MODELING THE BOUNDARY-LAYER AT A CORUNDUM WALL IN A FLUX OF PROPANE-AIR COMBUSTION PRODUCTS WITH ADDED POTASSIUM - THEORY AND EXPERIMENT

Experimental study and numerical modeling of a chemically nonequilibri um laminar boundary layer at a hot corundum sample in a flux of propan e combustion products in air with added potassium shows that the diseq uilibrium in the incoming flow has little influence on the distributio n of the components within the layer, given constant combustion condit ions. The influence of the boundary conditions at the wall and indeter minacy in the KO2 dissociation energy on this distribution is analyzed . A KO2 dissociation energy of 247 J/mole is recommended for use in th e calculations on the basis of analysis of experimental data. In deter mining the boundary conditions at the wall, it is taken into account t hat, even at 1700 K, the wall surface may only be regarded as partiall y catalytic for reactions with the participation of neutral molecular components.