کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8076782 | 1521471 | 2014 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Numerical simulation on effects of spray angle in a swirl chamber combustion system of DI (direct injection) diesel engines
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی انرژی
انرژی (عمومی)
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Numerical simulation on effects of spray angle in a swirl chamber combustion system of DI (direct injection) diesel engines Numerical simulation on effects of spray angle in a swirl chamber combustion system of DI (direct injection) diesel engines](/preview/png/8076782.png)
چکیده انگلیسی
In order to make better air utilization in combustion chamber to improve the mixture quality, enhance combustion efficiency and reduce emissions, a new swirl chamber combustion system of DI (direct injection) diesel engines is proposed. The in-cylinder spray, mixture formation and combustion progresses are simulated and investigated at different nozzle angles with AVL-FIRE code. Results show that in the current combustion system, spray angle of 146° is the best on the aspect of mixture homogeneity among all the cases. NO mass fraction is the lowest at spray angle of 154°, while Soot mass fraction is the lowest at spray angle of 146°. At the initial stage of spray, the fuel/air equivalence ratio distribution was primarily controlled by the squish and swirl, while after ignition in expansion stroke, the combustion swirl and reverse squish had great impact on the in-cylinder temperature distribution. To sum up, the spray angle and air motion matching with the combustion chamber is a key factor on combustion process and emissions performance. Considering the emission performance, spray angle of 150° is a relatively better compromise in the new combustion system.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Energy - Volume 75, 1 October 2014, Pages 289-294
Journal: Energy - Volume 75, 1 October 2014, Pages 289-294
نویسندگان
Shengli Wei, Kunpeng Ji, Xianyin Leng, Feihu Wang, Xin Liu,