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Investigations of secondary explosions induced by venting
Author(s) -
Chen Zhihua,
Fan Baochun,
Jiang Xiaohai,
Ye Jingfang
Publication year - 2006
Publication title -
process safety progress
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.378
H-Index - 40
eISSN - 1547-5913
pISSN - 1066-8527
DOI - 10.1002/prs.10139
Subject(s) - shadowgraph , ignition system , overpressure , duct (anatomy) , equivalence ratio , combustion , propellant , environmental science , mechanics , materials science , nuclear engineering , engineering , chemistry , aerospace engineering , physics , thermodynamics , organic chemistry , pathology , medicine , combustor
A series of vented explosion tests were performed in a small‐scale cylindrical vessel using a short discharge duct. Overpressure–time profiles were recorded with five transducers both inside and outside of the vessel. Visualization of the flow field is provided by a high‐speed shadowgraph imaging system using sequential shadowgraphs. As is well known, two or more pressure peaks can occur during explosion venting, one from the vent rupture and the other from a secondary explosion induced by combustion of the vented combustible gases. Three typical distinct processes of vented explosions were found. Variations in intensity of the secondary explosion were measured as a function of vent burst pressure, ignition location, blockage ratio at the vent, and equivalence ratio of the fuel. © 2006 American Institute of Chemical Engineers Process Saf Prog, 2006