Experimental investigation on static/dynamic characteristics of a fast-response pressure sensitive paint |
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Authors: | Ruiyu LI Limin GAO Tianlong ZHENG Guanhua YANG |
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Institution: | 1. School of Power and Energy, Northwestern Polytechnical University, Xi''an 710072, China;2. Collaborative Innovation Center of Advanced Aero-Engine, Beijing 100083, China |
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Abstract: | An optical-based technique using Pressure-Sensitive Paint (PSP) is a promising method to measure the distribution of surface pressure on an aerodynamic model. The static and dynamic characteristics of a fast-response PSP that is developed in the Chinese Academy of Sciences (CAS) are analyzed and tested to serve as the basis for experiments on unsteady surface measurement using a fast-response PSP. Two calibration systems used for this study are set up to investigate the temperature dependency, response time, and resolution. A data processing method, used for dynamic data, is analyzed and selected carefully to determine the optimum signal. Results show that the fast-response PSP can be used normally at temperatures from 25?°C to 80?°C. The effect of temperature on the accuracy of the measurement must be considered when temperatures are beyond the temperature range of 30–40?°C. The dynamic calibration device with a solenoid valve can achieve a pressure jump within a millisecond order. The resolution is determined by the signal-to-noise ratio of the photo-multiplier tube. Results of the measurement show that the response time of the PSP decreases with a large pressure variation, and the response time is below 0.016?s when the pressure variation is under 40?kPa. |
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Keywords: | Dynamic calibration Pressure measurement Pressure sensitive paint Signal processing Unsteady flow |
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