کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4768652 | 1424960 | 2017 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Experimental study of flame spread over diesel and diesel-wetted sand beds
ترجمه فارسی عنوان
مطالعه تجربی شعله ای که روی تخت های ماسه ای دیزلی و دیزلی پوشانده شده است
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کلمات کلیدی
شعله پخش می شود سوخت دیزلی، دمای سطح، کنسرو مایع تابش شعله،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
چکیده انگلیسی
The experimental study focuses on the behaviors of two-dimensional flame propagation over diesel and diesel-wetted sand beds. Effects of the diesel depth, ignition position, fuel ratio of diesel volume to sand bed weight and sand diameter on the flame spread are analyzed. The results show that for wetted sand beds, the flame spread rate increases with increasing fuel ratio and decreasing sand diameter. The capillary rise effect still plays a significant role with different fuel ratios. Considering the flame spread rate, flame height, temperature distributions near fuel surface and heat fluxes around the fire, the controlling mechanisms of heat transfer are discussed. For the low fuel ratio, the flame spread over wetted sand beds is dominated by the capillary rise effect and heat conduction of sand beds. With increasing fuel ratio, the main controlling mechanism changes from flame radiation to the combined liquid convection and flame radiation. The spread rate for diesel ignited from pan edge is greater than that ignited from pan center for fuel depths (10-20Â mm). The flame spread rate increases due to the effect of flame radiation to the unburned fuel surface. For diesel cases ignited from pan center, the dominant mode of heat transfer to the unburned surface is by flame radiation for 2Â mm depth, while the controlling mechanism is liquid convection for deep layers (5-20Â mm). For diesel cases ignited from pan edge, flame radiation becomes the dominant heat transfer mode for the very thin and thick depths (2Â mm and 20Â mm), while the controlling mechanism is liquid convection for 5Â mm depth. For deeper fuel layers, the flame radiation generates its effect primarily by raising the fuel surface temperature through extensive preheating region. The present experimental results can provide practical guide for the combustion hazard of accidental fuel spills.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Fuel - Volume 204, 15 September 2017, Pages 54-62
Journal: Fuel - Volume 204, 15 September 2017, Pages 54-62
نویسندگان
Yanyun Fu, Zihe Gao, Jie Ji, Kaiyuan Li, Yongming Zhang,