کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4764349 1423551 2017 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Experimental study and analysis on the interaction between two slot-burner buoyant turbulent diffusion flames at various burner pitches
ترجمه فارسی عنوان
بررسی و تحلیلی تجربی بر روی تعامل بین شعله های نفوذ پریشانی شناور شونده ی شعله ی آتش در مناطق مختلف فایبر
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
چکیده انگلیسی
This paper investigated the interaction of two slot-burner buoyant turbulent diffusion flames at various burner pitches. Experiments were conducted by employing two identical slot burners (length: 142.5 mm; width: 2 mm) using propane as fuel at various fuel exit velocities. Results showed that with an increase in burner pitch, the interaction of the two flames made a transition from merging to non-merging, resulting in a complex non-monotonic evolution of flame height. An analytical model was developed to characterize the critical burner pitch for flame merging, which was found to be proportional to the free flame height, or have a 2/3 power law dependence on the fuel exit velocity. As a result of their interaction, the flame merging point height increased till the two flames separated with the increase in burner pitch. Meanwhile, the flame height was shown to first decrease, then increase and finally approach the free flame height with the increase in burner pitch. A scaling non-dimensional formula was finally proposed, based on the analysis of the change in air entrainment into the flame from the space between the two burners with burner pitch variation. This proposed formula was shown to well correlate the above transitions based on a newly defined non-dimensional heat release rate using an “effective” entrainment perimeter as a characteristic length, which includes the burner width and length as well as the additional flame base “extension” due to the change in burner pitch.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Combustion and Flame - Volume 186, December 2017, Pages 105-113
نویسندگان
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