基于寿命法的压力敏感涂料静/动态特性实验

压力敏感涂料测量技术在内外流表面压力测量方面具有独特的技术优势。涂料光谱特性及"传感器"特性的研究对于分析喷涂固化中环境差异等不可控因素的影响程度、检验拟用涂料配方特定试验的适用性具有十分重要的意义。为此，以一种在研的磷光压力敏感涂料为对象，基于自主研发的静态校准系统对发光寿命随压力与温度的变化规律进行了实验研究，通过对测量结果的拟合分析发现所用涂料的温度适用范围在30~60℃之间，且可进行温度敏感度修正；基于自主研发的高频动态压力光学校准系统对涂料在不同压力脉动频率下的涂料发光寿命峰峰值规律进行了实验研究，通过分析研究确定所用涂料基于发光寿命的截止频率上限为0.94 kHz。实验研究进一步验证了涂料特性静动态校准组合方法的可行性与有效性，为压力敏感涂料配方的研发及其应用拓展提供了重要的技术支撑。

Experiment on static/dynamic characteristics of fast-response pressure sensitive paint based on lifetime method

The pressure sensitive paint metrical technique has unique advantages in surface pressure measurements of internal and external flow fields. The study of spectral characteristics and "transducer" characteristics of paints is of vital significance for impact analysis of uncontrollable factors such as differences of surroundings in spraying and curing and applicability verification of specific tests for proposed paint formulas. Therefore, taking a phosphorescent pressure sensitive paint under research as the object, we conduct an experimental research on the variation law of luminescent lifetime with pressure and temperature based on a self-developed static calibration system. Fitting analysis of the measured results shows that the applicable temperature of the paint is between 30 ℃ and 60 ℃, which can be modified by temperature sensitivity. In addition, based on the self-developed high frequency dynamic pressure optical calibration system, the law of the pressure sensitive paint lifetime peak-to-peak values with different pressure pulsation frequencies is studied experimentally. Analysis ascertains that the cut-off frequency upper limit of the paint based on the luminescent lifetime is 0.94 kHz. The feasibility and effectiveness of the combination method for static and dynamic calibration of paint characteristics are further verified by experimental studies, providing important technical support for the research and development of pressure sensitive paint formulations and applications.