天然气制油/柴油混合燃料对小型柴油机燃烧特性的影响  

Effects of GTL/diesel blended fuel on combustion from small diesel engine

作　　者：孙万臣[1] 李国良[1] 马一功[1] 解方喜[1] 孟德军[1] 刘忠长[1] 

机构地区：[1]吉林大学汽车动态模拟国家重点实验室,长春130022

出　　处：《吉林大学学报（工学版）》2010年第6期1507-1512,共6页Journal of Jilin University:Engineering and Technology Edition

基　　金：国家自然科学基金项目(50876039);'973'国家重点基础研究发展计划项目(2007CB210003);吉林省科技发展计划项目(20090542)

摘　　要：应用自行开发的柴油机瞬态工况测控系统,研究了GTL(Gas to liquid)添加比例对小型直喷式柴油机稳态及恒转速增转矩瞬态工况下燃烧特性的影响规律。结果表明:在稳态和恒转速增转矩瞬态工况下,GTL添加比例对燃烧参数的影响具有基本相同的规律,随着GTL燃料添加比例的增加,着火始点提前,滞燃期缩短,预混合燃烧期和预混合燃烧量减小,缸内压力峰值、放热率峰值、燃烧温度有所降低,有利于降低NOx的排放量和燃烧噪声。当添加少量GTL燃料时,燃烧持续期延长,随着GTL添加比例的增加,燃烧持续期有所缩短。100%GTL燃料的燃烧持续期与柴油相当。The effects of the blending fraction of gas-to-liquid（GTL） fuel in the GTL/diesel blended fuel on the combustion characteristic of a small diesel engine under steady operating conditions and transient conditions of fixed speed and increasing torque were studied experimentally using a home-made transient operation control and measure system for diesel engine.The results showed that the effects of the GTL fraction in the blended fuel on the combustion parameters demonstrate a similar tendency under steady and fixed speed and increasing torque operating conditions.Increase of GTL fraction leads to advanced ignition start,shorter ignition delay period,shorter pre-mixed combustion period,reduced in-cylinder peak combustion pressure and reduced heat release rate.All these changes are good for the reduction of NOx emissions and combustion noise.Adding a little of GTL fuel into diesel fuel increases the combustion duration of the diesel engine,but the duration decreases with the increase of the GTL fraction.The combustion duration of the engine using pure TGL fuel is equivalent to that using pure diesel fuel.

关 键 词：动力机械工程 柴油机 瞬态工况 天然气制油/柴油混合燃料 燃烧 排放 

分 类 号：TK421.5[动力工程及工程热物理—动力机械及工程]