کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7054744 1458020 2018 14 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Optimal design of the semi-dimple vortex generator in the fin and tube heat exchanger
ترجمه فارسی عنوان
طراحی مطلوب ژنراتور گردابی نیمه کمینه در مبدل حرارتی باله و لوله
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
چکیده انگلیسی
The fin and tube heat exchanger with a semi-dimple pair is numerically studied in terms of the air side's thermal performance. The investigated parameters consist of the diameter, attack angle and the placed location of the semi-dimple. The results show that the 30° attack angle, 5.5 mm vertical distance and 7.5 mm horizontal distance can perform the highest j/f ratio or “goodness parameter” of every semi-dimple's diameter. Additionally, the thermal performance of the fin with a semi-dimple pair is also compared with that of the fin with existing semi-dimples and the plain fin within the Reynolds number ranging from 813 to 4019. Obviously, the existing semi-dimple exhibits the highest heat transfer coefficient and pressure drop. However, the semi-dimples' pair demonstrates a goodness factor of 33-37% greater than the existing semi-dimples and 15-20% greater than the plain fin, approximately.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Heat and Mass Transfer - Volume 120, May 2018, Pages 1173-1186
نویسندگان
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