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采用自行设计的标定装置对压力敏感涂料进行了标定实验,研究了激励光源光强、温度两种参数对标定曲线的影响.结果表明:当激励光源光强能够使得光敏分子发生氧猝熄条件下,激励光源光强对标定曲线的影响可以忽略不计;标定曲线对温度变化较为敏感.据此提出了采用二维插值方法得出发射光强关于压力比、温度比的表达式,从而对测量结果进行温度修正.在此基础上,将压力敏感涂料测试技术分别应用于圆柱孔、扇形孔气膜冷却效率的测量中,所得实验数据与前人结果符合较好.
The self-designed calibration device was used to calibrate the pressure-sensitive coatings, and the effects of the intensity and the temperature of the excitation light source on the calibration curves were studied. The results show that when the light intensity of the excitation light source can make the photosensitive molecules quench under oxygen , The influence of the intensity of excitation light source on the calibration curve can be neglected, and the calibration curve is sensitive to the temperature variation.Accordingly, a two-dimensional interpolation method is proposed to obtain the expression of the emission intensity on the pressure ratio and the temperature ratio, Temperature correction.On this basis, the pressure-sensitive coating test techniques were applied to the measurement of the cooling efficiency of the cylindrical hole, fan-shaped film, the experimental data in line with previous results in good agreement.