کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6637025 | 461139 | 2014 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effect of injection timing on particle size distribution from a diesel engine
ترجمه فارسی عنوان
تأثیر زمان تزریق بر توزیع اندازه ذرات از یک موتور دیزل
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کلمات کلیدی
موتور دیزل، زمان تزریق، توزیع اندازه ذرات، احتراق دما پایین،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
چکیده انگلیسی
The present work focused on the effect of injection timing, which changed from 23° CA before top dead center (â23° CA ATDC) to 8° CA after top dead center (8° CA ATDC), on particle size distribution (PSD) from a diesel engine operated under 0% and 40% EGR rates. The results show that PSDs under 0% EGR is dominated by the nucleation mode (NM), and injection timing shows no significant effect on NM on a log plot, while the early and late injections produce the low AM. Under 40% EGR, PSD is dominated by NM with very early and late injections, while it is dominated by the accumulation mode (AM) for â20 to â5° CA ATDC, and an apparent “AM bump” occurs at round â10° CA ATDC. The phenomenon of “AM bump” indicates that the coupling early or late injection and EGR favors low temperature combustion (LTC), and which results in a simultaneous reduction in soot (AM) and NOx emissions. A negative relationship between Nnuc and Nacc with the change in injection timing suggests that LTC potentially promotes the formation of NM. A more evident trade-off relationship between Ntot and Mtot is presented under 40% EGR than that under 0% EGR, which indicates that in-cylinder PM formation and oxidation is more dependent on injection timing under 40% EGR.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Fuel - Volume 134, 15 October 2014, Pages 189-195
Journal: Fuel - Volume 134, 15 October 2014, Pages 189-195
نویسندگان
Xinling Li, Zhen Xu, Chun Guan, Zhen Huang,