Measurement of small-amplitude pressure fluctuation by a fast-responding pressure-sensitive paint

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A novel fast-responding pressure-sensitive paint (PSP) was developed to measure unsteady small-amplitude pressure fluctuation. This PSP was applied on arbitrary surfaces via spray coating A bi-lunimonophre paint was also developed to measure pressure and temperature simultaneously. We evaluated the measurement uncertainty of these paints by high-speed wind tunnel testing. This test reveals that the pressure with a few kHz fluctuations was successfully measured within 1kPa uncertainty.