Employing one-dimensional approach to calculate mixture composition evolution caused by gas-phase reactions for the gas flowing through a cylindrical channel

Abstract Two approaches to evaluate the mixture composition with a small reactive admixture for the gas flowing through a cylindrical channel are compared. Both are based on solving the Navier-Stokes equations. In the first one, the Navier-Stokes equations are solved for the reacting gas mixture. In the second one, they are solved for non-reacting mixtures and gas-phase reactions are taken into account by solving the one-dimensional (along the flow axis) chemical kinetics equations. Comparison of the obtained results for CH 4 +H 2 mixture have shown the possibility of using of one-dimensional approach for correct description of the mixture composition evolution caused by gas-phase reactions.