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Wall Image Velocimetry through deviation of temperature disturbances transport from Taylor hypothesis

Miozzi, Massimo and Di Felice, Fabio and Klein, Christian and Costantini, Marco (2019) Wall Image Velocimetry through deviation of temperature disturbances transport from Taylor hypothesis. In: Proceedings of the 13th International Symposium on Particle Image Velocimetry (188), pp. 478-484. Universität der Bundeswehr München: AtheneForschung. 13th International Symposium on Particle Image Velocimetry (ISPIV 2019), 22.-24. July 2019, Munich, Germany.

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Official URL: https://athene-forschung.unibw.de/128737

Abstract

In this paper the feasibility of a strategy to retrieve quantitative estimations of the skin friction t is reported. The strategy grounds on the measurement of the propagation speed UT of temperature disturbances Tw very close to the surface of a slender body, as obtained by means of a Temperature Sensitive Paint. Here we shortly report about relationships between speed of convection of disturbances of different fluid dynamic quantities, as retrieved from literature and about a Taylor-Hypothesis-based, physically motivated way to extract an average convection velocity from time histories of Tw maps. Then, results in terms of streamwise component of friction velocity and friction coefficient are presented for the suction side of a NACA 0015 hydrofoil model at a Reynolds number Re = 1:8 × 105 and Angles of Attack AoA = [1◦;3◦;5◦;7◦;10◦]. The profiles of time and spanwise averaged friction coefficient Cf(x) are proposed and commented. Time averaged maps (i.e. streamwise and spanwise averaged distributions) of ut are reported and commented as well.

Item URL in elib:https://elib.dlr.de/128622/
Document Type:Conference or Workshop Item (Speech)
Additional Information:Paper No. 188 / 128901, Session: 1.3.D Convection & Heat, Open Access ja oder nein?: Ja / Yes
Title:Wall Image Velocimetry through deviation of temperature disturbances transport from Taylor hypothesis
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Miozzi, Massimomassimo.miozzi (at) cnr.ithttps://orcid.org/0000-0002-6733-078X
Di Felice, Fabiofabio.difelice (at) cnr.itUNSPECIFIED
Klein, Christianchristian.klein (at) dlr.dehttps://orcid.org/0000-0001-7592-6922
Costantini, Marcomarco.costantini (at) dlr.dehttps://orcid.org/0000-0003-0642-0199
Date:2019
Journal or Publication Title:Proceedings of the 13th International Symposium on Particle Image Velocimetry
Refereed publication:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Page Range:pp. 478-484
Editors:
EditorsEmail
Christian J., Prof. KählerUniversität der Bundeswehr München
Rainer, HainUniversität der Bundeswehr München
Sven, ScharnowskiUniversität der Bundeswehr München
Thomas, FuchsUniversität der Bundeswehr München
Publisher:Universität der Bundeswehr München: AtheneForschung
Series Name:Conference Proceedings online
Status:Published
Keywords:Skin Friction, Temperature-Sensitive Paint, Taylor Hypothesis
Event Title:13th International Symposium on Particle Image Velocimetry (ISPIV 2019)
Event Location:Munich, Germany
Event Type:international Conference
Event Dates:22.-24. July 2019
Organizer:UniBw München
Institution:CNR-INM, 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:31 Jul 2019 17:56
Last Modified:31 Jul 2019 17:56

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