Abstract
We have developed a lifetime imaging system to simultaneously measure pressure and temperature image from a luminescent decay of pressure-sensitive paint (PSP). Analysis of PtTFPP-PSP by a streak camera showed the dependence of luminescent lifetime decays on pressure and temperature. We have built a lifetime imaging system (LIS) composed of a pulsed laser and an ICCD camera. The three gated times of a CCD camera were determined referring to the streak camera data. The performance of this system was evaluated over the wide range of pressure and temperature using a PSP coupon as a test article. As a result, the ratios of the gated images could be fitted with a smooth function of pressure and temperature. This allowed us to reconstruct pressure and temperature from three luminescent lifetime images. Furthermore, as a verification test, pressure and temperature map induced by a sonic-jet impingement flow were visualized. PSP data agreed with pressure tap data, indicating that this lifetime imaging system allowed us to measure pressure and temperature field.
