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Measurements of flow-induced excitation of lightweight vehicle structures

Galuba, Judith and Spehr, Carsten (2015) Measurements of flow-induced excitation of lightweight vehicle structures. inter.noise2015, 09. – 12. Aug. 2015, San Francisco, CA, USA.

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Official URL: http://internoise2015.com/

Abstract

The use of lightweight construction in vehicle manufacturing is an interesting possibility for reducing fuel consumption. At present lightweight constructions are being used to lower the weight not only of new aircraft but also of new terrestrial vehicles. However, these construction methods using new materials place new demands on the level of vehicle acoustics to ensure that passenger comfort is maintained and/or improved. The acoustic and hydrodynamic pressure fluctuations arising from excitation of the fuselage during cruise flight, of the side window in cars and of the body of high-speed trains is one of the major sources of noise. The German Aerospace Center conducted three flight tests on a single aisle medium-range aircraft to measure the noise excitation, transmission and radiation into the cabin. These measurements are used to quantify the excitation and to validate numerical simulations. A pressure sensor array was used to measure the turbulent boundary layer. With this array it was possible to separate the hydrodynamic from the acoustic pressure fluctuations. The results are used to describe the aeroacoustic sources in a more precise manner than that given by the two current, state of the art models (Corcos, Efimtsov). These same methods were used to measure the hydrodynamic and acoustic pressure fluctuations at the side window of a generic car model.

Item URL in elib:https://elib.dlr.de/96139/
Document Type:Conference or Workshop Item (Speech)
Additional Information:in15_252
Title:Measurements of flow-induced excitation of lightweight vehicle structures
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Galuba, Judithjudith.galuba (at) dlr.deUNSPECIFIED
Spehr, CarstenCarsten.Spehr (at) dlr.deUNSPECIFIED
Date:2015
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Page Range:pp. 1-10
Series Name:Conference Proceedings on USB-Stick
Status:Published
Keywords:lightweight structures, measurements of flow-induced excitation, aeroacoustic sources, vehicle acoustics, flight test
Event Title:inter.noise2015
Event Location:San Francisco, CA, USA
Event Type:international Conference
Event Dates:09. – 12. Aug. 2015
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:fixed-wing aircraft
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Simulation and Validation
Location: Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Experimental Methods
Deposited By: Micknaus, Ilka
Deposited On:19 Aug 2015 15:03
Last Modified:19 Aug 2015 15:03

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