Abstract
Super-rich laminar premixed flat flame of dimethyl ether (DME) have been investigated to elucidate the governing mechanism for the highly floating slow velocity flame. A blue flame is stabilized 60-70mm above the burner nozzle at equivalence ratio of 4.0-5.0. The burning velocity and temperature profiles are reasonably predicted by one-dimensional boundary problem solutions coupled with the detailed chemical kinetics model of DME oxidation. It was confirmed in the sensitivity analysis that the important reactions in the very rich flame are those of low-temperature mechanism so that the burning velocity is very weak function of equivalence ratio.
