کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6639965 | 461153 | 2013 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Numerical study on spray and combustion characteristics of diesel and soy-based biodiesel in a CI engine
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Numerical study on spray and combustion characteristics of diesel and soy-based biodiesel in a CI engine Numerical study on spray and combustion characteristics of diesel and soy-based biodiesel in a CI engine](/preview/png/6639965.png)
چکیده انگلیسی
This study is to investigate spray, combustion and emission characteristics of mixtures of diesel and soy-based biodiesel in a CI engine. A surrogate mechanism is developed by combining the skeletal mechanisms of methyl butanoate and n-heptane. Thermophysical properties are validated against measured tip penetrations and Sauter mean diameters (SMDs) of nonreacting sprays. Biodiesel shows spray characteristics of larger SMD's, lower volatility and slower mixing with ambient air due to larger viscosity and surface tension. Engine simulation is performed by the CMC-ISR model to resolve coupling between chemistry and turbulence. There is no noticeable difference in ignition delays of diesel and biodiesel, while flame propagates slower with slower evaporation and mixing for biodiesel. Results are in good agreement for pressure traces, NOx and trends of variation of CO and PM in a range of operating conditions. NOx decreased for BDÂ <Â 60% and increased for BDÂ >Â 60% with increasing biodiesel fraction, while PM and CO decreased due to the oxygen content in biodiesel in the test engine.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Fuel - Volume 113, November 2013, Pages 537-545
Journal: Fuel - Volume 113, November 2013, Pages 537-545
نویسندگان
Youngjae Lee, Kang Y. Huh,