کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7196498 | 1468345 | 2017 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Heat transfer in turbulent tube flow inserted with loose-fit multi-channel twisted tapes as swirl generators
ترجمه فارسی عنوان
انتقال گرما در جریان لوله ای متورم قرار داده شده با نوارهای پیچیده چند کاناله شبیه به عنوان ژنراتورهای چرخش
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کلمات کلیدی
انتقال گرما، افزایش انتقال حرارت، نوار پیچ خورده کانال چند کاناله، جریان چرخشی،
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی مکانیک
چکیده انگلیسی
Heat transfer and flow behaviors in three-dimensional circular tubes with loose-fit multiple channel twisted tapes were numerically studied. The investigation was examined for Reynolds numbers (Re) ranging from 5000 to 15,000, by using air as testing fluid. Effects of the multiple channel number (N=2,3, and 4), clearance ratio (CR=0.0, 0.025, 0.05, and 0.075) on heat transfer enhancement and flow friction were examined. The numerical results indicate that the tubes with loose-fit multiple channel twisted tapes perform higher heat transfer rates than the plain tube. The enhanced heat transfer rate is escorted with larger pressure drop. Both heat transfer and pressure drop increase with increasing multiple channel number (N) and decreasing clearance ratio (CR). Heat transfer augmented by the loose-fit multiple channel twisted tape with N=4 is higher than those enhanced by the ones with N=2 and 3 by around 9.5-17.8% and 5.8-7.8%, respectively. In addition, the loose-fit multiple channel twisted tapes with clearance ratio of 0.025, 0.05, and 0.075 give lower heat transfer rates than the one with CR=0.0 by around 8.4%, 17.5%, and 28.8%, respectively.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Theoretical and Applied Mechanics Letters - Volume 7, Issue 6, November 2017, Pages 372-378
Journal: Theoretical and Applied Mechanics Letters - Volume 7, Issue 6, November 2017, Pages 372-378
نویسندگان
Suttisak Kunlabud, Varesa Chuwattanakul, Vichan Kongkaitpaiboon, Pitak Promthaisong, Smith Eiamsa-ard,