کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4920928 1429212 2017 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Temperature and velocity distributions from numerical simulations of ceiling jets under unconfined, inclined ceilings
ترجمه فارسی عنوان
توزیع دما و سرعت از شبیه سازی های عددی جت های سقف تحت سقف های غیرقابل انعطاف، شیب دار
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی عمران و سازه
چکیده انگلیسی
Numerical simulations of ceiling jets under unconfined, inclined ceilings were conducted with the open-source code FireFOAM. A range of ceiling inclinations, 0-30° was considered with a 14 kW convective heat release rate (HRR) heptane fire used as the plume source, and the ceiling mid-point clearance from the top of the 0.228 m diameter burner kept fixed at 0.89 m. The predicted temperature and velocity in the developing ceiling jets were compared against the experimental data and empirical correlations. Temperature and velocity predictions on the elevated side of the ceiling are in general agreement with experimental data. Flow reversal in the lower side of the ceiling was predicted with good confidence, and comparison with experimental data was found to be reasonable. Following existing convention in the literature, the predicted results were non-dimensionalized using the convective HRR, ceiling height and radial distance from the ceiling mid-point. Comparison of the non-dimensional data on the elevated ceiling side showed better agreement for temperature against the correlation, whereas predicted velocity data showed a wider spread around the correlation values.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Fire Safety Journal - Volume 91, July 2017, Pages 461-470
نویسندگان
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