کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
652802 885057 2006 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Experimental and numerical investigation of convection heat transfer in a rectangular channel with angled ribs
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
پیش نمایش صفحه اول مقاله
Experimental and numerical investigation of convection heat transfer in a rectangular channel with angled ribs
چکیده انگلیسی

Forced convection heat transfer of air in a rectangular channel with 45° ribs on one wall was investigated experimentally and numerically. The stainless steel test section was 39.3 mm × 39.3 mm × 4 mm and the ribs were 1 mm × 0.8 mm with 4 mm between ribs. The tests investigated the effects of air mass flow rate on the convection heat transfer enhancement with the ribs. Comparisons between the experimental and numerical results showed that the SST k–ω turbulence model was more suitable for the convection heat transfer in such channels than the RNG k–ε turbulence model. Other rectangular channels with different ribs angles and different spacings between ribs on the wall were investigated using the CFD code FLUENT6.1 with the SST k–ω turbulence model. The numerical model was 40 mm × 10 mm × 4 mm and the ribs were 1 mm × 1 mm with angles of 90°, 60°, 45°, 30°, 20°, 10° and 0°. The numerical results indicate that the heat transfer coefficients were largest with the 60° ribs, but the channel with the 20° ribs had the best overall thermal/hydraulic performance considering the heat transfer and the pressure drop when the spacing between ribs was 4 mm. The average heat transfer coefficients increase with increasing mass flow rates and decreasing the spacings. The rectangular channel with 20° ribs with 1–2 mm spacing ribs had the best overall thermal/hydraulic performance.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Experimental Thermal and Fluid Science - Volume 30, Issue 6, June 2006, Pages 513–521
نویسندگان
, ,