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Development of a time-resolved quantitative surface-temperature measurement technique and its application in short-duration wind tunnel testing

Risius, Steffen (2018) Development of a time-resolved quantitative surface-temperature measurement technique and its application in short-duration wind tunnel testing. Dissertation, Deutsches Zentrum für Luft- und Raumfahrt e.V..

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Official URL: http://hdl.handle.net/11858/00-1735-0000-002E-E44D-A

Abstract

In this cumulative thesis, a time-resolved quantitative temperature-sensitive paint (TSP) measurement technique was developed and used to measure temperatures at subsonic and up to hypersonic flow velocities in two different short duration wind tunnels. Based on this measurement technique it was possible to calculate the heat transfer into a wedge model in the High Enthalpy Shock Tunnel Göttingen (HEG). Furthermore, the measurement technique was developed further to determine the location of laminar-turbulent transition on the two-dimensional wind tunnel model PaLASTra, which offers a quasi-uniform streamwise pressure gradient, in the Cryogenic Ludwieg-Tube Göttingen (DNW-KRG) with temporal and spatial accuracy that had not been reached before. The quantitative temperature results obtained from TSP measurements allowed the systematic analysis of unit Reynolds number, Mach number and pressure gradient effects on laminar-turbulent transition at flow speeds from M = 0.35 to 0.77.

Item URL in elib:https://elib.dlr.de/121865/
Document Type:Thesis (Dissertation)
Additional Information:Georg-August-Universität Göttingen, Fakultät für Physik (inkl. GAUSS), Gutachter: Prof. Dr. Dr. Dillmann, Andreas; Gutachter: Prof. Dr. Rein, Martin
Title:Development of a time-resolved quantitative surface-temperature measurement technique and its application in short-duration wind tunnel testing
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Risius, Steffensteffen.risius (at) dlr.dehttps://orcid.org/0000-0002-5530-9609
Date:2018
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Page Range:pp. 1-145
Status:Published
Keywords:boundary layer; COCO; compressibility effect; critical N-factor; Cryogenic Ludwieg-Tube Göttingen (DNW-KRG); freestream pressure fluctuations; heat transfer; High Enthalpy Shock Tunnel (HEG); hypersonic flow; laminar-turbulent transition; LILO; linear stability analysis; Mach number effect; PaLASTra; temperature distribution; temperature-sensitive paint (TSP); Tollmien-Schlichting; transonic wind tunnel
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:26 Sep 2018 14:44
Last Modified:31 Jul 2019 20:19

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