F-T/PODE掺混燃料对混合动力柴油机起动特性的影响  

Effect of F-T/PODE Blended Fuel on Starting Characteristics of Hybrid Diesel Engine

作　　者：陈东东 王铁 李国兴 乔天佑 侯振宁 Chen Dongdong;Wang Tie;Li Guoxing;Qiao Tianyou;Hou Zhenning(College of Mechanical and Vehicle Engineering,Taiyuan University of Technology,Taiyuan 030024,China)

机构地区：[1]太原理工大学机械与运载工程学院,山西太原030024

出　　处：《内燃机学报》2022年第3期233-239,共7页Transactions of Csice

基　　金：国家自然科学基金资助项目(51805353);山西重大专项资助项目(201811020006);山西省研究生创新资助项目(2021Y165).

摘　　要：基于单轴并联式混合动力试验平台,以0号柴油、煤基费托合成柴油(F-T柴油)和聚甲氧基二甲醚(PODE)为基础燃油,研究0号柴油、F-T柴油及F90P10(PODE体积分数为10%)和F80P20(PODE体积分数为20%)4种燃油在不同的起动瞬态变化条件下的燃烧和排放特性,分析F-T柴油/PODE掺混燃料对混合动力柴油机起动特性的影响.结果表明:与0号柴油相比,燃用F-T柴油时起动燃烧首循环的缸内压力、放热率和压力升高率峰值都有所降低,燃烧持续期增大;冷起动工况下,CO、NO_(x)排放峰值在24 V原机起动时分别降低42.3%和32.4%,800 r/min拖动起动时分别降低50.9%和55.0%,而碳烟峰值略有升高;热起动工况下,CO、NO_(x)和碳烟排放峰值在24 V原机起动时分别降低66.4%、64.5%和34.4%,800 r/min拖动起动时分别降低57.0%、48.6%和24.8%.与F-T柴油相比,随着PODE体积分数的增大,起动中CO和NO_(x)排放峰值略微增大,但碳烟排放大幅降低,弥补F-T柴油在冷起动时碳烟排放升高的不足.Based on a single-shaft parallel hybrid diesel engine test platform with 0^(#) diesel,coal-based Fischer-Tropsch(F-T diesel)and polymethoxymethylene dimethyl ethers(PODE)as the basic fuels,the combustion and emission characteristics of the engine fueled with 0#diesel,F-T diesel,F90P10(PODE volume fraction is 10%)and F80P20(PODE volume fraction is 20%)were experimentally studied under different starting transient con-ditions.The effect of F-T diesel/PODE blended fuel on starting performance of the hybrid-powered diesel engine was analyzed.The results show that when the F-T diesel is used,the peak values of in cylinder pressure,heat release rate and pressure rise rate in the first cycle of start-up are decreased,and the combustion duration is increased.Under the condition of cold start,the peak values of CO and NO_(x) are reduced by 42.3%and 32.4%respectively at original 24 V start condition,and 50.9%and 55.0%respectively at 800 r/min starting condition,while the soot peak slightly increases.Under hot start condition,the emission peaks of CO,NO_(x) and soot decrease by 66.4%,64.5%and 34.4%at original 24 V start condition,and 57.0%,48.6%and 24.8%at 800 r/min start condition,respectively.Compared with F-T diesel,with the increase of PODE ratio,the peak value of CO and NO_(x) emissions increases slightly during the start-up process,but the soot emission decreases significantly,which can make up for the deficiency of F-T diesel in the cold start.

关 键 词：混合动力柴油机 煤基费托合成柴油(F-T柴油) 聚甲氧基二甲醚 快速起动 燃烧 排放 

分 类 号：TK421.2[动力工程及工程热物理—动力机械及工程]