Sun JH, Dobashi R, Hirano T (2006) Structure of flames propagating through aluminum particles cloud and combustion process of particles. Journal of Loss Prevention in the Process Industries 19(6), 769-773. [In English]

Web link:http://dx.doi.org/10.1016/j.jlp.2006.01.002

Keywords:

metal dust explosion, structure of flame, aluminum particles cloud, combustion process, dust explosions, profile,

Abstract: Structure of flames propagating through aluminum particles clouds and combustion processes of the particles have been examined experimentally to understand the fundamental behavior of a metal dust explosion. The combustion process of individual aluminum particles in a flame propagating through the aluminum particles cloud has been recorded by using a high-speed video camera with a microscopic optical system, and analyzed. The flame is shown to be consisted of a preheat zone of about 3 mm thick, followed by a combustion zone of 5-7 mm thick. In the combustion zone, discrete gas phase flames are observed around each aluminum particle. Also an asymmetric flame around a particle is observed, which might be caused by an ejection of aluminum vapor from a crack of oxide shell surrounding the particle. (C) 2006 Elsevier Ltd. All rights reserved.