0908 Development of Measurement Technique at Low-speed Flow Fields using Pressure Sensitive Paint

Abstract

Pressure sensitive paint (PSP) is a useful measurement tool to visualize pressure distribution on solid surface in EFD, and application of PSP to analysis of complex pressure distribution in turbo machinery is strongly desired. However, it is difficult to apply PSP to low-speed flow fields with small different pressure, because PSP is a sensor of absolute pressure. Therefore, we have optimized the concentration of luminophore and the polymer binder to improve the pressure sensitivity around atmospheric pressure. We have applied the PSP technique to measurement of surface pressure of a plate interacting with a jet, and visualized the pressure difference of 200Pa on the plate. The calibration technique to correct the temperature effect of PSP is also mentioned, because the temperature sensitivity of PSP is significant for pressure measurement by PSP, especially in flow fields with small gauge pressure.