Effect of Flame-Wall Interaction on Local Heat Release of Methane and DME Combustion in a Side-Wall Quenching Geometry

This paper is focused on the characterization of local heat release rate and its correlation with flame structures under atmospheric conditions in a side-wall quenching geometry. The influence of different wall temperatures ranging from 330 K to 670 K is compared for stoichiometric and lean ( ϕ = 1.0 and 0.83) methane/air as well as dimethyl ether (DME)/air flames. Simultaneous formaldehyde (CH 2 O) and hydroxyl radical (OH) planar laser-induced fluorescence (PLIF) is used to determine relative local heat release rates (HRRs). Based on the resulting relative HRR distributions, flame front positions are determined and flame curvatures are evaluated. In the laminar flame configuration, for both fuel types at wall-distances y