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http://dx.doi.org/10.9713/kcer.2011.49.1.041

Characteristics of Flames Propagating Through Combustible Particles Concentration in a Vertical Duct  

Han, Ou-Sup (Chemical Hazard Research Team, Center for Chemical Safety and Health, Occupational Safety & Health Research Institute (KOSHA))
Han, In-Soo (Chemical Hazard Research Team, Center for Chemical Safety and Health, Occupational Safety & Health Research Institute (KOSHA))
Choi, Yi-Rac (Chemical Hazard Research Team, Center for Chemical Safety and Health, Occupational Safety & Health Research Institute (KOSHA))
Lee, Jung-Suk (Chemical Hazard Research Team, Center for Chemical Safety and Health, Occupational Safety & Health Research Institute (KOSHA))
Lee, Su-Hee (Chemical Hazard Research Team, Center for Chemical Safety and Health, Occupational Safety & Health Research Institute (KOSHA))
Publication Information
Korean Chemical Engineering Research / v.49, no.1, 2011 , pp. 41-46 More about this Journal
Abstract
We investigated experimentally the properties of dust explosion through lycopodium particle clouds in a duct to provide the fundamental knowledge. Propagating dust flames in the vertical duct of 120 cm height and 12 cm square cross-section were observed by digital video camera and flame front is visualized using by PIV(Particle Image Velocimetry) system. As the result, when the same average dust concentration existed in the vertical duct, downward flame propagation was faster than the upward flame propagation, its rate increased with dust concentration in 300g/$m^3$. Post flames were caused by the ignition of unburned particles which flowed into the rear region of flame from passage between flame and duct wall, and they generated regardless of duct condition. Also, it was found that appearance frequency of post flames during dust flame propagations increased with the increase of dust concentration.
Keywords
Transfer Duct; Dust Explosions; Flame Propagation; Post Flames;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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