Experimental and Simulation Study on Energy Release of Extended Sources Influenced by Atmospheric Pressure Variation

Authors

• Kai Guo, Unmanned System Research Institute, Northwestern Polytechnical University, Xi'an 710000, China; Academy of Opto-Electronic, China Electronic Technology Group Corporation (AOE CETC), Tianjin 300308, China
• Feiyu Zhao, Academy of Opto-Electronic, China Electronic Technology Group Corporation (AOE CETC), Tianjin 300308, China
• Hao Zhang, Academy of Opto-Electronic, China Electronic Technology Group Corporation (AOE CETC), Tianjin 300308, China
• Liang Wang, Academy of Opto-Electronic, China Electronic Technology Group Corporation (AOE CETC), Tianjin 300308, China
• Kai Zhang, Unmanned System Research Institute, Northwestern Polytechnical University, Xi'an 710000, China

Abstract

To investigate the energy release characteristics of extended sources in low-pressure environments, a combined experiment and simulation approach was adopted. Four typical altitudecorresponding pressures were selected as experimental conditions. An infrared thermal imager was employed to monitor parameters such as combustion temperature, radiance, and combustion area during the combustion process of the extended source. When the pressure decreases from 101 kPa to 30 kPa, the ignition time of the extended source doubles; the total energy release attenuates by 44.78%, and the combustion area reduces by 45.95%, but the fluctuations of peak temperature and average temperature are less than 3%, which indicates that the extended source maintains thermodynamic equilibrium by adjusting the infrared scale rather than the radiance. A simulation model was established based on heat and mass transfer governing equations and porous medium diffusion theory. The maximum error between the calculated results and experimental data is less than 13.07%, which verifies the reliability of the simulation model in predicting results within a wide range of pressure variation. The research results explain the energy release characteristics and variation laws of corresponding parameters of the extended source combustion system under different pressure states, providing support for the application and design optimization of extended sources in typical environments.

Recommended Citation

Guo, Kai; Zhao, Feiyu; Zhang, Hao; Wang, Liang; and Zhang, Kai (2026) "Experimental and Simulation Study on Energy Release of Extended Sources Influenced by Atmospheric Pressure Variation," Journal of System Simulation: Vol. 38: Iss. 6, Article 21.
DOI: 10.16182/j.issn1004731x.joss.25-1109
Available at: https://dc-china-simulation.researchcommons.org/journal/vol38/iss6/21

First Page

1761

Last Page

1770

CLC

TN972+.4; TP391

Recommended Citation

Guo Kai, Zhao Feiyu, Zhang Hao, et al. Experimental and Simulation Study on Energy Release of Extended Sources Influenced by Atmospheric Pressure Variation[J]. Journal of System Simulation, 2026, 38(6): 1761-1770.

Corresponding Author

Zhang Kai

DOI

10.16182/j.issn1004731x.joss.25-1109