关键词: 二甲醚；氢气；燃烧特性；绝热火焰温度；层流燃烧速度

Abstract: With the increasing severity of environmental pollution and the increasing energy crisis, the search for clean and renewable alternative fuels has become a research hotspot, and dimethyl ether and hydrogen have received extensive attention as alternative fuels with excellent performance. The laminar combustion characteristics of dimethyl ether-hydrogen-air premixed gas were numerically simulated by CHEMKIN Ⅱ, and the effects of hydrogen mixing on adiabatic flame temperature and laminar combustion rate of dimethyl ether-hydrogen-air premixed gas were analyzed. The results show that the adiabatic flame temperature and laminar combustion velocity of the mixture increase with the increase of the hydrogen mixing ratio in the mixture.With the increase of the equivalence ratio, the laminar combustion velocity and adiabatic flame temperature of the mixture increase first. The equivalence ratio corresponding to the adiabatic flame temperature and the maximum laminar combustion velocity increases gradually.

Key words: Dimethyl ether; Hydrogenation; Combustion characteristics; Adiabatic flame temperature; Laminar combustion rate