsches Zentrum für Luft- und
Heller, GerdAirbus Deutschland, Bremen
Krämer, EwaldUniversity of Stuttgart
Krepiln, Hans-PeterDeutsches Zentrum für Luft- und
Nitsche, WolfgangTU Berlin
Rist, UlrichUniversity of Stuttgart
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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