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Optimization of Temperature-Sensitive Paint Formulation

Iijima, Y. and Egami, Yasuhiro and Nishizawa, A. and Asai, K. and Fey, Uwe and Engler, Rolf H. (2003) Optimization of Temperature-Sensitive Paint Formulation. IEEE. 20th International Congress on Instrumentation in Aerospace Simulation Facilities (ICIASF 2003), 2003-08-25 - 2008-08-29, Göttingen (Germany). ISBN 0-7803-8149-1.

Full text not available from this repository.

Abstract

In this paper, a new Temperature-Sensitive Paint (TSP) technique for boundary-layer transition detection in a production-type large cryogenic wind tunnel is presented. The formulation of Ru(trpy) based TSP system has been optimized in terms of luminescence intensity and robustness. The optimum dye-binder-solvent combination has been determined through systematic sample tests. A new binder has been introduced and the resulting coating was found free from cracking at cryogenic temperatures. This is contrary to the silicone-based previous cryogenic TSP that are subject to micro cracks at reduced temperatures. The new TSP can meet the root-mean-square roughness requirement less than 0.15 um. Experiments in the NAL 0.1-m Transonic Cryogenic Wind Tunnel have shown that transition occurs earlier on the unpolished surface than the polished surface, although the roughness value itself is increased by polishing. This suggests that the waviness of the coating could affect on the growth of instability in boundary layers.

Document Type:Conference or Workshop Item (Speech, Paper)
Additional Information: LIDO-Berichtsjahr=2003,
Title:Optimization of Temperature-Sensitive Paint Formulation
Authors:
AuthorsInstitution or Email of Authors
Iijima, Y.UNSPECIFIED
Egami, YasuhiroUNSPECIFIED
Nishizawa, A.UNSPECIFIED
Asai, K.National Aerospace Laboratory of Japan, NAL, 7-44-1 Jindaiji-Higashi, Chofu Tokyo 182-8522, Japan
Fey, UweUNSPECIFIED
Engler, Rolf H.UNSPECIFIED
Date:2003
Refereed publication:No
In SCOPUS:No
In ISI Web of Science:No
Page Range:pp. 70-76
Publisher:IEEE
Series Name:Conference Proceedings ICIASF 2003 Record
ISBN:0-7803-8149-1
Status:Published
Keywords:temperature sensitive paint, TSP, cryogenic windtunnel, transition detection, cryo TSP, cryogenic testing, European Transonic Windtunnel, optimization of TSP, large-scaled wind tunnel, ruthenium complex, Ru(trpy), thermal quenching
Event Title:20th International Congress on Instrumentation in Aerospace Simulation Facilities (ICIASF 2003)
Event Location:Göttingen (Germany)
Event Type:international Conference
Event Dates:2003-08-25 - 2008-08-29
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Aeronautics
HGF - Program Themes:Aircraft Research
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Flight Physics
Location: Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Experimental Methods
Deposited By: Ilka Micknaus
Deposited On:01 Dec 2005
Last Modified:14 Jan 2010 19:14

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