Abstract
Intensive efforts have been made to enhance the time response of sprayable pressure-sensitive paint (PSP) to measure the global pressure distribution on a model with a high time resolution. However, conventional sprayable PSPs showed lower time responsibility than an anodized aluminum PSP (AA-PSP). In addition, sprayable fast-responding PSPs have higher temperature sensitivity and much rougher surface than conventional polymer-based PSPs. In this paper, ultrafast-PSP has been developed to achieve a time response comparable to AA-PSP. As a pressure-sensitive dye of the ultrafast-PSP, ruthenium complex Ru(dpp)3 was employed. It has shorter luminescence lifetime than PtTFPP, which is widely used as a dye for fast-PSP. In addition, we investigated the many PSP formulations of polymers, nano-particles, and solvents. It was found that the combination of these materials strongly influenced PSP properties. Finally, we successfully found the optimum formulation of materials to achieve an ultrafast-PSP with a time response of 2–3 μs, which is comparable to the fastest AA-PSP.
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