کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
11016611 | 1774336 | 2019 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Experimental investigation on methanol auto-ignition in a compression ignition engine under DMDF mode
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کلمات کلیدی
MPRRdiesel methanol compound combustionmethanol substitution percentMSPPRRIMEPHRRECUPCCICLDLTCDMCCTHCDMDFHCCITDCaTDCEGRbTDC - BTDCNOx - NOXChemiluminescence detector - آشکارساز شیمیاییLow temperature combustion - احتراق دما پایینAuto-ignition - اشتعال خودکارnitrogen oxide - اکسید نیتروژنNitrogen oxides - اکسید نیتروژنafter top dead center - بعد از مرده مردهSpark-ignition - جرقه جرقهpremixed charge compression ignition - جرقه فشرده سازی شارژ پیش مخلوطFID - درdiesel methanol dual fuel - دیزل متانول سوخت دوگانهparticulate matter - ذرات معلقBrake thermal efficiency - راندمان حرارتی ترمزCrank Angle - زاویه میل لنگHomogeneous Charge Compression Ignition - سوپاپ فشرده سازی همگنbefore top dead center - قبل از مرده مردهMethanol - متانولtop dead center - مرکز مرده بالاcarbon monoxide - منوکسیدکربنDiesel engine - موتور دیزلHeat release rate - نرخ انتقال حرارتIndicated mean effective pressure - نشان دهنده فشار متوسط موثر استelectronic control unit - واحد کنترل الکترونیکیBTE - وسایل کمکCombustion characteristics - ویژگی های احتراقTotal hydrocarbons - کل هیدروکربن هاexhaust gas recirculation - گردش بازگشتی گاز اگزوز
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله

چکیده انگلیسی
At high loads, Diesel-Methanol Dual Fuel (DMDF) engines strongly rely on high methanol substitution for diesel proportion (MSP) to achieve high efficiency combustion and reduce nitrogen oxides (NOx) and soot emissions. However, high MSP is limited by the probability of methanol auto-ignition. The experimental study was conducted to investigate into the influence factors of methanol auto-ignition under diesel engine conditions at 50% of full load. Meanwhile the testing results concerning combustion characteristics and emissions have been analyzed. Experimental results showed that if there was apparent heat release before TDC, which was earlier than diesel fuel injection, it indicated that methanol auto-ignition occurred. In order to avoid methanol auto-ignition which is very easily to cause knock or rapid pressure rise, the in-cylinder mean temperature should be less than 990â¯K (at this case, the intake temperature was 338â¯K) before diesel injection timing. As intake temperature increased, methanol heat release timing was advanced and the heat release rate (HRR) was gradually accelerated. If the injection timing of diesel was later than that of methanol auto-ignition, almost all diesel fuel would be burned in the form of diffusion combustion in the methanol flame, leading to the increase of soot emissions. Methanol auto-ignition would be inhibited by EGR gas. The EGR and MSP had a great impact on both the ignition timing and the peak HRR of methanol auto-ignition. As EGR ratio increased, so did the incomplete combustion loss of methanol. As long as methanol auto-ignition occurred, the increase of MSP would result in a decrease in NOx emissions, but soot emissions were increased instead.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Fuel - Volume 237, 1 February 2019, Pages 133-141
Journal: Fuel - Volume 237, 1 February 2019, Pages 133-141
نویسندگان
Bin Wang, Anren Yao, Chunde Yao, Chao Chen, Han Lu, Jun Feng,