Optical measurement techniques have evolved significantly in recent years. Pressure-Sensitive Paints (PSPs) are utilized to provide global surface pressure distributions in steady and unsteady flow. A Motion-capturing PSP method can capture the surface pressure distribution on transient motion objects such as rotating blades, while a conventional intensity method requires the separate measurement of a reference image. The motion-capturing PSP method was applied to a 400 [mm) diameter rotating blade spinning at 100 [Hz]. Time-resolved pressure distributions during the rotation were measured with a blade tip blur less than 10 [%] at 12,000 [fps].
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