压力敏感涂料及其测量技术

 压力敏感涂料(PSP)测量技术是20世纪80年代发展起来的光学压力测量技术，以其非接触测量方式、真实反映实验物体表面连续的压力分布变化、高的空间分辨率及其节约时间与良好的经济效益等突出优势，在国外得到了广泛的工程应用。本文基于空气动力实验中压力测量的基本要求， 概括地介绍了发光氧猝灭的PSP的工作原理、其测量技术的特点和技术发展现状，阐述了PSP的基本组成、分类标准及种类，对比分析了基于光强和基于寿命的测量方法在实验测量中的优势与不足，并就未来PSP及其测量技术的发展前景进行了讨论。介绍了近十年来国内应用PSP测量技术在低速、高速风洞中对机翼表面压力分布和单叶片在高亚声速平面叶栅风洞和对转压气机出口导流叶片吸力面的实验测量,与测压孔测量结果比较,均取得满意的工程应用效果。

Pressure-sensitive Paint and Its Measuring Technique

Based on the oxygen quenching of luminescence, pressure sensitive paint (PSP) technique is an optical pressure measurement method, which has been developed since the 1980' s. This technique has found wide application abroad in engineering practice, based on its unique advantages of non-contact and full-field surface pressure measurement for experimental object, a much higher spatial resolution, a lower cost and being timesaving. According to the elementary demands on pressure measurement in aerodynamics, the working principle, features of PSP technique and its-engineering development are briefly presented. Moreover, the PSP composition, criterion for PSP assortment and sorts of PSP are described in detail. The comparison and analysis of advantages and weaknesses of PSP technique for both intensity-based and lifetime-based methods are conducted; the development tendency of PSP technique in the near future is also discussed. Especially within the recent ten years in China, the progress in pressure distribution measurements by using PSP technique on wing surface of airplane model in low speed and high speed wind tunnels, on vane surface of air-turbine in subsonic cascade wind tunnel, and on the guide vane of axial counter-rotating compressor is introduced in this review. The results show that compared with pressure tape measurement method, PSP technique has sufficient accuracy and reproducibility for its engineering application.