对掺杂H2和CO2的二甲醚预混火焰进行研究，分析H2和CO2的化学效应对二甲醚燃烧火焰温度、主要产物、中间产物和自由基的耦合影响。结果表明，在10%H2条件下，CO2浓度越高，其化学效应对温度下降，二甲醚消耗，乙炔、甲醛、乙醛及H生成的抑制作用越强，对O、OH生成的促进作用也越强；H2的化学效应对温度升高和二甲醚燃烧的促进作用随CO2浓度升高而增强，对H生成的促进作用随CO2浓度升高而减弱，对O、OH、乙炔、甲醛及乙醛生成的促进作用与CO2浓度无关。

Kinetic analysis about coupled chemical effects of CO2 and H2 additions on laminar premixed dimethyl ether flames is performed. The coupled chemical effects of CO2 and H2 addition are analyzed on aspects of temperature, major species, intermediate stable species and radicals. The result shows that when H2 is added, the CO2 chemical effects, which can decrease the temperature, the DME oxidation, the production of C2H2, CH2O, CH3CHO and H radical but promote the production of O and OH radicals, would varies directly with the CO2 concentration. However, CO2 addition can strengthen the H2 chemical effects on increasing the temperature and DME consumption, but mitigate the H2 chemical effects on reducing the H mole fraction. And the CO2 concentration did not have obvious influence on the H2 chemical effects on increasing the production of O, OH, C2H2, CH2O and CH3CHO.