کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4991130 1457108 2017 31 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effects of building concave structure on flame spread over extruded polystyrene thermal insulation material
ترجمه فارسی عنوان
اثرات ساختاری سازه مقعر بر شعله بر روی مواد عایق حرارتی پلی استایرن اکسترود شده
کلمات کلیدی
پلی استایرن اکسترود شده، مواد عایق حرارتی، ساختار سازه ی مخروطی، شعله پخش می شود انتقال گرما، مدل پیش بینی تاثیر،
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
چکیده انگلیسی
Extruded polystyrene (XPS) thermal insulation material is widely installed on building exterior wall for energy saving, and the concave structure is a typical structure of building facade in architectural design. In this paper, both experimental methods and theoretical analysis are employed to investigate effects of concave structure on flame spread behaviors of XPS foam. Firstly, the upward flame spread tests are conducted. Significant fluctuation of the XPS flame front is observed while the movement of the pyrolysis front is relatively stable. The concave structure promotes the upward flame spread of XPS. The flame spread rate increases by 0.37 folds with the rising of concave structure factor (П) from 0 to 1.6. The growth rate of flame spread rate is 27.76% for П from 0 to 0.8, while it is merely 7.33% with П rising from 0.8 to 1.6. Reduced influence of the increase in the concave structure factor on the flame spread rate is deduced. The mechanism of concave structure effect is revealed. Moreover, a prediction model that evaluates the influence of the concave structure on flame spread characteristics of XPS is established. The predicted results are consistent with the experimental ones. The results of this work contribute to the fire hazard assessment of XPS and fire safety design of concave building facade.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Thermal Engineering - Volume 121, 5 July 2017, Pages 802-809
نویسندگان
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