添加乙醚对柴油-生物柴油混合燃料性能影响的研究  

On the Performance Influence of the Ether Additive in Diesel- biodiesel Blend Fuel

作　　者：陈昊[1] 王琪[1] 王娇[1] 李佳[1] 

机构地区：[1]长安大学交通新能源开发应用陕西省重点实验室,陕西西安710064

出　　处：《陕西交通职业技术学院学报》2010年第1期23-27,共5页Journal of Shaanxi College of Communication Technology

摘　　要：在一台小型直喷式柴油机上进行柴油-生物柴油（柴油70％，生物柴油30％）与柴油-生物柴油-乙醚（柴油70％，生物柴油25％，乙醚5％）两种混合燃料的燃烧、油耗和排放性能对比试验。分析了乙醚的加入对柴油-生物柴油混合燃料的发动机燃烧压力、放热律、滞燃期、比油耗和排放等的影响。研究结果表明：随着乙醚的加入，混合燃料滞燃期延长1°CA，转速为1500r／min、平均有效压力0．531MPa时最大燃烧压力降低0．3％，最大压力升高率和最大燃烧放热率分别增加9．0％和6．3％；转速为1500r／min时在7个负荷点比油耗平均降低了5．2％，比能耗降低了5．4％；在排放特性上，随着乙醚的加入混合燃料的CO、HC和烟度排放在7个负荷点分别降低了39．7％、12．8％和50．6％，NOx平均增加了11．6％Combustion, fuel consumption and emission performance comparative experiments between the diesel-biodiesel blend fuel （diesel 70%, biodiesel 30% ） and diesel-biodiesel-ether blend fuel （diesel 70%, biodiesel 25% , aether 5% ） are done on a single cylinder diesel engine. Combustion pressure, heat release, igni- tion delay period and specific fuel consumption are analyzed after adding ether. Results indicates as mixing ether, ignition delay period of the blend fuel increases 1°CA at rotate speed of 1500 r/min, at the average effective pres- sure MPa, maximal combustion pressure decreases 0.3 %, maximal pressure increasement ratio and heat release ratio increases 9.0% and 6.3% while at rotate speed of 1500 r/min, the specific fuel consumption and specific energy consumption decreases 5.2% and 5.4%. As adding ether, CO, HC and smoke emission decrease 39.7% ,12. 8% and 50.6%, and yet OX emission increases 11.6%.

关 键 词：直喷式柴油机 生物柴油 乙醚 滞燃期 燃烧压力 压力升高率 燃烧放热率 排放 

分 类 号：U473.19[机械工程—车辆工程]