LAPSE:2021.0499
Published Article
LAPSE:2021.0499
Laser-Induced Ignition and Combustion Behavior of Individual Graphite Microparticles in a Micro-Combustor
Yue Wang, Minqi Zhang, Shuhang Chang, Shengji Li, Xuefeng Huang
June 10, 2021
Microscale combustion has potential application in a micro power generator. This paper studied the ignition and combustion behavior of individual graphite microparticles in a micro-combustor to explore the utilization of carbon-based fuels at the microscale system. The individual graphite microparticles inside the micro-combustor were ignited by a highly focused laser in an air flow with natural convection at atmospheric temperature and pressure. The results show that the ignition of graphite microparticles was heterogeneous. The particle diameter had a small weak effect on ignition delay time and threshold ignition energy. The micro-combustor wall heat losses had significant effects on the ignition and combustion. During combustion, flame instability, photophoresis, repetitive extinction and reignition were identified. The flame structure was asymmetric, and the fluctuation of flame front and radiation intensity showed combustion instability. Photophoretic force pushed the graphite away from the focal point and resulted in extinction. Owing to large wall heat loss, the flame quickly extinguished. However, the graphite was inductively reignited by laser.
Keywords
graphite, laser ignition, microscale combustion, photophoresis, repetitive extinction
Suggested Citation
Wang Y, Zhang M, Chang S, Li S, Huang X. Laser-Induced Ignition and Combustion Behavior of Individual Graphite Microparticles in a Micro-Combustor. (2021). LAPSE:2021.0499
Author Affiliations
Wang Y: Institute of Energy, Department of Physics, Hangzhou Dianzi University, Hangzhou 310018, China
Zhang M: Institute of Energy, Department of Physics, Hangzhou Dianzi University, Hangzhou 310018, China
Chang S: Institute of Energy, Department of Physics, Hangzhou Dianzi University, Hangzhou 310018, China
Li S: College of Materials and Environmental Engineering, Hangzhou Dianzi University, Hangzhou 310018, China [ORCID]
Huang X: Institute of Energy, Department of Physics, Hangzhou Dianzi University, Hangzhou 310018, China [ORCID]
Journal Name
Processes
Volume
8
Issue
11
Article Number
E1493
Year
2020
Publication Date
2020-11-19
Published Version
ISSN
2227-9717
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Original Submission
Other Meta
PII: pr8111493, Publication Type: Journal Article
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LAPSE:2021.0499
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doi:10.3390/pr8111493
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Jun 10, 2021
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CC BY 4.0
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Jun 10, 2021
 
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Calvin Tsay
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