Abstract
Unsteady PSP technique to detect small unsteady pressure fluctuation is required to minimize its noise level and improve detection limit. One approach to update a high-speed camera, which had larger sensitivity, was investigated its performance to decrease the unsteady PSP measurement system noise. Two types of system tests, which were an AA-PSP sample test and a wind tunnel test using NACA0012 model, was conducted. Larger sensitivity camera could reduce noise floor and its factor was from 3 to 6. Detection limit using a larger sensitivity camera was 20Pa2 for the 10,240 images AA-PSP sample test and 3Pa2 for the 46,592 images wind tunnel test.
