Computational Study of Premixed Flame Propagation in Micro-Channels with Nonslip Walls: Effect of Wall Temperature

This investigation evaluates the propagation of premixed flames in narrow channels with isothermal walls. The study is based on numerical solution set fully-compressible, reacting flow equations that includes viscosity, diffusion, thermal conduction and Arrhenius chemical kinetics. Specifically, pipes one extreme open closed are considered such a flame sparked at propagates towards one. channel walls kept multiple constant temperatures range from Tw=300 K to 1200 K. impact these dynamics studied for radii (R) various expansion ratios (?), which approximate behavior different fuel mixtures system. also compared adiabatic walls, were previously found produce exponential acceleration initial stage burning process. results show heat losses prevent strong lead much slower as ones. Four distinctive regimes have been identified ??Tw?R space: (i) extinction; (ii) linear acceleration; (iii) steady or near-steady propagation; (iv) oscillations. physical processes each discussed, corresponding regime diagrams presented.