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In-Flight determination of acoustic and hydrodynamic pressure fluctuations

Haxter, Stefan and Spehr, Carsten (2013) In-Flight determination of acoustic and hydrodynamic pressure fluctuations. AIA-DAGA 2013 Conference on Acoustic, 18. - 21. March 2013, Merano, Italy.

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Official URL: http://www.aia-daga.eu


In-flight measurements and wind tunnel measurements of pressure fluctuations underneath a turbulent boundary layer were conducted. The characteristics of turbulent structures in the boundary layer is important for determination of the excitation of aircraft panels and therefore for the generation of cabin noise. A transient pressure transducer array was used in a flight test in order to obtain properties of the boundary layer concerning the turbulent excitation of aircraft hull at full scale. The array was designed to distinguish between acoustical and convective waves by means of frequency and wavenumber. Another feature of the array was the ability to extract the direction of flow directly out of the transducer phase data. The consideration of flow direction is important when investigating the convective transport of coherent structures in the turbulent boundary layer. Using the present array, the alignment of the transducers with the flow is not necessary. A similar array was used in wind tunnel tests at equal conditions.

Item URL in elib:https://elib.dlr.de/78353/
Document Type:Conference or Workshop Item (Speech, Paper)
Title:In-Flight determination of acoustic and hydrodynamic pressure fluctuations
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Refereed publication:No
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Page Range:pp. 1929-1932
Series Name:Conference Proceedings on CD-ROM
Keywords:In-flight determination, microphone array, turbulent boundary layer, acoustic and hydrodynamic fluctuation
Event Title:AIA-DAGA 2013 Conference on Acoustic
Event Location:Merano, Italy
Event Type:international Conference
Event Dates:18. - 21. March 2013
Organizer:Deutsche Gesellschaft für Akustik e.V.
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Aircraft Research (old)
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Simulation & Validation (old)
Location: Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Experimental Methods
Deposited By: Micknaus, Ilka
Deposited On:15 Jul 2013 15:48
Last Modified:15 Jul 2013 15:48

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