The distribution of excess charges in the diffusion flame of hydrocarbons

Abstract

The paper discusses the experimental investigation results of the potentials distribution (probing) and the excess charges in diffusion flames of propane and polymers - PMMA (polymethyl methacrylate) and divinyl rubber. The study of the excess charges distribution was made by analysis of flame deformation in the presence of an external lateral electrostatic field. The existence and the accumulation of excess charges in the flame are generally explained on the basis of consideration of the interaction processes of condensed phase particles and charges (electrons) generated during combustion in the presence of a dusty plasma. However, this mechanism does not give the opportunity to consider the sign and magnitude of the excess charges distribution in the flame, depending on the products composition and the value of the oxidant excess. It is unclear how oppositely charged immiscible streams of flame are formed and coexist.