LDV和PIV测速技术测量离心压气机内部流动的应用进展

离心压气机流场的精细测量对深入理解内部流动特征极其重要。传统的接触式流场测量技术存在空间分辨率低、堵塞效应严重、测量位置单一等缺陷，已经不能满足现代先进离心压气机的测量需求。激光多普勒测速技术（Laser Doppler Velocimeter，LDV）和粒子图像测速技术（Particle Image Velocimeter，PIV）作为两种典型的非接触式测量技术，具有测量精度高、适用范围广、非接触测量等特点，在离心压气机内部流场测量方面展现出巨大潜力。通过梳理国内外LDV和PIV测速技术测量离心压气机内部流动应用现状，介绍了LDV和PIV测速技术在离心压气机内流场测试方面的应用进展，着眼于试验方案、试验细节和技术难点，结合测量技术的未来发展趋势，从实际应用角度出发，对LDV和PIV测速技术在离心压气机内流场测量方面的应用进行了总结和展望。

Application progress of LDV and PIV in measuring flow in centrifugal compressor

The precise measurement of the centrifugal compressor flow field is very important to understand the internal flow characteristics. The traditional contact measurement technology has some defects, such as low spatial resolution, serious blockage effect, single measurement location and so on, which can not meet the measurement requirements of the modern advanced centrifugal compressor. Laser Doppler Velocimeter (LDV) and Particle Image Velocimeter (PIV) are two typical non-contact measurement technologies, which have the characteristics of high measurement accuracy, wide application range and non-contact measurement, showing great potential in the measurement of the internal flow field of the centrifugal compressor. By combing the application status of the LDV and PIV velocity measurement technology in measuring the internal flow field of the centrifugal compressor at home and abroad, the application progress of the LDV and PIV velocity measurement technology in measuring the internal flow field of the centrifugal compressor is introduced. Focusing on the experimental scheme, experimental details and technical difficulties, and combining with the future development trend of the measurement technology, the application of the LDV and PIV velocity measurement technology in the centrifugal compressor is discussed from the perspective of practical application. The application of internal flow field measurement is summarized and prospected.