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

GAO Limin; JIANG Heng; GE Ning; YANG Guanhua; CHEN Shun

doi:10.7527/S1000-6893.2020.24120

ACTA AERONAUTICAET ASTRONAUTICA SINICA >

2021 , Vol. 42 >Issue 3: 124120 - 124120

DOI: https://doi.org/10.7527/S1000-6893.2020.24120

Fluid Mechanics and Flight Mechanics

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

GAO Limin ,
JIANG Heng ,
GE Ning ,
YANG Guanhua ,
CHEN Shun

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1. School of Power and Energy, Northwestern Polytechnical University, Xi'an 710072, China;
2. National Key Laboratory of Science and Technology on Aerodynamic Design and Research, Xi'an 710072, China

Received date: 2020-04-22

Revised date: 2020-05-22

Online published: 2020-07-06

Supported by

National Natural Science Foundation of China (51790512); The 111 Project (B17037); MIIT; Seed Foundation of Innovation and Creation for Graduate Students in Northwestern Polytechnical University (ZZ2019018)

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Abstract

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.

Key words： pressure sensitive paints; pressure measurements; lifetime method; static characteristics; dynamic characteristics

Cite this article

GAO Limin , JIANG Heng , GE Ning , YANG Guanhua , CHEN Shun . Experiment on static/dynamic characteristics of fast-response pressure sensitive paint based on lifetime method[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2021 , 42(3) : 124120 -124120 . DOI: 10.7527/S1000-6893.2020.24120

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