CAJ | 학술논문

建立了柴油机微粒捕集器（DPF）的三维仿真模型，并验证了模型的准确性。模拟计算了DPF连续被动再生过程中 m （NO2）/m （Soot ）比例、排气温度及450℃时 O2浓度对再生平衡的影响。结果表明：排气中m（NO2）/m（Soot）比例为5时再生达到平衡，比例越高越有利于去除微粒物；排气温度越高参与再生反应的O2越多，越有利于DPF再生达到平衡；排气温度为450℃及O2浓度为5％时达到平衡，其浓度越高则再生速率越高。
건립료시유궤미립포집기（DPF）적삼유방진모형，병험증료모형적준학성。모의계산료DPF련속피동재생과정중 m （NO2）/m （Soot ）비례、배기온도급450℃시 O2농도대재생평형적영향。결과표명：배기중m（NO2）/m（Soot）비례위5시재생체도평형，비례월고월유리우거제미립물；배기온도월고삼여재생반응적O2월다，월유리우DPF재생체도평형；배기온도위450℃급O2농도위5％시체도평형，기농도월고칙재생속솔월고。
A three-dimensional simulation model of diesel particulate filter (DPF) was established and its accuracy was veri-fied .During the DPF passive regeneration process ,the influences of m (NO2 )/m (Soot) ratio ,exhaust temperature and oxygen concentration at 450 ℃ on regeneration balance were simulated and calculated .The results show that the m (NO2 )/m (Soot) ratio for regeneration balance is 5 and its higher value is beneficial to restrain the particulate .The higher exhaust temperature leads to more reacted oxygen ,which is helpful to regeneration balance .When the exhaust temperature is 450 ℃ and the oxygen concentration is 5% ,the DPF regeneration reaches balance .It is found that the higher oxygen concentration can accelerate the regeneration .