کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
661538 1458176 2006 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Behaviour of a heavy fuel oil droplet on a hot surface
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
پیش نمایش صفحه اول مقاله
Behaviour of a heavy fuel oil droplet on a hot surface
چکیده انگلیسی

When heavy fuel oil sprayed in droplets burns in water heating boilers, there are cases when the zones of incomplete combustion are present. The volatile compounds and tar contained in the droplets burn out there and the carbon starts to accumulate on the pipes of the screen. Combustion of a fuel droplet on a solid surface is less investigated than that of the droplet falling down in hot air. In this work, the burnout of a droplet of a heavy fuel oil has been measured on a hot surface whose temperature varies in the interval from 400 to 700 °C. Times of evaporation of volatile compounds and burnout of the resulting carbon residue were measured. Changes of the form of the carbon residue depending on the surface temperature were recorded. Ceramic, quartz and stainless steel surfaces were used. The effect of surface roughness was additionally examined. In the case of a droplet of the heavy fuel oil dropped on a hot surface, heat transfer into the droplet is very sudden. The surface wetting condition is important, as it determines evaporation and boiling. Another difference from a freely falling droplet is oxidation of the pure coke because the oxygen diffusion is possible only from one side of the space.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Heat and Mass Transfer - Volume 49, Issues 5–6, March 2006, Pages 1050–1057
نویسندگان
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