کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
657671 1458064 2014 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Experimental investigation on window ejected facade flame heights with different constraint side wall lengths and global correlation
ترجمه فارسی عنوان
تحقیقات تجربی بر روی پنجره ها از شعاع فانوس خارج شده با طول های مختلف دیوار جانبی محدود و همبستگی جهانی
کلمات کلیدی
آتش خاموش، طول دیوار جانبی، نما ارتفاع شعله، پنجره پارامتر جهانی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
چکیده انگلیسی

This paper presents an experimental investigation on the effect of side wall length (normal to the facade direction) on the ejected facade flame height from a window of an under-ventilated compartment fire. The ejected facade flames are recorded by a CCD camera with various side wall lengths L at different side wall separation distances D. Results show that, as the length of the side wall increases, the change in behavior of the flame height can be categorized into two regimes: (1) the flame-entrainment-controlled regime in which flame height increases with side wall length for “(half) axisymmetric fire” but independent of side wall length for “wall fire”; and (2) the combustion-efficiency-controlled regime where the flame heights for both these two fire types decrease with side wall length due to decrease of the combustion efficiency inside the fire room, for L = 3D or greater. A global parameter K   is then proposed based on scaling analysis for the air entrainment of the flame with side wall length, in relation to characteristic length scales ℓ1ℓ1 and ℓ2ℓ2 of the window, which well collapse the experimental data for different window dimensions, side wall lengths and separation distances.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Heat and Mass Transfer - Volume 78, November 2014, Pages 17–24
نویسندگان
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