Abstract
Pressure sensitive paint (PSP) is a useful noncontact measurement tool to obtain continuous pressure distribution on solid surfaces. Application of PSP to analysis of complicated flow field in turbomachinery is strongly desired. However, low pressure sensitivity for low-speed flow fields and temperature dependence of PSP makes significant error for pressure measurement, especially for application of PSP to turbomachines with small pressure rise. In this research we applied dual-layer PSP/TSP to measurement of surface pressure of the suction surface of a propeller fan rotor, and compensated for the temperature dependence of PSP using temperature distribution map obtained by using TSP. Moreover, we clarified the change of irradiation light intensity distribution, which is caused by deformation of propeller fan rotor surface, produce significant source of error in pressure measurement. We propose the method to compensate for the change of irradiation light intensity distribution in addition to the nonuniform temperature distribution, and verify the compensation effect.
