کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4994439 | 1458033 | 2017 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Heat transfer and hydrodynamics of free water jet impingement at low nozzle-to-plate spacings
ترجمه فارسی عنوان
انتقال حرارت و هیدرودینامیک جابجایی جت آزاد در فاصله بین پانل های پلاستیکی کم
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کلمات کلیدی
جت جابجایی، دایره ای، صفحه تخت،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
جریان سیال و فرایندهای انتقال
چکیده انگلیسی
In this study, heat transfer and hydrodynamics of a free water jet impinging a flat plate surface are experimentally investigated. The effects of the nozzle-to-plate spacing, which is equal to or less than one nozzle diameter (H/d = 0.08-1), on the Nusselt number, hydraulic jump diameter, and pressure at the stagnation point are considered. The results show that the normalized stagnation Nusselt number, pressure, and hydraulic jump diameter are divided into two regions: Region (I) jet deflection region (H/d ⩽ 0.4) and Region (II) inertia dominant region (0.4 < H/d ⩽ 1). In region I, the normalized stagnation Nusselt number and hydraulic jump diameter drastically increase with decreasing the nozzle-to-plate spacing, since the stagnation pressure increases due to the jet deflection effect. In region II, the effect of the nozzle-to-plate spacing is negligible on the normalized stagnation Nusselt number and hydraulic jump diameter since the average velocity of the jet is constant, which means the jet deflection effect disappears. Based on the experimental results, new correlations for the normalized hydraulic jump diameter, stagnation Nusselt number, and pressure are developed as a function of the nozzle-to-plate spacing alone.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Heat and Mass Transfer - Volume 108, Part B, May 2017, Pages 2211-2216
Journal: International Journal of Heat and Mass Transfer - Volume 108, Part B, May 2017, Pages 2211-2216
نویسندگان
Abdullah M. Kuraan, Stefan I. Moldovan, Kyosung Choo,