Comitis, Spiros, Costas.2017-07-052017-07-051994http://hdl.handle.net/10539/22932A thesis submitted to the Faculty of Engineering, University of the Witwatersrand, Johannesburg, in fulfillment of the requirements for the degree of Doctor of Philosophy.A theoretical and experimental treatment of fire processes in fuel-Lined, ventilated passages is presented. Initially a radially well mixed axial flow condition is considered. Experiments are first performed in non-stratified flow conditions where fire propagation and gas temperature histories are acquired from liquid and solid fuelled fires. Theory and experiment;display transient fire propagation for typical duct fire scenarios where initial fuel mass Loading is constant with respect to duct length. ( Abbreviation abstract )enAir ducts -- Fires and fire prevention.Fire prevention -- Research.Flame spread.Combustion -- Research.Heat -- Transmission.Mine fires -- Research.Thesis