CAJ | 학술논문

分析了生物柴油的燃料特性及脂肪酸组成结构,结合发动机燃烧生物柴油的试验,分析了燃料的十六烷值、密度、运动黏度、氧化安定性、不饱和双键的数量和位置等因素对NO_x排放的影响;运用FIRE软件分别模拟了生物柴油与柴油燃烧时的温度场、氧浓度场、黏度场以及十六烷值对滞燃期的影响规律.结果表明:生物燃料较低的十六烷值、较大的密度和运动黏度、较差的氧化安定性、存在双键且双键位置偏向脂肪链中间等,均会导致生物柴油NO_x排放升高.提出了降低NO_x排放的方法.
분석료생물시유적연료특성급지방산조성결구,결합발동궤연소생물시유적시험,분석료연료적십륙완치、밀도、운동점도、양화안정성、불포화쌍건적수량화위치등인소대NO_x배방적영향;운용FIRE연건분별모의료생물시유여시유연소시적온도장、양농도장、점도장이급십륙완치대체연기적영향규률.결과표명:생물연료교저적십륙완치、교대적밀도화운동점도、교차적양화안정성、존재쌍건차쌍건위치편향지방련중간등,균회도치생물시유NO_x배방승고.제출료강저NO_x배방적방법.
Based on analysis of the biodiesel properties and its fatty acid composition, the influences of fuel properties such as cetane number, density, kinematic viscosity, oxidation stability and number and position of unsaturated double bonds on NO_x emission were investigated by engine test. The effects of temperature field, oxygen concentration field, viscosity field and cetane number on ignition delay period were simulated by using Fire software when fuelled with diesel and biodiesel respectively. The results show that low cetane number, high density and kinematic viscosity, poor oxidation stability, double bond and its position of the biodiesel fuel can lead to high NO_x emission. Some measures to reduce NO_x emission were also proposed.