کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6634791 | 461116 | 2015 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effect of intake pre-heating and injection timing on combustion and emission characteristics of a methanol fumigated diesel engine at part load
ترجمه فارسی عنوان
تاثیر پیش گرم کردن مصرف و زمان تزریق بر احتراق و ویژگی های انتشار یک موتور دیزل مجهز به متانول در بار بخشی
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کلمات کلیدی
DMDFMSPFSNECUAHRRCompression-ignitionDMCCaTDCEGRLPGCNGdiesel methanol compound combustionmethanol substitution percentbTDC - BTDCNOx - NOXEmissions - انتشاراتNitrogen oxides - اکسید نیتروژنafter top dead center - بعد از مرده مردهDual fuel - دوگانهسوزdiesel methanol dual fuel - دیزل متانول سوخت دوگانهparticulate matter - ذرات معلقBrake thermal efficiency - راندمان حرارتی ترمزCrank Angle - زاویه میل لنگapparent heat release rate - سرعت آزاد شدن حرارت ظاهریSOC - سیستم روی یک تراشهStart of combustion - شروع احتراقFilter Smoke Number - شماره دود فیلترbefore top dead center - قبل از مرده مردهelectronic control unit - واحد کنترل الکترونیکیBTE - وسایل کمکCombustion characteristics - ویژگی های احتراقcompressed natural gas - گاز طبیعی فشردهliquefied petroleum gas - گاز مایع شدهexhaust gas recirculation - گردش بازگشتی گاز اگزوز
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
چکیده انگلیسی
Diesel-methanol dual fuel (DMDF) engines at light loads suffer from low thermal efficiency and high unburned percentages of fuel. Pilot fuel injection timing and intake temperature are two important parameters which affect the combustion process in DMDF engines. In present experimental work, the combined effects of intake temperature and injection timing on the performance of a DMDF engine have been studied. The experiments were conducted on a methanol-fumigated diesel engine at 25% of full load and the results concerning performance, combustion characteristics and emissions were analyzed. Results show that the low efficiency at light loads can be improved significantly by raising the intake temperature and advancing the injection timing of direct-injected diesel. Increasing the intake temperature also significantly decreases the heat release rate of premixed combustion and increases the combustion rate of methanol burned by flame propagation. Flame propagation of the methanol-air mixture disappears gradually and DMDF combustion transforms into single stage combustion as the injection timing is retarded. When injection timing is retarded after 4.6° crank angle, misfire occurs at higher methanol substitute percent (MSP) and lower intake temperature, while the auto-ignition of methanol occurs at lower MSP and higher intake temperature. Under DMDF operation, soot and nitrogen oxides trade-off dilemma is completely broken at lower intake temperature and higher MSP.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Fuel - Volume 159, 1 November 2015, Pages 796-802
Journal: Fuel - Volume 159, 1 November 2015, Pages 796-802
نویسندگان
Quangang Wang, Chunde Yao, Zhancheng Dou, Bin Wang, Taoyang Wu,