کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
651002 1457398 2016 13 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Local heat transfer distribution between smooth flat surface and impinging incompressible air jet from a chevron nozzle
ترجمه فارسی عنوان
توزیع انتقال حرارت محلی بین سطح صاف و جت هوا غیر متراکم از یک نازل شفرون
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
چکیده انگلیسی
Influence of chevron nozzle on local heat transfer distribution over a flat plate impinged by incompressible jets is studied for Reynolds numbers of 28,000, 35,000 and 40,000. Ten different chevron nozzle configurations are studied with a pipe diameter of 10.8 mm. Thin metal foil technique is used with IR camera to measure the wall temperature at nozzle to plate distances (z/d) from 1 to 10. An increase in the local Nusselt number by 26-38% compared to that with circular pipe is measured. It is observed that N10 nozzle (with number of chevron tips n = 8 and chevron tip angle θ = 10°) provides best heat transfer performance. A correlation for the average heat transfer is proposed in present study. A multiplication factor is also introduced to predict local Nusselt number for N10 nozzle.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Experimental Thermal and Fluid Science - Volume 78, November 2016, Pages 124-136
نویسندگان
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