Mechanism of the Phenomenon of Negative Erosion during the Unsteady Combustion of Energetic Materials
Over the last 60 years, a considerable amount of time and money has been spent improving our understanding of combustion instability in solid rocket propulsion systems. Research of the processes of non-stationary burning and anomalies of burning of the energetic materials (EM) opens essentially new possibilities for improvement of existing theories of burning of the EM. In real solid propulsion systems, combustion normally occurs under conditions of blowing, i.e., with motion of a hot combustion products (CP) along the burning surface of the EM. The phenomenon of reduction of the burning rate as a result of blowing of the solid propellant burning surface with low velocity of the CP of the same composition refers to as the effect of “negative erosion. The phenomenon of “negative erosion is one of typical anomalies of burning. Understanding of the mechanism of the phenomenon of “negative erosion is important from the point of view of formation of correct representations about fundamental laws of burning of the EM. Suggested new concept of the phenomenon of “negative erosion is developed on the basis of the Universal Concept of the spatial-periodic micro-structures excitation on the EM burning surface. All previous theoretical concepts did not take into account existence of pulsating micro-torch structures on the EM burning surface. Earlier it was assumed, that the phenomenon of “negative erosion is exclusively gas-dynamics effect, which has not been connected with the processes in the liquid-viscous layer of the burning solid propellant. “Wandering micro-torches on the burning surface causes excitation of the micro-vortex cells-periodic toroidal vortex micro-structures. This phenomenon is observed in the conditions of low pressure when the spatial-periodic micro-structures on the burning surfaces and the micro-torch structures have the maximal size. The mechanism of the phenomenon of “negative erosion is a mechanism of destruction of self-organised toroidal vortical structures over the burning surface, excited by the torch micro-structures on the burning surface. The boundary of existence of the phenomenon of “negative erosion is determined by stability of toroidal-shaped vortex micro-structures in the stream of the CP which is blowing the burning surface of the EM.
solid propulsion systems energetic materials combustion instability burning surface phenomenon of “negative erosion liquid-viscous layer
LUKIN Alexander
Western-Caucasus Research Center, Bldg. 9, Tupik Zvezdniy, Tuapse, RU 352808, Krasnodar Territory, Russian Federation
国际会议
2009 International Autumn Seminar on Propellants,Ezplosives and Pyrotechnics(2009国际推进剂、炸药、烟火技术秋季研讨会)
昆明
英文
1-6
2009-09-22（万方平台首次上网日期，不代表论文的发表时间）