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Experimental Validation of Unsteady Pressure-Sensitive Paint for Acoustic Applications

Gößling, Jan (2018) Experimental Validation of Unsteady Pressure-Sensitive Paint for Acoustic Applications. Bachelor's. DLR-Interner Bericht. DLR-IB-AS-GO-2018-184, 97 S.

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Abstract

Unsteady Pressure-Sensitive Paint (iPSP) is evaluated for measurements of acoustic pressure distributions similar to the acoustic pressures found inside the Aeroacoustic Wind Tunnel (AWT). A test facility is designed which allows to measure these acoustic pressure distributions with iPSP. The aim of the evaluation is to detect pressure amplitudes below 100 Pa with multi frequency excitation between 1000...4000 Hz, based on the parameters in AWT. To increase the signal-to-noise ratio the data analysis methods; phase averaging, proper orthogonal decomposition, and dynamic mode decomposition (DMD) are compared to each other and the DMD is identified to be the most powerful for this application. The measurement setup combined with the DMD is capable of detecting pressure amplitudes below 11 Pa in multi frequency phenomena with frequencies up to 4615 Hz. The minimal obtained detectable pressure limit is 5 Pa at 1318 Hz. This results are a good basis for future measurements with iPSP inside AWT.

Item URL in elib:https://elib.dlr.de/125143/
Document Type:Monograph (DLR-Interner Bericht, Bachelor's)
Title:Experimental Validation of Unsteady Pressure-Sensitive Paint for Acoustic Applications
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Gößling, JanJ. Gößling, Leibniz Universität Hannover, TFDUNSPECIFIED
Date:30 January 2018
Refereed publication:No
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Number of Pages:97
Status:Published
Keywords:Acoustic PSP, DMD, POD, iPSP, acoustic, unsteady
Institution:Deutsches Zentrum für Luft- und Raumfahrt e.V.
Department:AS-EXV
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:15 Jan 2019 13:18
Last Modified:31 Jul 2019 20:23

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