基于快速压缩机的二甲醚掺氢着火延迟特性研究  

Study on Combustion Characteristics of Dimethyl Ether and Hydrogen Blends Based on a Rapid Compression Machine

作　　者：石智成 卢海涛[1,2] 刘昊[1,2] 张红光[1,2] 

机构地区：[1]北京工业大学环境与能源工程学院,北京100124 [2]北京电动车辆协同创新中心,北京100124

出　　处：《工程热物理学报》2016年第6期1345-1353,共9页Journal of Engineering Thermophysics

基　　金：北京市自然科学基金资助项目(No.3152005);国家自然科学基金资助项目(No.51376011);北京市教育委员会科技计划重点项目(No.KZ201410005003)

摘　　要：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/N2 mixture only has little change,and the total ignition delay time shortens.

关 键 词：快速压缩机 二甲醚 氢气 着火延迟期 

分 类 号：TK401[动力工程及工程热物理—动力机械及工程]