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Up in the Air: In-Flight Wavenumber Characterization of Surface Pressure Fluctuations at Transonic Conditions

Haxter, Stefan and Spehr, Carsten (2018) Up in the Air: In-Flight Wavenumber Characterization of Surface Pressure Fluctuations at Transonic Conditions. In: 24th AIAA/CEAS Aeroacoustics Conference, 2018 (3275), pp. 1-11. AIAA. AIAA Aviation Forum 2018, 26.-29. June 2018, Atlanta, USA. DOI: 10.2514/6.2018-3275 ISBN 978-162410560-9

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Official URL: https://doi.org/10.2514/6.2018-3275


One way of representing surface pressure fluctuations is to display them in frequency-dependent wavenumber spectra. They can be used to feed structural vibration predictions model. However, mostly models and experimental data from wind tunnel and water tunnel experiments have been employed. Apart from possible scaling effects, only hydrodynamic pressure fluctuations are incorporated in these models. Some data from flight tests exists, but again this data is limited to sections of the aircraft where the hydrodynamic pressure fluctuations are dominant. In order to consider both, acoustic and hydrodynamic surface pressure fluctuations in flight a beamforming approach is used in the following to determine wavenumber spectra of pressure fluctuations in cruise flight. This allows for the simultaneous characterization of both, hydrodynamic and acoustic pressure fluctuations and for the discrimination between the two. The wavenumber spectra can be used directly as input for the prediction of structural vibration.

Item URL in elib:https://elib.dlr.de/122142/
Document Type:Conference or Workshop Item (Speech)
Additional Information:AIAA 2018-3275, Paper DOI: 10.2514/6.2018-3275
Title:Up in the Air: In-Flight Wavenumber Characterization of Surface Pressure Fluctuations at Transonic Conditions
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Haxter, Stefanstefan.haxter (at) dlr.dehttps://orcid.org/0000-0002-9232-2802
Spehr, Carstencarsten.spehr (at) dlr.dehttps://orcid.org/0000-0002-2744-3675
Date:25 June 2018
Journal or Publication Title:24th AIAA/CEAS Aeroacoustics Conference, 2018
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
DOI :10.2514/6.2018-3275
Page Range:pp. 1-11
EditorsEmailEditor's ORCID iD
Keywords:flight test, wavenumber spectra
Event Title:AIAA Aviation Forum 2018
Event Location:Atlanta, USA
Event Type:international Conference
Event Dates:26.-29. June 2018
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 for Aerodynamics and Flow Technology > Experimental Methods, GO
Deposited By: Micknaus, Ilka
Deposited On:04 Dec 2018 17:29
Last Modified:15 Jul 2020 11:56

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