کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
657622 1458072 2014 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Experimental analysis of low air pressure influences on fire plumes
ترجمه فارسی عنوان
تجزیه و تحلیل تجربی فشار کم هوا بر روی آتش سوزی
کلمات کلیدی
فشار هوا کم، سرعت سوزاندن، آزمایش حرارتی بدون ابعاد، آتش سوزی،
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
چکیده انگلیسی
To examine the pressure effect on burning rate, flame height and axial temperature distribution of diffusion fires, experimental measurement and theoretical analysis on circular n-Heptane fires with serial sizes were conducted at two altitudes, i.e. 100.8 kPa (in a sea-level city Hefei) and 64.3 kPa (in a Tibetan city Lhasa). From the results, the mean burning rate at quasi-steady stage and boiling stage consistently implied that the exponent α (ṁ″∼DPα) varies for different heat transfer domination stages, i.e. α ⩽ 0 for conductive stage and α = 2/3 for convective stage. Analysis shows that the flame height, the axial flame and plume temperatures are all well correlated with the dimensionless heat release rate Q⁎∼Q/(PD5/2), with the correlation coefficients derived from the current low-pressure measurements. Analysis shows that the flame height and the plume temperature increase with the pressure rise as a power function of pressure for the same pool size.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Heat and Mass Transfer - Volume 70, March 2014, Pages 578-585
نویسندگان
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