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Examination of the influence of altitude and speed on fuselage hull excitation parameters induced by the turbulent boundary layer at cruise flight conditions

Haxter, Stefan and Ehrenfried, Klaus and Kröber, Stefan (2012) Examination of the influence of altitude and speed on fuselage hull excitation parameters induced by the turbulent boundary layer at cruise flight conditions. 18. DGLR-Fach-Symposium der STAB, 06. - 07. Nov. 2012, Stuttgart, Deutschland.

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Official URL: http://www.dlr.de/as/desktopdefault.aspx/tabid-652/1104_read-1678/

Abstract

In this paper, flight test measurements are evaluated. The influence of different flight conditions on characteristic parameters concerning the aircraft hull excitement aptitude by the flow is examined. Pressure fluctuation data were acquired from a flight test campaign using a pressure transducer array. In a first evaluation, data have been analyzed for a single flight condition at Ma = 0.78 and an altitude of h = 35,000 ft. Characteristic coherence decay functions and their parameters were determined using the predominant flow direction for each frequency. This evaluation of characteristics of the pressure fluctuations is now applied to different flight altitudes and -speeds. The influence of exterior pressure and flow speed on coherence decay function parameters and the cohvective characteristics will be examined. This way, conclusions about the variation of these decay function parameters with flight attitude can be drawn. Also, the change in charactersitic of the convective transport of pressure fluctuations with flight condition is examined.

Document Type:Conference or Workshop Item (Speech, Paper)
Title:Examination of the influence of altitude and speed on fuselage hull excitation parameters induced by the turbulent boundary layer at cruise flight conditions
Authors:
AuthorsInstitution or Email of Authors
Haxter, StefanUNSPECIFIED
Ehrenfried, KlausUNSPECIFIED
Kröber, StefanUNSPECIFIED
Date:2012
Refereed publication:No
In SCOPUS:No
In ISI Web of Science:No
Page Range:pp. 192-193
Series Name:STAB-Mitteilung
Status:Published
Keywords:turbulent boundary layer, cross-spectral densities, three-window-area,
Event Title:18. DGLR-Fach-Symposium der STAB
Event Location:Stuttgart, Deutschland
Event Type:national Conference
Event Dates:06. - 07. Nov. 2012
Organizer:Die Deutsche Strömungsmechanische Arbeitsgemeinschaft, STAB
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Aircraft Research
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Simulation & Validation
Location: Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Experimental Methods
Institute of Aerodynamics and Flow Technology > Fluid Systems
Deposited By: Ilka Micknaus
Deposited On:19 Nov 2012 16:34
Last Modified:19 Nov 2012 16:34

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