کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4992018 1457119 2017 40 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Numerical Analysis for Saving Fin Material in Helical Segmented-Tubes
ترجمه فارسی عنوان
تجزیه و تحلیل عددی برای صرفه جویی مواد فین در لوله های مخروطی هلالی
کلمات کلیدی
زاویه قطع، صرفه جویی در مواد، لوله فندک، شبیه سازی عددی،
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
چکیده انگلیسی
A numerical analysis is carried out in a small finned tube bank for several cutoff angles (30°, 45°, 60°, and 90°) at the rear part of helical segmented-tubes. Numerical simulations are undertaken using the Reynolds Averaged Navier-Stokes Equations approach. The turbulence effect is modeled with the Re-Normalization Group k-ε model and the finned tube geometry is represented by means of cut-cell method. Numerical results of these proposals are compared to a benchmark case (uncut fin case). Predictions show transport properties (energy and momentum) similar for cutoff angles less than (or equal to) 60°, since flow separation occurs nearly at this angle. Variations in heat transfer are less than 1% for 45° cutoff angle (fin material is reduced 25%) and less than 3.37% for 60° cutoff angle (fin material is reduced 33%). Therefore, finned tubes with cutoff angles of either 60° or 45° are recommended because their heat transfer and aerodynamics are approximately equal to those of benchmark case.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Thermal Engineering - Volume 110, 5 January 2017, Pages 306-317
نویسندگان
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