کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
654110 885229 2010 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Experimental investigation of convective heat transfer and pressure loss in a round tube fitted with circular-ring turbulators
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
پیش نمایش صفحه اول مقاله
Experimental investigation of convective heat transfer and pressure loss in a round tube fitted with circular-ring turbulators
چکیده انگلیسی

This paper presents the effect of the circular-ring turbulator (CRT) on the heat transfer and fluid friction characteristics in a heat exchanger tube. The experiments were conducted by insertion of CRTs with various geometries, including three different diameter ratios (DR = d/D = 0.5, 0.6 and 0.7) and three different pitch ratios (PR = p/D = 6, 8 and 12). During the test air at 27 °C was passed through the test tube which was controlled under uniform wall heat flux condition. The Reynolds number was varied from 4000 to 20,000. According to the experimental results, heat transfer rates in the tube fitted with CRTs are augmented around 57% to 195% compared to that in the plain tube, depending upon operating conditions. In addition, the results also reveal the CRT with the smallest pitch and diameter ratios offers the highest heat transfer rate in accompany with the largest pressure loss.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Communications in Heat and Mass Transfer - Volume 37, Issue 5, May 2010, Pages 568–574
نویسندگان
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