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Wavenumber spectrum determination for transsonic wind tunnel measurements using FISTA

Spehr, Carsten and Ahlefeldt, Thomas and Ernst, Daniel (2023) Wavenumber spectrum determination for transsonic wind tunnel measurements using FISTA. In: FLINOVIA IV Abstracts, pp. 1-3. FLINOVIA IV - FLOW-INDUCED-NOISE AND VIBRATION ISSUESAND ASPECTS, 22.-24. May 2023, UNSW Sydney, Australia.

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Official URL: https://conference.unsw.edu.au/en/Flinovia


This paper deals with computational methods to determine the wavenumber spectrum of pressure fluctuation data measured by a phased sensor array underneath a transsonic boundary layer. The data are measured underneath a turbulent boundary layer of a flat plate in the transsonic wind tunnel Braunschweig with closed test section . The data were were previously published in 2012 using beamforming and a a so called embedded DAMAS2 deconvolution algorithm to obtain the wavenumber spectrum [1]. The aim of this paper is to re-post-processing these data with the newly introduced framework to find a well-defined unique solution with parametric L1 and L2 regularization. The measurements were conducted in the Transonic-Wind-Tunnel Gottingen (TWG) a continously working wind tunnel with a cross section of 1 m x 1 m. A rigid flat plate with a length of about 2.75 m was mounted symmetrically in the closed test section. In the downstream part of the plate a sensor array with 48 piezo-resistive transduces is integrated using a threaded mounting.

Item URL in elib:https://elib.dlr.de/196060/
Document Type:Conference or Workshop Item (Speech)
Additional Information:https://conference.unsw.edu.au/en/Flinovia#conferenceprogram; After the conference, the contributed papers are considered for publication in a printed version edited by Springer.
Title:Wavenumber spectrum determination for transsonic wind tunnel measurements using FISTA
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Spehr, CarstenUNSPECIFIEDhttps://orcid.org/0000-0002-2744-3675UNSPECIFIED
Ahlefeldt, ThomasUNSPECIFIEDhttps://orcid.org/0000-0002-2869-2665UNSPECIFIED
Ernst, DanielUNSPECIFIEDhttps://orcid.org/0000-0001-7920-9162UNSPECIFIED
Date:May 2023
Journal or Publication Title:FLINOVIA IV Abstracts
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Page Range:pp. 1-3
Series Name:Program and Book of Abstracts
Keywords:phased sensor array, turbulent boundary layer, Wavenumber spectrum determination, FISTA, Transonic-Wind-Tunnel Gottingen (TWG)
Event Location:UNSW Sydney, Australia
Event Type:international Conference
Event Dates:22.-24. May 2023
Organizer:Flow Noise Group
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Efficient Vehicle
DLR - Research area:Aeronautics
DLR - Program:L EV - Efficient Vehicle
DLR - Research theme (Project):L - Virtual Aircraft and  Validation
Location: Göttingen
Institutes and Institutions:Institute for Aerodynamics and Flow Technology > Experimental Methods, GO
Deposited By: Micknaus, Ilka
Deposited On:19 Jul 2023 16:17
Last Modified:19 Jul 2023 16:17

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