摘要
针对不同醇类组分对柴油机的实用性影响进行研究。在单缸柴油机上分别燃用纯柴油、乙醇柴油和正丁醇柴油三种燃料，并进行负荷特性的燃烧排放对比试验。结果表明，与纯柴油相比，正丁醇柴油和乙醇柴油的滞燃期延长0.1°～2°曲轴转角，最大放热率峰值升高最大可达36％，最大爆发压力推迟约0.4°～4°曲轴转角；中等转速1500 r/min时，正丁醇柴油和乙醇柴油的动力性优于纯柴油；高转速2000 r/min时，正丁醇柴油、乙醇柴油与纯柴油动力相当，正丁醇柴油的当量燃油消耗率与乙醇柴油、纯柴油相比分别减少约2.5％和4％。正丁醇柴油的NOx排放大多数工况下低于纯柴油约17％～39％，且降低效果较乙醇柴油更为明显，而乙醇柴油在标定转速中高负荷工况时NOx排放高于纯柴油；醇类柴油的碳烟排放比纯柴油降低，正丁醇柴油相对于乙醇柴油抑制碳烟生成的工况点更多，在标定点工况下正丁醇柴油比纯柴油的碳烟可降低62％。可见作为柴油机的替代燃料，在大多数工况下正丁醇柴油燃烧排放性能优于乙醇柴油。该研究为柴油机燃用正丁醇的推广提供了试验依据。
This study investigates the utility of different alcohol species on diesel engine.Load ex-periments were carried out on a small direct injection diesel engine fueled with pure diesel , ethanol/diesel blends and n-butanol/diesel blends.The results show that the ignition delay period of alco-hol/diesel blends is longer than pure diesel about 0.1°~2°crank angle, the maximum peak heat release rate increases by up to 36%and maximum explosion pressure delays about 0.4°~4°crank angle.The power performance of diesel/alcohol blends is superior to pure diesel at 1 500 r/min,but is equivalent at 2 000 r/min.Compared with that of ethanol/diesel blends and pure diesel, the e-quivalent specific energy consumption rate of n-butanol/diesel blends is declined by 2.5%and 4%respectively.NOx emission of n-butanol/diesel blends is lower than pure diesel about 17%~39%at most engine operation conditions and fall more obviously than ethanol/diesel blends.NOx emis-sion of ethanol/diesel blends is higher than pure diesel at 2 000 r/min and higher load conditions. Compared with pure diesel, the smoke emissions are reduced for alcohol/diesel blends.The soot e-missions are lower for n-butanol/diesel blends than ethanol/diesel blends.Compared to that of pure diesel, soot emissions of n-butanol/diesel blends can be reduced 62% under rated power condi-tions.Therefore, it can be seen, comparing with ethanol/diesel blends, n-butanol/diesel blends are more suitable for diesel engine at most operating conditions.The study provides an experimental ba-sis for the promotion of the engine fueled with n-butanol.
出处
《广西大学学报（自然科学版）》
CAS
北大核心
2014年第5期1000-1006,共7页
Journal of Guangxi University（Natural Science Edition）
基金
广西自然科学基金面上项目(2012GXNSFAA053201)
2012年广西高等学校立项科研项目(201204LX010)
广西制造系统与先进制造技术重点实验室项目(13-051-09S06)
关键词
柴油
正丁醇柴油
乙醇柴油
燃烧
排放
diesel
n-butanol/diesel blends
ethanol/diesel blends
combustion
experiment
