25 October 2016 Research on infrared radiation signatures of high-altitude plume based on DSMC method
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Proceedings Volume 10157, Infrared Technology and Applications, and Robot Sensing and Advanced Control; 101570D (2016); doi: 10.1117/12.2244158
Event: International Symposium on Optoelectronic Technology and Application 2016, 2016, Beijing, China
Abstract
Exhaust plume flow field have the characteristics of high temperature, high speed and multi-species flow. Exhaust plume infrared signal are important basis of diagnosing, detecting and identifying plume spectrum. This paper focuses on the infrared radiation characteristics of high-altitude plume. The plume flows exhausted from a micro-nozzle of a low-thrust engine at high-altitude have been simulated numerically through using a DSMC method. Both the properties of plume flow at high altitude and the non-equilibrium effect related to rarefied gases are analyzed. Results are given numerically in good agreement with high-altitude plume observations. With the fields of pressure, temperature and main components of the exhaust plume as input data, the line-by line method was used to calculate the 2~5μm infrared spectral radiation properties of the plume. Different flight conditions are considered to analyze the influence on the infrared radiation characteristics. Some interesting conclusion are finally achieved.
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Xingdong Bao, Hongxia Mao, Jie Wu, Yanbing Dong, "Research on infrared radiation signatures of high-altitude plume based on DSMC method", Proc. SPIE 10157, Infrared Technology and Applications, and Robot Sensing and Advanced Control, 101570D (25 October 2016); doi: 10.1117/12.2244158; https://doi.org/10.1117/12.2244158
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KEYWORDS
Infrared radiation

Monte Carlo methods

Infrared signatures

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