کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
655752 1457656 2010 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Analysis of cyclic variations of liquid fuel–air mixing processes in a realistic DISI IC-engine using Large Eddy Simulation
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
پیش نمایش صفحه اول مقاله
Analysis of cyclic variations of liquid fuel–air mixing processes in a realistic DISI IC-engine using Large Eddy Simulation
چکیده انگلیسی

Direct injection spark ignition (DISI) engines have a large potential to reduce emissions and specific fuel consumption. One of the most important problem in the design of DISI engines is the cycle-to-cycle variations of the flow, mixing and combustion processes. The Large Eddy Simulation (LES) based analysis is used to characterize the cycle-to-cycle fluctuations of the flow field as well as the mixture preparation in a realistic four-stroke internal combustion engine with variable charge motion system. Based on the analysis of cycle-to-cycle velocity fluctuations of in-cylinder flow, the impact of various fuel spray boundary conditions on injection processes and mixture preparation is pointed out. The joint effect of both cycle-to-cycle velocity fluctuations and variable spray boundary conditions is discussed in terms of mean and standard deviation of relative air–fuel ratio, velocity and mass fraction. Finally a qualitative analysis of the intensity of cyclic fluctuations below the spark plug is provided.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Heat and Fluid Flow - Volume 31, Issue 5, October 2010, Pages 845–849
نویسندگان
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