COMBUSTION AND HEAT-TRANSFER INTERACTION IN A PORE-SCALE REFRACTORY TUBE BURNER

An axisymmetric two-dimensional model of chemical reaction and heat tr ansfer that accounts for the transport of mass, momentum, heat, and sp ecies in radial and axial directions has been developed to provide a f undamental understanding of the transport phenomena relevant to porous radiant burners made from ported ceramics. The passage geometry of pr actical porous media is modeled as a cylindrical tube in which combust ion takes place, This enables treatment of the chemical reactions and transport processes in the gas phase, of heat conduction in the tube w all, and of radiation exchange on the inside surface of the tube to ac count for the conjugate heat transfer effects. The predictions are com pared with available experimental data for the purpose of model valida tion. Parametric calculations are performed using the model to improve understanding of the phenomena.