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.
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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)|
|Title:||Optimization of Temperature-Sensitive Paint Formulation|
|In ISI Web of Science:||No|
|Page Range:||pp. 70-76|
|Series Name:||Conference Proceedings ICIASF 2003 Record|
|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|
|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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