کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4915542 1427919 2015 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Combined effects of flow/spray interactions and EGR on combustion variability for a stratified DISI engine
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Combined effects of flow/spray interactions and EGR on combustion variability for a stratified DISI engine
چکیده انگلیسی
Results reveal two types of flow/spray-interactions that predict the likelihood of a partial burn. (1) Proper flow direction before injection with a more collapsed spray leads to high kinetic energy of the flow during injection, thus generating a rapid early burn, which ensures complete combustion, regardless of the EGR level. (2) Improper flow direction and less collapsed spray generate low flow energy during the early phase of combustion. For this second type of flow/spray-interaction, application of EGR results in a partial-burn frequency of 30%, whereas without EGR, early combustion is shown to be insensitive to flow variations. Flame-probability maps illustrate that the partial-burn cycles for operation with EGR have a weak flame development in that the flame does not develop uniformly and reliably from the spark plug. Without EGR, the flame development is more repeatable regardless of the type of flow/spray-interaction, at the expense of higher NOx emissions.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Proceedings of the Combustion Institute - Volume 35, Issue 3, 2015, Pages 2907-2914
نویسندگان
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