کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
662655 1458148 2008 15 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Heat transfer augmentation along the tube wall of a louvered fin heat exchanger using practical delta winglets
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
پیش نمایش صفحه اول مقاله
Heat transfer augmentation along the tube wall of a louvered fin heat exchanger using practical delta winglets
چکیده انگلیسی
Delta winglets are known to induce the formation of streamwise vortices and increase heat transfer between a working fluid and the surface on which the winglets are placed. This study investigates the use of delta winglets to augment heat transfer on the tube surface of louvered fin heat exchangers. It is shown that delta winglets placed on louvered fins produce augmentations in heat transfer along the tube wall as high as 47% with a corresponding increase of 19% in pressure losses. Manufacturing constraints are considered in this study whereby piercings in the louvered fins resulting from stamping the winglets into the louvered fins are simulated. Comparisons of measured heat transfer coefficients with and without piercings indicate that piercings reduce average heat transfer augmentations, but significant increases still occur with respect to no winglets present.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Heat and Mass Transfer - Volume 51, Issues 9–10, May 2008, Pages 2346-2360
نویسندگان
, ,