Reproduction of detonation parameters of mixtures of tetranitromethane with methanol and nitrobenzene

Structure of detonation waves in mixtures of tetranitromethane with methanol and nitrobenzene is studied using a multipoint laser interferometer. There is a poor reproducibility of the mass velocity profiles measured in different experiments with a fixed composition of mixtures. Simultaneous registration of wave profiles at several points of the detonation front and different sections of the sample showed that in this case the flow is one-dimensional and stable with respect to longitudinal perturbations. This means that in each experiment a stationary detonation mode is realized, the parameters of which differ from experiment to experiment. Along with the lack of reproducibility of the mass velocity profiles, nonclassical detonation modes were recorded in the mixtures under study, which are manifested in the absence of a chemical peak in the reaction zone. A possible relationship between these two phenomena is discussed.