کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7058327 1458076 2013 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Experimental and numerical study of premixed flame propagation in a closed duct with a 90° curved section
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
پیش نمایش صفحه اول مقاله
Experimental and numerical study of premixed flame propagation in a closed duct with a 90° curved section
چکیده انگلیسی
The premixed flame propagation in a closed duct with a 90° bend is studied using high-speed schlieren photography and numerical simulation. The investigation provides basic understanding of the influence of the bend on the premixed flame propagation. The flame undergoes four stages in the propagation. The outer flame skirt influences significantly the flame dynamics. The flame surface area reaches its minimum value after the full formation of tulip flame. The flame dynamics observed in the experiment is well reproduced by the numerical simulation. The flame behavior at the later stage is in close connection with the hydrodynamics of the combustion-generated flow. The numerical simulation indicates that a single vortex is generated near the flame tip in the burnt gas just before the formation of flame indentation. The vortex remains in the vicinity of the flame tip and changes the flow field around the flame front. As a consequence, the effects of the circulating flow create the conditions required for the formation of a tulip flame.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Heat and Mass Transfer - Volume 66, November 2013, Pages 818-822
نویسندگان
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