کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7054020 1458014 2018 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Investigation on heat transfer characteristics of falling liquid film by planar laser-induced fluorescence
ترجمه فارسی عنوان
بررسی ویژگی های انتقال حرارت فیلم سقوط مایع توسط فلورسانس ناشی از لیزر فلزی
کلمات کلیدی
سقوط فیلم مایع، فلورسانس ناشی از لیزر فلورسانس، استخراج شدت فلورسانس، ویژگی های انتقال حرارت، همبستگی انتقال حرارت،
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
چکیده انگلیسی
Falling liquid film evaporation is widely used in many industrial applications due to its efficient heat transfer characteristics. In this paper, a quantitative thermometry technique based on planar laser-induced fluorescence (PLIF) was applied to analyze the heat transfer characteristics of falling liquid film with high spatiotemporal resolution. The optimal gray values extraction method was proposed for the calibration of temperature-fluorescence intensity. The quantitative calculation of convective heat transfer coefficient and Nusselt number were conducted based on the liquid film temperature field distribution which was measured by PLIF and the trends of them were shown in different range of temperature and Reynolds number. Finally, the heat transfer correlation was proposed and the heat transfer characteristics of falling liquid film was analyzed. The quantitative correlations analysis shows that most of the correlations are more suitable for the liquid film with low Prandtl number, and the Nusselt number tends to decrease when the temperature of the liquid film increases at the constant flow rate.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Heat and Mass Transfer - Volume 126, Part A, November 2018, Pages 715-724
نویسندگان
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