Abstract
A temperature sensitive particle, which can be utilized for the three-dimensional non-intrusive simultaneous measurement of velocity and temperature of water flow, had been developed by one of the author of this study. Presently, non-intrusive measurement of surface temperature has been carried out by developing a temperature sensitive paint and its thermo-optical characteristics are quantified. Even though the temperature sensitive particle can be formed by introducing a fluorescent substance into polystyrene, it cannot be used as a paint which elastically covers many kind of surface. Presently, several polymers have been investigated for the base material for the paint and the polyvinylbuthyral (PVB) is found to fit the condition very well. The thermo-optical characteristics of the temperature sensitive paint made from PVB has been intensively investigated. The optimal concentration of the fluorescent dye and the solvent has been quantified. The effect of the thickness of a paint and its unsteady response are also investigated.
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