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Experiments on the flow of a turbulent fluid in a duct affected by diamond obstacles with aligned and staggered arrangements | ||
| Journal of Heat and Mass Transfer Research | ||
| مقالات آماده انتشار، پذیرفته شده، انتشار آنلاین از تاریخ 17 آبان 1404 | ||
| نوع مقاله: Full Length Research Article | ||
| شناسه دیجیتال (DOI): 10.22075/jhmtr.2025.35946.1640 | ||
| نویسنده | ||
| Sarah Nashee* | ||
| nassiriyah | ||
| تاریخ دریافت: 26 آبان 1403، تاریخ بازنگری: 08 آبان 1404، تاریخ پذیرش: 17 آبان 1404 | ||
| چکیده | ||
| The convection heat transfer flow of air in a rectangular duct with and without diamond obstacles arranged in two ways (aligned and staggered) was experimentally examined in this work. The purpose of the diamond obstacles was to enhance heat transfer within the duct. A variety of turbulent conditions were utilized for the tests.(Re=10000–35000). Pitch to obstacle height ratios of 4, 5, and 6 were employed with aluminum barriers at height ratios of 0.16, 0.25, and 0.3. These barriers improved heat transfer by enhancing the mixing process between air and the heated walls, according to the experiments' findings. This is seen when the barriers apply with (e/H) = 0.3 and (p/e) = 6 for the two configurations. The staggered configuration is thought to provide the best enhancement of thermal performance equal to 174 % at Re=10,000 while aligned arrangement is 156% at the same conditions. Regarding the pressure drop, the findings demonstrate that the staggered arrangement yields the highest friction factor values for all investigated velocities, as well as the highest values for the elevation and pitch ratios, it reaches to 0.14 at Re=10,000 for staggered and 0.122 for aligned. | ||
| کلیدواژه‌ها | ||
| Diamond obstacles؛ turbulent flow؛ thermal enhancement؛ friction factor | ||
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