抄録
A new approach to correct for the temperature effect on Pressure-Sensitive Paint (PSP) is proposed. This method, what we call Non PSP, consists of a PSP film covered with an oxygen-barrier layer. The resulting film acts like temperature-sensitive paint. Two types of barrier polymers, poly-vinyl alcohol and poly acrylic acid, were evaluated in this study. It was found that those barrier layers could cancel the pressure sensitivity of PSP and enhance the temperature sensitivity. To validate the performance of Non PSP for temperature correction of PSP measurement, a supersonic jet impingement test has been performed. Using PSP/Non-PSP combination, pressure and temperature fields on a flat plate induced by a jet could be visualized simultaneously. However, the paint-derived data showed a residual error in pressure, indicating that the factors like hysteresis and humidity had an effect on the response of Non PSP to pressure.
