Abstract
Extinction stretch rates of premixed counterflow flames of DME/air mixtures were numerically and experimentally investigated. The extinction stretch rate of the DME fuel showed the intermediate value between those of CH_4 and C_2H_4 fuels. This experimental result did not coincide with numerical simulation with full chemical kinetics of DME reactions. The extinction of DME/air flame occurred when the local Kalrovitz number (Ka^L) evaluated from the local burning velocity and the local flame thickness of the stretched flame became almost unity as the same as other hydrocarbon fuels.
