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在温度范围650～830 K,上止点压力1.94～2.45 MPa,当量比0.83～1.25,氮气稀释率89.74％实验条件下,本文利用快速压缩机(RCM)研究了掺氢比、当量比和上止点压力对DME/H2/O2/N2混合气着火延迟期的影响.利用CHEMKIN-PRO软件在更宽广温度范围内对混合气着火延迟进行了同等条件下的模拟计算.结果表明:随着掺氢比的增加,DME/H2/O2/N2混合气第一阶段着火延迟期变化不大,总着火延迟期延长;随着当量比及上止点压力的增加,混合气第一阶段着火延迟期变化不大,总着火延迟期逐渐缩短.“,”Effects of the hydrogen blending ratio,equivalence ratio and compressed pressure on the ignition delay time of DME/H2/O2/N2 mixture are investigated using a rapid compression machine (RCM) at compressed temperature of 650～830 K,compressed pressure of 1.94～2.45 MPa,equivalence ratio of 0.83～1.25 and nitrogen dilution ratio of 89.74％ in this study.Kinetics model was built to predict the ignition delay time and simulate the combustion process.The results show that:with the increasing hydrogen blending ratio,there is only little change about the first stage ignition delay time of DME/H2/O2/N2 mixture,and the total ignition delay time extends;with the increasing equivalence ratio and compressed pressure,the first stage ignition delay time of the DME/H2/O2/N2mixture only has little change,and the total ignition delay time shortens.