CAJ | 학술논문

在满足国Ⅳ排放法规的车用柴油机上研究了燃用不同掺混体积比例的棕榈油生物柴油的颗粒物排放特性。试验中棕榈油生物柴油的掺混比例分别为0%、10%、20%、50%和100%，采用DMS500型快速颗粒光谱仪测试分析了发动机在外特性和负荷特性时的颗粒物数量浓度、质量浓度及粒径分布。研究结果表明：随生物柴油掺混比例的增加，颗粒物质量浓度降低。燃用生物柴油后颗粒物的数量浓度在大负荷明显降低，中小负荷呈升高趋势。生物柴油的排气颗粒物呈核态和凝聚态的双峰分布特征，核态数量浓度所占比例高于柴油，凝聚态的质量浓度所占比例略低于柴油。生物柴油颗粒物的几何平均直径小于柴油。
재만족국Ⅳ배방법규적차용시유궤상연구료연용불동참혼체적비례적종려유생물시유적과립물배방특성。시험중종려유생물시유적참혼비례분별위0%、10%、20%、50%화100%，채용DMS500형쾌속과립광보의측시분석료발동궤재외특성화부하특성시적과립물수량농도、질량농도급립경분포。연구결과표명：수생물시유참혼비례적증가，과립물질량농도강저。연용생물시유후과립물적수량농도재대부하명현강저，중소부하정승고추세。생물시유적배기과립물정핵태화응취태적쌍봉분포특정，핵태수량농도소점비례고우시유，응취태적질량농도소점비례략저우시유。생물시유과립물적궤하평균직경소우시유。
Characteristics of particulate emission of engines fuelled with different blend ratios of palm oil derived biodiesel and Ultra Low Sulfur Diesel (ULSD) were studied using a China-IV diesel engine. Five biodiesel-ULSD blends of 0%、10%、20%、50%and 100%were tested. The particle mass (PM) concentration, particle number (PN) density, and particle size distribution were measured by DMS500 particulate spectrometer. The results showed PM concentration decreased with the increase of biodiesel blend ratios. The total PN density decreased significantly at high load,while increased at low and medium loads. Bimodal PN size distribution was observed corresponding to nucleation mode and accumulation mode particles. Comparing with ULSD, biodiesel exhibited higher percentage of nucleation mode PN emissions and lower percentage of accumulation mode PM emission. Also, biodiesel exhibited smaller particulatd mean diameter than that of ULSD.