Temperature Correction of PSP Measurement for Low-Speed Flow Using Infrared Camera

Pressure-Sensitive Paint (PSP) system combined with an infrared (IR) camera has been developed at 2 m x 2 m low-speed wind tunnel at WINTEC/JAXA. The temperature correction of PSP was conducted using both temperature image acquired by the IR camera and wind-off images immediately after the wind tunnel shutdown. As a verification test, the pressure distribution on a supersonic transfer (SST) model was measured by the PSP/IR combined system. The measurement accuracy was fairly improved compared to the previous method, i.e., the temperature correction of PSP using only wind-off PSP images immediately after wind tunnel shutdown.