کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4768603 | 1424958 | 2017 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effects of injection pressure on ignition and combustion characteristics of diesel in a premixed methanol/air mixture atmosphere in a constant volume combustion chamber
ترجمه فارسی عنوان
تأثیر فشار تزریق بر ویژگی های احتراق و احتراق دیزل در فاز مخلوط متانول / هوا مخلوط در محفظه احتراق حجم ثابت
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کلمات کلیدی
CNGDAQSMDDMDFMAACVCCAHRRDMESauter mean diameter - Sauter متوسط قطرData acquisition - اکتساب داده هاparticulate number - تعداد ذراتAir atmosphere - جو هواDiesel - دیزلDimethyl ether - دیمتیل اترparticulate matter - ذرات معلقapparent heat release rate - سرعت آزاد شدن حرارت ظاهریdiesel/methanol dual fuel - سوخت دیزل / متانول دوگانهSOC - سیستم روی یک تراشهStart of combustion - شروع احتراقFlame lift-off length - طول بلند شدن شعلهInjection pressure - فشار تزریقMethanol - متانولconstant volume combustion chamber - محفظه احتراق حجم ثابتIgnition characteristics - مشخصات جرقه زنیcompressed natural gas - گاز طبیعی فشرده
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
چکیده انگلیسی
The experiments on the ignition and combustion characteristics of diesel in air atmosphere (AA) and premixed methanol/air mixture atmosphere (MAA) were conducted in a constant volume combustion chamber (CVCC) equipped with a high pressure common-rail injection system. The ignition and combustion processes were recorded by a high-speed camera and a combustion pressure acquisition system. Results show that with the increase of injection pressure from 40 to 160Â MPa, the flame lift-off length (FLoL) becomes longer; and the ignition delay is shortened from 2.80Â ms to 2.03Â ms (AA) and 2.90Â ms to 2.27Â ms (MAA) respectively; and correspondingly the combustion duration is shortened from 5.17Â ms to 2.47Â ms (AA) and 4.83Â ms to 2.13Â ms (MAA). Compared those in AA, the ignition delay is prolonged by 0.14Â ms on average, while the combustion duration is shortened by 0.27Â ms in MAA. At high injection pressure, the moments that the maximum combustion pressure occurs and the apparent heat release rates (AHRR) starts to rise are advanced; while in MAA both of them are delayed; and the peak value of AHRR increases. With the increase of injection pressure, both spatially integrated natural luminosity (SINL) and time integrated natural luminosity (TINL) reduce significantly, but the reduction trends of TINL weaken. Due to the addition of methanol, the FLoL of diesel becomes longer, and the SINL and TINL in MAA are both lower than those in AA.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Fuel - Volume 206, 15 October 2017, Pages 593-602
Journal: Fuel - Volume 206, 15 October 2017, Pages 593-602
نویسندگان
Chunde Yao, Jiangtao Hu, Peilin Geng, Junjie Shi, Defu Zhang, Yusheng Ju,