کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
662990 1458154 2007 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Heat transfer and friction characteristics for artificially roughened ducts with compound turbulators
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
پیش نمایش صفحه اول مقاله
Heat transfer and friction characteristics for artificially roughened ducts with compound turbulators
چکیده انگلیسی

An experimental investigation on heat and fluid flow characteristics of fully developed turbulent flow in a rectangular duct having repeated integral transverse chamfered rib-groove roughness on one broad wall has been carried out. Experiments encompassed the Reynolds number range of 3000–21,000; relative roughness pitch of 4.5–10, chamfer angle of 5°–30°, relative groove position of 0.3–0.6 and relative roughness height of 0.022–0.04. The effect of roughness parameters on Nusselt number and friction factor have been discussed and the results are compared with the results of square rib-grooved and smooth duct under similar flow conditions. The conditions for the best performance have been determined. Correlations for the Nusselt number and friction factor have been developed as a function of roughness parameters and flow Reynolds number.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Heat and Mass Transfer - Volume 50, Issues 23–24, November 2007, Pages 4845–4854
نویسندگان
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