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基于自行组建的PSP(pressure sensitive paint)测量系统,采用中国科学院化学研究所PSP,实验测量了来流马赫数分别为0.4和0.5时大弯角扩压叶栅叶片吸力面全域压力分布,并与传统测压技术所得结果进行了比较.研究结果表明:①采用PSP技术测量可以获得叶片表面全域的连续压力分布,具有空间分布率高、定量测量的特点;②叶片中部PSP测量压力值与压力扫描阀结果吻合得非常好,但受到叶片吸力面曲率的影响,叶片前缘与尾缘附近的误差较大,最大误差为4.48%;③随着来流速度的提高,PSP与压力扫描阀之间的误差逐渐减小.
Based on PSP (pressure sensitive paint) measurement system, a PSP system was used to measure the global pressure distribution on the suction surface of the large-angle compressor cascade when the Mach numbers were 0.4 and 0.5 respectively. The results of traditional manometry technology are compared. The results show that: (1) The PSP can be used to obtain continuous pressure distribution over the blade surface with high spatial distribution and quantitative measurement; (2) PSP measured pressure and pressure in the middle of blade However, the error between the leading edge and the trailing edge of the blade is large with a maximum error of 4.48% due to the curvature of the suction surface of the blade. With the increase of the velocity of the incoming flow, the pressure between the PSP and the pressure scanning valve The error is gradually reduced.