Lefebvre, A. H.2015-10-072015-10-071968-03http://dspace.lib.cranfield.ac.uk/handle/1826/9561The purpose of this note is to review some current theories of ignition in stagnant and flowing mixtures, and to present an alternative theory to describe the process that occurs in a turbojet combustion chamber when the engine is being relighted after a flame-out at high altitudes.enReport