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INTERACTIONS BETWEEN SMALL PARTICLES AND PLASMA CONSIDERING CHEMICAL REACTIONS

机译：考虑化学反应的小颗粒与等离子体之间的相互作用

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The influence of chemical reactions on the interactions between a plasma jet and small particles (d_(s)<500 μm) has been investigated. The rate of particle temperature increase has been found based on the energy balance between the plasma and particles. Usually the following losses of energy are considered : a) radiation, b) melting, c) heating of vapor cloud, d) vaporization. However the chemical reactions can result in large correction in the balance of energy between the particles and plasma. Exothermic reactions are a new source of energy while endothermic ones result in an energy loss. The chemical reactions for particles at high temperature (when intensive evaporation takes place) occur in the boundary layer surrounding particles ; for particles with temperature close or below melting temperature - at the surface of particles. Addition of exothermic reaction energy to the particle energy balance is also strongly dependent on the gas flow rate controlling the amount of reactive gas in the boundary layer. This work presents the analysis of the influence of energy of chemical reactions on the energy balance in plasma-particle system.
机译：研究了化学反应对等离子流与小颗粒（d_（s）<500μm）之间相互作用的影响。基于等离子体与颗粒之间的能量平衡，发现了颗粒温度的升高速率。通常考虑以下能量损失：a）辐射，b）熔化，c）蒸气云加热，d）蒸发。但是，化学反应会导致粒子与等离子体之间的能量平衡发生较大的修正。放热反应是一种新的能量来源，而吸热反应则导致能量损失。高温下（发生强烈蒸发时）颗粒的化学反应发生在颗粒周围的边界层中。适用于温度接近或低于熔化温度的颗粒-在颗粒表面。放热反应能量加到颗粒能量平衡上也强烈取决于控制边界层中反应性气体量的气体流速。这项工作提出了对化学反应能量对等离子体粒子系统中能量平衡的影响的分析。

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