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Flow-induced noise generation on orifice plates in air conditioning ducts

Spehr, Carsten and Alvarez, Julian and Delfs, Jan (2006) Flow-induced noise generation on orifice plates in air conditioning ducts. In: 2006 Inter-Noise. Inter-Noise 2006, 2006-12-03 2006-12-6, Honolulu, Hawaii, (USA).

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Abstract

In the present study the acoustic sources generated by turbulent flow inside internal ducts are studied experimentally. The noise is generated due to the flow passing typical components used in the aircraft climate control system, like bifurcations, orifices or bends. The experimental set-up consists of a straight tube, in which the air is driven by a silent fan followed by a silencer. This study is the first of a series of experiments to examine the influence of upstream generated turbulence on the sound generation on the components of pipe systems. In this preliminary study a configuration of one orifice with varying inner diameter is examined. The acoustic measurements were conducted for a frequency range of 63 Hz to 10 kHz. Thereby, the dependence on the generated noise on the Mach number and on the radius of the orifices could be determined.

Item URL in elib:https://elib.dlr.de/53619/
Document Type:Conference or Workshop Item (Speech, Paper)
Title:Flow-induced noise generation on orifice plates in air conditioning ducts
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Spehr, CarstenUNSPECIFIEDUNSPECIFIED
Alvarez, JulianAirbus-SpainUNSPECIFIED
Delfs, JanUNSPECIFIEDUNSPECIFIED
Date:6 December 2006
Journal or Publication Title:2006 Inter-Noise
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:Air conditioning systems, noise, experimental, turbulence
Event Title:Inter-Noise 2006
Event Location:Honolulu, Hawaii, (USA)
Event Type:international Conference
Event Dates:2006-12-03 2006-12-6
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:L VU - Air Traffic and Environment (old)
DLR - Research area:Aeronautics
DLR - Program:L VU - Air Traffic and Environment
DLR - Research theme (Project):L - Quiet Air Traffic (old)
Location: Braunschweig
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Technical Acoustics
Deposited By: Spehr, Dr.-Ing. Carsten
Deposited On:17 Mar 2008
Last Modified:12 Dec 2013 20:30

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