Investigation of the EHD Structure of Flow of a High-Temperature Gas Mixture with a Non-Uniform Source of Charged Particles

The electrohydrodynamic (EHD) structure of flow of a high-temperature partially ionized chemically reacting gas mixture through in a plane channel is considered. The plume of hydrocarbon flame at the atmospheric pressure can be an example of such a flow. It is well known that the chemiionization reactions are the source of charged particles in the combustion processes. Clearly, there is a strong spatial inhomogeneity of the ionization source on the boundaries of the combustion zone. It is shown that in this case narrow zones of space electric charge (similar to the bipolar double layers) are formed in the neighborhood of the boundaries and the Coulomb forces that act on the behavior of the burning medium appear here even in the absence of the external applied electric field. The regime of combustion in which the major part of the plume becomes positively charged is revealed.