Data Processing of Pressure-Sensitive Paint for Industrial Wind Tunnel Testing

Data processing methods for pressure-sensitive paint measurement in industrial wind tunnels are discussed in this paper. Key tasks are to shorten the processing time and to improve the accuracy of data. To complete data processing within a limited time frame, it has to be performed as continuously and automatically as possible. The methods to promote automation of the data processing are discussed. Solving an issue of temperaturedependency of pressure-sensitive paint is indispensable for enhancing accuracy of data. Two approaches to compensate for the temperature-dependency, i.e. a-priori method and temperature-corrected in-situ method, are applied in this study. As the result, processing time has been shortened by solving problems preventing automation of image registration process. The PSP data processed by both a-priori method and temperature-corrected in- situ method showed reasonable agreement with the pressure tap data measured by pressure transducers, indicating the validity and accuracy of the present data processing methods.