摘要
为了研究己烯酸甲酯在均质压燃条件下的着火规律,通过一台快速压缩机开展了3-己烯酸甲酯(mhx3d)在上止点压力为1.1,1.5,2.0MPa,当量比为0.5,1.0,1.5条件下的着火试验.并将mhx3d着火延迟与己酸甲酯(mhx)在上止点压力为1.5,2.0MPa,当量比为1时的实验结果进行了对比.使用CHEMKIN-PRO软件对mhx3d和mhx在较宽的温度范围内的着火延迟进行模拟,并进行了反应物浓度分析、敏感性分析和反应路径分析,研究了影响着火的重要基元反应.此外,在mhx3d中加入正丁醇(比例20%,40%,60%)来研究正丁醇对mhx3d着火延迟的影响.结果表明:mhx3d的当量比减少会增大着火延迟,减小最大燃烧压力;mhx3d的着火延迟随着正丁醇含量的增加而增大;mhx3d的着火延迟会随上止点压力的增大而减少;与mhx相比,mhx3d不存在明显的负温度系数现象,这是因为mhx3d中含有碳碳双键.试验测量了mhx3d的着火延迟,揭示了双键结构对mhx3d着火的影响.
In order to investigate the ignition characteristic of methyl trans-3-hexenoate under homogeneous charge compression ignition conditions,autoignition experiments of methyl trans-3-hexenoate were carried out through a rapid compression machine at compressed pressures of 1.1,1.5 and 2.0 MPa with equivalence ratios of 0.5,1.0 and 1.5.The ignition delay of methyl trans-3-hexenoate was compared with that of methyl hexanoate at compressed pressures of 1.5 and 2.0 MPa with equivalence ratio of 1.0.Besides,simulations were performed with CHEMKIN-PRO software.Sensitivity analysis and reaction pathway analysis were conducted to find out the important elementary reactions that control ignition.The effect of n-butanol on ignition delay was studied by adding n-butanol in methyl trans-3-hexenoate.It was found that as the equivalence ratio decreased,the maximum combustion pressure reduced and the ignition delay of methyl trans-3-hexanoate increased.The addition of n-butanol increased the ignition delay,and larger ignition delay was measured with higher content of n-butanol.It was also found that the ignition delay of methyl trans-3-hexenoate decreased with the increase of the compressed pressure.Compared with methyl hexanoate,methyl trans-3-hexenoate features only one stage ignition and no obvious negative temperature coefficient phenomenon.This was due to the existence of carbon-carbon double bond structure in methyl trans-3-hexenoate.This study measured the ignition delay of methyl trans-3-hexenoate and revealed the effect of carbon-carbon double bond on the autoignition characteristic of methyl trans-3-hexenoate.
出处
《上海交通大学学报》
EI
CAS
CSCD
北大核心
2018年第4期437-446,共10页
Journal of Shanghai Jiaotong University
基金
上海市浦江人才计划(14PJD021)资助
关键词
快速压缩机
着火延迟
3-己烯酸甲酯
己酸甲酯
碳碳双键
正丁醇
rapid compression machine
ignition delay
methyl trans-3-hexenoate
methyl hexanoate
carbon-carbon double bond
n-butanol
