چكيده به لاتين
Humans' needs for energy have always been considered from the distant past to the present so today the supply of clean and renewable fuel for energy production is one of the main concerns of communities, governments, and industry managers. In the present dissertation, the combustion behavior of organic Lycopodium fuel, solid iron metal fuel, and Lycopodium-iron dual fuel, considered renewable and relatively clean energy sources is investigated. In this research, to have a more accurate evaluation of the combustion behavior of each of the organic and metallic fuels, firstly they have been studied separately, and then, while familiar with their combustion mechanism, the Lycopodium-iron dual fuel has been investigated. At first, the investigation of the dynamic combustion behavior of a single iron particle is considered, and then an analytical model for premixed combustion of iron nanoparticles, considering different areas of preheating, melting of iron oxide, melting of iron, and post flame is suggested. The combustion of Lycopodium dust cloud, as another energy carrier, by including the drying processes, the two-step pyrolysis, and the reaction of these particles, is developed. Next, by adding a little iron fuel to the Lycopodium fuel, the asymptotic structure of combustion of the lean pre-mixed dual fuels is modeled based on the models of these two pure fuels. The results show that adding 30% of iron fuel to pure Lycopodium fuel causes the flame propagation velocity to increase significantly so that the flame propagation velocity increases from 0.14 m/s for pure Lycopodium fuel to 1.86 m/s for dual fuels. Finally, with the proposed models for dual nanoparticle fuels, flame oscillations due to introduced forced external perturbation to the velocity field, the combustion behavior at the edge flame, and the trajectory of Lycopodium and iron nanoparticles are determined during the combustion reaction.
