کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
765104 1462841 2016 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Experimental investigation of particle emissions under different EGR ratios on a diesel engine fueled by blends of diesel/gasoline/n-butanol
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی انرژی (عمومی)
پیش نمایش صفحه اول مقاله
Experimental investigation of particle emissions under different EGR ratios on a diesel engine fueled by blends of diesel/gasoline/n-butanol
چکیده انگلیسی


• The effects of EGR and blend fuels on particulate emission were studied in CI engine.
• EGR ⩽ 20%, gasoline or n-butanol increases total particulate number concentration.
• EGR ⩾ 30%, gasoline or n-butanol reduces total particulate number concentration.
• As EGR ratio increased, the particulate mass concentrations of four fuels increased.
• Gasoline or n-butanol increases the ratio of sub-25 nm particles number concentration.

The particle emission characteristics of a high-pressure common-rail engine under different EGR conditions were investigated, using pure diesel (D100), diesel/gasoline (with a volume ratio of 70:30, D70G30), diesel/n-butanol (with a volume ratio of 70:30, D70B30) and diesel/gasoline/n-butanol (with a volume ratio of 70:15:15, D70G15B15) for combustion. Our results show that, with increasing EGR ratios, the in-cylinder pressure peak decreases and the heat release is delayed for the combustion of each fuel. At an EGR ratio of 30%, the combustion pressure peaks of D70G30, D70B30, D70G15B15 and D100 have similar values; with an EGR ratio of 40%, the combustion pressure peaks and release rate peaks of D70G30 and D70G15B15 are both lower with respect to D100. For small and medium EGR ratios (⩽20%), after the addition of gasoline and/or n-butanol to the fuel, the total particle number concentration (TPNC) increases, while both the soot emissions and the average geometric size of particles decrease. At large EGR ratios (30% and 40%), the TPNC of D70B30, D70G15B15 and D70G20 compared to D100 are reduced by a maximum amount of 74.7%, 66.7% and 28.6%, respectively. As the EGR ratio increases, the total particle mass concentration increases gradually for all four fuels. Blending gasoline or/and n-butanol into diesel induces an increase in the number concentration of sub-25 nm particles (PN25) which may be harmful in terms of health. However, the PN25 decreases with increasing the EGR ratio for all the tested fuels. At a fixed EGR ratio, the PN25 of D100 is the smallest, followed by D70G30, D70G15B15, and D70B30. However, the ratios of the mass concentration of sub-25 nm particles to the total particle mass concentration are quite small, not exceeding 5%.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Energy Conversion and Management - Volume 121, 1 August 2016, Pages 212–223
نویسندگان
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