Theoretical and Experimental Study of Gas-Solid Combustion in Turbulent Flow

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Abstract
–The main purpose of this work is to characterize the combustion of solids when a gaseous turbulent stream flows over the solid surface. The analytical treatment of this problem, which is a heat and mass transfer problem with chemical reaction in a boundary layer, is based upon the fact that the burning regime is diffusion controlled. A mathematical approach has been developed and applied to this model of combustion. The calculation of combustion rates, flame stand off distances, mass transfer numbers and different profiles in the boundary layer has been done using a Couette flow assumption. The experiments agree with the theoretical results over the range studied and with previous results. Two different systems have been studied, one representative of the conventional fire (oxygen-polyethylene), the other of the combustion of solid propellant (ammonium perchlorate-propane).

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