Effects of dust dispersibility on the suppressant enhanced explosion parameter (SEEP) in flame propagation of Al dust clouds

2021 ◽  
Vol 404 ◽  
pp. 124119
Author(s):  
Yajie Bu ◽  
Paul Amyotte ◽  
Chang Li ◽  
Wenbo Yuan ◽  
Chunmiao Yuan ◽  
...  
Keyword(s):  
Flame Propagation ◽  
Dust Clouds ◽  
Explosion Parameter

scholarly journals AN EXPERIMENTAL STUDY ON FLAME PROPAGATION IN CORNSTARCH DUST CLOUDS

2006 ◽  
Vol 178 (10-11) ◽  
pp. 1957-1975 ◽  
Author(s):  
SHUANGFENG WANG ◽  
YIKANG PU ◽  
FU JIA ◽  
ARTUR GUTKOWSKI ◽  
JOZEF JAROSINSKI
Keyword(s):  
Experimental Study ◽  
Flame Propagation ◽  
Dust Clouds

Flame propagation through dust clouds of carbon, coal, aluminium and magnesium in an environment of zero gravity

1983 ◽  
Vol 385 (1788) ◽  
pp. 21-51 ◽  
Keyword(s):  
Particle Size ◽  
Heat Loss ◽  
Flame Propagation ◽  
Burning Velocity ◽  
Dust Cloud ◽  
Volatile Matter ◽  
Dust Particles ◽  
Zero Gravity ◽  
Radiation Heat Loss ◽  
Dust Clouds

The mechanism and the rate of flame propagation through dust clouds of carbon, coal, aluminium and magnesium have been investigated. Any errors due to the upward buoyant motion of burnt gases and the downward settling velocity of dust particles were eliminated by conducting these experiments in a zero-gravity environment. A technique of flat-flame propagation was developed to measure the burning velocity accurately. The results show that the burning velocity is influenced by particle size, fuel transfer number, dust concentration, volatile matter (for coal), oxygen enrichment and heat loss by radiation from the burning fuel particles. A simple model to elucidate the structure and the mechanism of flame propagation is developed. Then expressions to predict the flame thickness and the burning velocity are derived. Attention is drawn to the similarity that exists between the mechanisms of flame propagation through dust clouds and through fuel mists. The importance of radiation heat loss is emphasized. It is shown that for a dust cloud of particle size 10 μ m of graphite or aluminium in oxygen, radiation loss from particles can reduce the burning velocity by as much as 40% or 25% respectively.

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