Аннотация:Abstract—The electrohydrodynamic (EHD) structure of flow of a high-temperature partially ionizedchemically reacting gas mixture through in a plane channel is considered. The plume of hydrocarbonflame at the atmospheric pressure can be an example of such a flow. It is well known that thechemiionization 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 combustionzone. It is shown that in this case narrow zones of space electric charge (similar to the bipolar doublelayers) are formed in the neighborhood of the boundaries and the Coulomb forces that act on the behaviorof the burning medium appear here even in the absence of the external applied electric field. The regime ofcombustion in which the major part of the plume becomes positively charged is revealed.Keywords: high-temperature gas mixture, molecular gases, chemiionization, space electric charge,Coulomb force, electrohydrodynamicsDOI: 10.1134/S001546282260119X