کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7046254 | 1457098 | 2018 | 33 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Experimental investigation on heat transfer enhancement in a circular tube with equilateral triangle cross sectioned coiled-wire inserts
ترجمه فارسی عنوان
بررسی تجربی بر بهبود انتقال حرارت در لوله مدور با صلیب مثلث متساوی الاضلاع برش درج فایل های داغ سیم
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کلمات کلیدی
درج سیم پیچ خورده، افزایش انتقال حرارت، انتقال گرما،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
جریان سیال و فرایندهای انتقال
چکیده انگلیسی
The thermo-hydraulic performance of coiled-wire inserted in a tube was experimentally investigated. The wire inserts have equilateral triangular cross-sections; they were coiled in a specific way to ensure that a vertex of the triangle was oriented to face the incoming air flow. The coiled-wires were installed with a 1â¯mm separation from the inner tube wall so that the heat transfer enhancement due to the viscous sublayer disturbance could be investigated. In total, six different coiled-wire configurations (three different pitch-to-diameter ratios: P/Dâ¯=â¯1, P/Dâ¯=â¯2 and P/Dâ¯=â¯3 and two different ratios of triangle side-length to tube diameter: e/Dâ¯=â¯0.0714 and e/Dâ¯=â¯0.0892) were chosen for the experiment. To determine the effect of triangle position on thermal performance, the results of present study were compared with a previous study results. The maximum thermal performance is approximately 1.67 times that for a smooth tube was observed for a wire with ratios of e/Dâ¯=â¯0.0892, P/Dâ¯=â¯1 and 11-18% more heat transfer enhancement was achieved than the previous work results. In conclusion, to enhance heat transfer, a coiled-wire that a vertex of the triangle is oriented to face the flow can be widely applied wherever heat exchangers with tubes are used.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Thermal Engineering - Volume 131, 25 February 2018, Pages 686-695
Journal: Applied Thermal Engineering - Volume 131, 25 February 2018, Pages 686-695
نویسندگان
Orhan Keklikcioglu, Veysel Ozceyhan,