The Detonation Velocity of Solid Explosives Contained in Long Cylindrical Tubes of Varying Weight
Ministry of Home Security London United Kingdom
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The Chapnan-Jouguet theozy of the detonation of gases contained in rigid tubes has been applied by many authors to the detonation of solid explosives. Calculations by A. Schmidt, R. Becker, Langweiler, and more recently Kistiakowsky and Wilson, have used the theoiy in an inverted sense to calculate from the observed detonation velocities the covolumes of the gases formed in the detonation process. In the earlier calculations of A. Schmidt and Langweiler the covolumes so determined seemed to bear little relation to the actual size of the molecules. Kistiakowsky and Wilson, however, using a more flexible form for the equation of state, obtain values which, reduced to room temperature, are not incanpatible with the b of van der Waals equation as determined at ordinary pressures. A practical aim of these calculations is the prediction of the detonation velocity of possible new explosives. Applied to explosives which detonate with the developnent of very high temperatures these calculations, regarded from this practical standpoint, have considerable success they fail completely when applied to ammonium nitrate or similar explosives, always predicting with the covolumes determined from other explosives a velocity far in excess of the observed value.