The Frontiers of Pressure-Sensitive Paint Development

Abstract

PSP has been applied to a wide range of applications, starting from steady-state flows in the transonic to supersonic range, to low-pressure regions such as high Knudsen number flows and Martian wind tunnels, and to cryogenic wind tunnel measurements. In order to create a PSP suitable for each experimental condition, it is necessary to consider the characteristics of the pressure-sensitive dye, binder, and particles. This paper discusses the characteristics of dyes, polymers, and particles required for PSPs for steady-state measurements, for cryogenic wind tunnel measurements in low-temperature and low-oxygen environments, and for unsteady measurements. The key points for developing PSPs with these characteristics are also discussed.