针对三维Y型微通道内的非预混催化燃烧，选择GRIMech 3.0气相反应机理与Deutschmann表面催化机理开展了数值模拟研究,分析铂催化剂涂覆位置、催化剂涂覆面积等因素对通道内特殊“火焰街”现象的影响。结果表明：通道内壁面涂覆一定面积的铂催化剂可以显著改善燃烧器性能，提升其甲烷转换率以及燃烧效率；相较于内壁面催化剂全涂覆或通道后段局部涂覆的情况，当催化剂仅涂覆于通道前段局部时，甲烷转化率与燃烧效率的提升幅度达到最大，分别为3.5%与7%。

Aiming at nonpremixed catalytic combustion in a threedimensional Yshape microchannel, the numerical simulation study was carried out by using GRIMech 3.0 gasphase reaction mechanism and Deutschmann surface catalytic kinetics. The effects of Pt catalyst coating positions, areas, etc. on the characteristics of the unique combustion phenomenon "flamestreet" in the channel were analyzed. The results show that the burner performance in terms of the methane conversion rate and combustion efficiency, can be significantly improved by coating a certain area of Pt catalyst on the inner walls of channel. In addition, when the catalyst is partially coated on the front portion of the channel walls, the enhancement of the methane conversion rate and combustion efficiency can reach their maximum values by 3.5% and 7%, respectively, which are better than the conditions of fullycoated or partially rearcoated walls.

TK221

国家自然科学基金（51806158）