V. A photographic investigation of flame movements in carbonic oxide-oxygen explosions

Abstract

For some time past we have been investigating photographically the initiation and development of flame when a mixture of carbonic oxide and oxygen in combining proportions is exploded at atmospheric pressure under varying conditions, such as “dryness/ source and intensity of ignition, and under the influence of superimposed shock waves up to and including “ detonation.” In principle the method employed has been that originated nearly fifty years ago by Mallard and Le Chatelier in their classical 6 Recherches Experiinentales et Theoriques sur la Combustion des Melanges Explosives,’ published in 1883,* and subsequently further developed by H. B. D ixon and his collaborators in this country.f It consists essentially in recording on a sensitised plate or film, moving vertically at a known velocity, the movement of the flame along a horizontal glass tube, thus obtaining a graph compounded of the two velocities, from which that of the flame at any point can be deduced