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Title: Studies in dust flames
Author: Affleck, William Strickland
Awarding Body: University of London
Current Institution: Imperial College London
Date of Award: 1965
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An investigation has been carried out into the mechanism of propagation of small, laminar, coal-dust/air flames. New techniques for the preparation, handling and characterization of suitable dispersions of dust in air have been developed and are described. New methods for the study of dust flames are also noted. It has been shown that small flames burning Silkstone Coal are only stable in the presence of some form of hot-gas pilot. Apparatus has been devised to test the theory that such instability is the result of radiant heat loss from the flame. It has been shown that this is not the case. An inductive examination based on the calculation of adiabatic flame temperatures is described. Flame temperatures have been calculated on different theoretical models of the dust flame. It is shown that the propagation of the small coal-dust flame is controlled by the combustion of the volatile material liberated by the coal during pre-flame heating, and it is suggested that a stable flame can only result if the pattern of volatile evolution conforms to certain requirements. These observations are correlated with the experimental results of this and other investigations.
Supervisor: Burgoyne, J. H. Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available