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/ | |||||||||||||||
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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: |
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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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