Thermal Interaction of Two Flame Fronts Propagating in Channels with Opposing Gas Flows

Abstract

A one‐dimensional nonstationary model is presented for propagation of two premixed flame fronts in narrow plane channels with regard for thermal interaction of flames through a dividing wall. The gas flows in channels considered are oppositely directed and equal in magnitude. It is shown that heat transfer through the heat‐conducting wall separating the plane channels leads to the appearance of a number of special features. The scheme of filtrational combustion of gases considered may be called the scheme of combustion with counter filtration; it is a new modification of systems with enthalpy excess. It is shown that the temperature at the combustion‐wave front may be greater than the adiabatic temperature of free plane flame with the same composition of the combustible mixture even if there are heat losses through external walls of the system. By solving the problem, dependences of the velocity of combustion waves on the distance between them are obtained, and the dynamic behavior of combustion waves is studied. The region of problem parameters, where self‐stabilization of combustion waves is possible, is found.