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Obtaining phase velocity of turbulent boundary layer pressure fluctuationsat high subsonic Mach number from wind tunnel data affectedby streng background noise

Haxter, Stefan and Brouwer, Jens and Sesterhenn, Jörn and Spehr, Carsten (2017) Obtaining phase velocity of turbulent boundary layer pressure fluctuationsat high subsonic Mach number from wind tunnel data affectedby streng background noise. Journal of Sound and Vibration (402), pp. 85-103. Elsevier. ISSN 0022-460X

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Official URL: https://www.journals.elsevier.com/journal-of-sound-and-vibration

Abstract

Boundary layer measurements at high subsonic Mach number are evaluated in order to obtain the dominant phase velocities of boundary layer pressure fluctuations. The measurements were performed in a transonic wind tunnel which had a very strong background noise. The phase velocity was taken from phase inclination and from the convective peak in one-and two­dimensional wavenumber spectra. An approach was introduced to remove the acoustic noise from the data by applying a method based on CLEAN-SC on the two-dimensional spectra, thereby increasing the frequency range where information about the boundary layer was retrievable. A comparison with prediction models showed some discrepancies in the low­frequency range. Therefore, pressure data from a DNS calculation was used to substantiate the results ofthe analysis in this frequency rang. Using the measured data, the DNS results and a review of the models used for comparison it was found that the phase velocity decreases at low frequencies.

Item URL in elib:https://elib.dlr.de/116832/
Document Type:Article
Additional Information:Journal of Sound and Vibration 402 (2017) 85-103; ISSN: 0022-460X; Available online 13 May 2017
Title:Obtaining phase velocity of turbulent boundary layer pressure fluctuationsat high subsonic Mach number from wind tunnel data affectedby streng background noise
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Haxter, StefanStefan.Haxter (at) dlr.deUNSPECIFIED
Brouwer, JensTU Berlin, Institut für Strömungsmechanik und Technische AkustikUNSPECIFIED
Sesterhenn, JörnTU Berlin, Institut für Strömungsmechanik und Technische AkustikUNSPECIFIED
Spehr, Carstencarsten.spehr (at) dlr.deUNSPECIFIED
Date:2017
Journal or Publication Title:Journal of Sound and Vibration
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Page Range:pp. 85-103
Publisher:Elsevier
ISSN:0022-460X
Status:Published
Keywords:Phase velocity, wind tunnel measurement, CLEAN-SC
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: Bachmann, Barbara
Deposited On:13 Dec 2017 14:33
Last Modified:10 Jan 2019 15:49

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