CAJ | 학술논문

针对车辆燃油机燃用含氧燃料的燃烧、排放以及发动机适应性的问题，基于 CFD 软件建立了柴油机燃用柴油和 B20D10（70％柴油＋20％生物柴油＋10％DMC）含氧燃料的数值仿真模型，计算了柴油机喷油提前角和最大供油量对含氧燃料动力性以及排放特性的影响，结果表明：柴油机燃用含氧混合燃料时，其缸内燃烧温度低，NO x的生成时刻晚，碳烟排放明显降低；增加柴油机喷油提前角，柴油机的动力性提高，碳烟排放减少，但是柴油机的机械负荷以及 NO x 排放恶化；通过增加极限喷油量的方法可以解决含氧燃料功率下降的问题，极限供油量增大10％后，柴油机最大功率比原机燃用柴油提高了4％，同时能降低40％的碳烟排放量。
침대차량연유궤연용함양연료적연소、배방이급발동궤괄응성적문제，기우 CFD 연건건립료시유궤연용시유화 B20D10（70％시유＋20％생물시유＋10％DMC）함양연료적수치방진모형，계산료시유궤분유제전각화최대공유량대함양연료동력성이급배방특성적영향，결과표명：시유궤연용함양혼합연료시，기항내연소온도저，NO x적생성시각만，탄연배방명현강저；증가시유궤분유제전각，시유궤적동력성제고，탄연배방감소，단시시유궤적궤계부하이급 NO x 배방악화；통과증가겁한분유량적방법가이해결함양연료공솔하강적문제，겁한공유량증대10％후，시유궤최대공솔비원궤연용시유제고료4％，동시능강저40％적탄연배방량。
In view of the problem of energy shortage,a CFD model is established to simulate numerically the mixture gas formation,combustion and emissions of diesel and B20D10 oxygenated fuel.The impact of fuel supply advance angle and maximum fuel supply amount on oxygenated fuel dynamic performance and emission feature are calculated as well.Result shows that compared with diesel oil,the application of B20D10 oxygenated mixed fuel leads to a lower temperature in the engine cylinder,the NO x generation timing is later and soot emissions is significantly reduced.Power performance of the engine increases and soot emissions decrease as the fuel supply advance angle increases,yet mechanical loads and NO x emis-sions deteriorate.The oxygenated fuel power decline problem could be solved by increasing maximum fuel supply amount.As maximum fuel supply amount increases by 10%,the maximum power of diesel engine applied with oxygenated fuel increases by 4% compared to the engine applied with diesel,and the soot e-missions also decrease by 40%.