کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
657734 1458064 2014 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Numerical investigation of heat transfer enhancement in a fin and tube heat exchanger using vortex generators
ترجمه فارسی عنوان
بررسی عددی افزایش انتقال حرارت در یک مبدل حرارتی بادی و با استفاده از ژنراتورهای گرداب
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
چکیده انگلیسی

In presented work, numerical analysis of heat transfer and pressure drop using vortex generators in fin and flat tube heat exchanger has been presented. Conjugate heat transfer 3D numerical model has been developed and successfully carried out. Rectangular winglets were set in pairs, with downstream orientation. The effects of impact angles of 5°, 10° and 20° as well as winglet height were examined through Nu number and j/f factor. Reynolds number is ranged from 350 to 2200. The numerical results showed that in the range of the present study, the variation of these parameters can result in the increase of heat transfer but with a penalty of pressure drop. Pressure drop increases for larger impact angles and with winglet height. Optimum heat transfer without significant pressure drop increase gives the vortex generator geometry of 0.64 × 1.92 mm (i.e. winglet height equals 2/3 fin spacing) with impact angle 10°.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Heat and Mass Transfer - Volume 78, November 2014, Pages 662–669
نویسندگان
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