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24 November 2021 Study on visible light radiation performance of pyrotechnic composition in vacuum
Yanan Li, Yichun Cui, Zefeng Guo, Hua Guan, Lu Gao
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Proceedings Volume 12062, AOPC 2021: Optoelectronics and Nanophotonics; 1206209 (2021) https://doi.org/10.1117/12.2603910
Event: Applied Optics and Photonics China 2021, 2021, Beijing, China
Abstract
Based on Mg/Na (NO3) 2 and Mg/Sr (NO3) 2, the combustion and radiation characteristics of pyrotechnics in vacuum were studied. The burning rate and visible light radiation characteristics of different samples were obtained, and the relationship between combustion performance (visible light intensity and burning rate) of the sample and vacuum environment pressure were further obtained. The results show that: 1) the linear burning rate and mass burning rate of the two formulations decrease with the decrease of pressure, and the burning rate has an exponential relationship with the pressure, and the sensitivity of Mg/Sr (NO3) 2 to ambient pressure is slightly higher than that of Mg/Na (NO3) 2; 2) Under the same vacuum pressure, the visible radiation intensity of Mg/Sr (NO3) 2 is significantly higher than that of Mg/Na (NO3) 2; 3) With the decrease of vacuum pressure, the visible light radiation intensity of the two formulations of pyrotechnic composition decreased. 4) According to the test data, the light intensity pressure index of Mg / Na (NO3) 2 is 1.07, which is more sensitive to environmental pressure than that of Mg/Sr (NO3) 2 system 0.598; 5) Based on the fitting formula, it is estimated that the visible light radiation intensity of Mg/Na (NO3) 2 system is 16cd, which is much less than that of Mg/Sr (NO3) 2 system 443cd.
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Yanan Li, Yichun Cui, Zefeng Guo, Hua Guan, and Lu Gao "Study on visible light radiation performance of pyrotechnic composition in vacuum", Proc. SPIE 12062, AOPC 2021: Optoelectronics and Nanophotonics, 1206209 (24 November 2021); https://doi.org/10.1117/12.2603910
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KEYWORDS
Combustion
Visible radiation
High speed photography
Infrared radiation
High speed cameras
Light
Magnesium
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