Understanding of the Dissipative Cellular Microstructures Excitation Phenomena at the Energetic Materials Burning

摘要

For creation of new highly effective technologies and systems for suppression of the solid propulsion systems combustion instability, and also for optimal organization of the internal ballistics processes development in the solid propulsion systems during ignition-transient period are necessary to have detailed representations about unstable combustion mechanisms of the energetic materials (EM). Understanding the physical reasons for the existence of the dissipative cellular microstructures excitation phenomena at the EM burning has been the subject of many investigations in the last four decades. With experimental analysis of the cellular-pulsating burning phenomena, V.N.Marshakov (Semenov Institute of Chemical Physics of the Russian Academy of Sciences, Moscow, Russia) have convincingly shown that this phenomenon is general for EM. This phenomenon was discovered for all kinds of investigated substances - for gunpowders, solid rocket propellants (ballistite and composite) and explosives in all investigated range of burning conditions. Investigation of this phenomenon has allowed to find that in the thin liquid-viscous layer of the EM at heating from above occurs an interaction of the hydrodynamic, electric and thermal subsystems of the disordered system - the thermo-electric convection excitation. These mechanism can induce in the liquid-viscous layer the cellular movement that leads to the cellular-pulsating burning mode. Excitation is possible at any direction of heating, including heating of the liquid-viscous layer from above. Besides the velocity cells, in the liquid-viscous layer arise the electric field structures. Taking into account of the thermo-electric convection excitation phenomenon in the liquid-viscous layer of the burning EM and processes of self-organizing of the synergetic dissipative microstructures on the burning surface, are suggested the technology for suppression of the combustion instability. This technology allows to provide transformation and a regrouping of the electric field structures in the liquid-viscous layer of the burning EM and synergetic dissipative micro-structures on the burning surface.