کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4994089 1458030 2017 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Single phase laminar flow and heat transfer characteristics of microgaps with longitudinal vortex generator array
ترجمه فارسی عنوان
خصوصیات انتقال گرما و انتقال حرارت تک فاز میکروگاپها با آرایه ژنراتور گردابی طولی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
چکیده انگلیسی
We study the integration of longitudinal vortex generators (LVGs) into microgaps for heat transfer augmentation via three-dimensional steady numerical simulations Firstly, the impacts of geometric parameters, including transverse spacing of LVG pairs, height of microgaps, and number of LVG pairs in the flow direction were considered. Then the heat transfer and flow resistance of LVG enhanced micro-gap were compared with smooth micro-gap. The results show that the flow resistance and heat transfer performance of LVGs enhanced microgaps decrease with increase in transverse spacing of LVGs. Microgaps with larger heights do not demonstrate a significant increase in heat transfer performance, but have much lower pressure drop. The microgap equipped with more LVG pairs has higher pressure drop and heat transfer coefficients. Finally, compared with the smooth microgap, the overall enhancement ratio of all studied LVGs enhanced microgaps increases with Re, and the overall enhancement ratios of specific LVGs enhanced microgap model is larger than one over the full range of Re being studied. The present study is intended to promote the development of new heat transfer enhancement technique in microgaps.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Heat and Mass Transfer - Volume 111, August 2017, Pages 484-494
نویسندگان
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