CAJ | 학술논문

在模拟高原条件下 ,针对3种不同品质的柴油(十六烷值和馏分)对某增压柴油机的燃烧特性的影响规律进行了研究分析 ,并据此简要分析在高原运行时出现活塞烧蚀故障与所用油品的关系.结果显示 :目前在用柴油由于其十六烷值低 ,柴油不易被压燃着火 ,滞燃期长 ,且初馏温度低 ,柴油容易蒸发 ,预混合燃烧期内积累的热量多 ,造成缸内压力的升高速率增大 ,燃烧过程粗暴 ;海拔升高 ,空气密度下降 ,柴油的着火时间延长 ,燃烧速度加快 ,最大压力升高率增大 ,由此产生强烈的热负荷和机械负荷冲击 ,容易造成活塞烧蚀.
재모의고원조건하 ,침대3충불동품질적시유(십륙완치화류분)대모증압시유궤적연소특성적영향규률진행료연구분석 ,병거차간요분석재고원운행시출현활새소식고장여소용유품적관계.결과현시 :목전재용시유유우기십륙완치저 ,시유불역피압연착화 ,체연기장 ,차초류온도저 ,시유용역증발 ,예혼합연소기내적루적열량다 ,조성항내압력적승고속솔증대 ,연소과정조폭 ;해발승고 ,공기밀도하강 ,시유적착화시간연장 ,연소속도가쾌 ,최대압력승고솔증대 ,유차산생강렬적열부하화궤계부하충격 ,용역조성활새소식.
The combustion characteristics of turbocharged diesel engine fueled with three types of diesel fuel with different cetane number and distillation were researched at plateau environment and the relationship between piston ablation and fuel property was briefly analyzed . The results show that the fuel with low cetane number and low dropping point leads to difficult compression ignition ,long ignition delay ,ac-cumulative heat in premixing period ,in-cylinder pressure fast increase and even abrupt combustion process .With the increase of altitude ,the atmospheric density decreases ,the ignition period of diesel fuel prolongs ,the combustion accelerates ,and the maximum pressure rise rate in-creases .The intensive thermal load and mechanical load due to the previous factors tend to cause piston ablation .