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Dynamic Visualization of Boundary-Layer Transition in a Pitch-Sweep Test using a Carbon Nanotube TSP

Yorita, Daisuke and Lemarechal, Jonathan and Klein, Christian and Fujita, Koji and Nagai, Hiroki (2018) Dynamic Visualization of Boundary-Layer Transition in a Pitch-Sweep Test using a Carbon Nanotube TSP. In: 18th International Symposium on Flow Visualization (ISFV18) (208m), pp. 1-10. ETH Zurich. 18th International Symposium on Flow Visualization (ISFV18), 26.-29. June 2018, Zürich, Schweiz. DOI: 10.3929/ethz-b-000279205

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Official URL: https://doi.org/10.3929/ethz-b-000279205


A combination of carbon nanotube and Temperature Sensitive Paint (cntTSP) has a potential to visualize dynamic movement of the boundary-layer transition on a model surface. The cntTSP sensor can visualize the surface boundary-layer conditions as temperature distribution based on different heat transfer coefficients in the laminar and turbulent flow. One wide area of interest for the use of cntTSP is the continuous model angle-sweep tests, which are desired in order to improve the data productivity of the wind tunnel tests. In this paper, the applicability of cntTSP to a continuous moving model (pitch-sweep test) is investigated in a low-speed wind tunnel. The laminar to turbulent boundary-layer transition appearing on a simplified airplane model wing is visualized and compared between the pitch-fix and pitch-sweep tests. With the model pitch angel varying transition patterns were successfully visualized by the cntTSP. Influences of the test parameters, e.g. sweep speed and direction, were examined and optimal parameters for the application of cntTSP in angle-sweep test are proposed in this paper.

Item URL in elib:https://elib.dlr.de/124972/
Document Type:Conference or Workshop Item (Speech)
Additional Information:Paper DOI: 10.3929/ethz-b-000279205
Title:Dynamic Visualization of Boundary-Layer Transition in a Pitch-Sweep Test using a Carbon Nanotube TSP
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Yorita, Daisukedaisuke.yorita (at) dlr.deUNSPECIFIED
Lemarechal, JonathanJonathan.Lemarechal (at) dlr.deUNSPECIFIED
Klein, Christianchristian.klein (at) dlr.dehttps://orcid.org/0000-0001-7592-6922
Fujita, KojiInstitute of Fluid Science,Tohoku UniversitUNSPECIFIED
Nagai, HirokiInstitute of Fluid Science,Tohoku UniversitUNSPECIFIED
Date:26 June 2018
Journal or Publication Title:18th International Symposium on Flow Visualization (ISFV18)
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
DOI :10.3929/ethz-b-000279205
Page Range:pp. 1-10
Publisher:ETH Zurich
Series Name:Conference Proceedings, Book of Abstract
Keywords:Temperature-Sensitive Paint, TSP, Transition, Pitch-sweep test
Event Title:18th International Symposium on Flow Visualization (ISFV18)
Event Location:Zürich, Schweiz
Event Type:international Conference
Event Dates:26.-29. June 2018
Institution:Deutsches Zentrum für Luft- und Raumfahrt e.V.
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:09 Jan 2019 10:07
Last Modified:09 Jan 2019 10:07

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