高超声速快响应PSP测量技术研究进展

高超声速流动中普遍存在转捩、分离和激波–边界层干扰等复杂流动现象，会导致飞行器表面压力分布复杂且变化剧烈。压敏涂料（PSP）具有非接触、高空间分辨率以及全场测量等显著优势，是高超声速气动测试亟需的精细化测量技术。近年来，随着PSP响应速度的提升与测量方法的发展，其应用已逐渐由常规低速/高速风洞测试拓展至高超声速领域，在高速运动模型测试方面也取得了突破。本文介绍了快响应PSP测量技术的最新研究进展，结合两类典型的高超声速风洞以及一种相对特殊的自由飞弹道靶设备，分别探讨了PSP测量技术的挑战与对策，并展示了相关应用实例，最后对高超声速快响应PSP测量技术研究进行了展望。

Recent advances in hypersonic fast pressure-sensitive paint measurement technology

Complex flow phenomena such as transition, separation and shock-wave–boundary-layer interaction commonly exist in hypersonic flows, which lead to fast-changing and complicated surface pressure distributions. Pressure-sensitive paint（PSP） is a highly desired fine measurement technology in hypersonic aerodynamic testing, which has shown clear advantages such as non-intrusive, high spatial resolution and full-field measurement. In recent years, due to the enhancement of PSP’s response time and the development of measurement methods, the application of this technology has been expanded from regular low-speed/high-speed wind tunnel testing to the hypersonic field. Meanwhile, there are breakthroughs in high-speed moving model testing techniques. This paper first introduces the most recent research advances in the fast PSP measurement technology, and then discusses the challenges and countermeasures of PSP measurement based on application examples in two typical hypersonic wind tunnels and one relatively special free-flight ballistic range facility. Finally, the conclusion and outlook are given.