بررسی عملکرد حرارتی و هیدرودینامیکی جریان جت برخوردی نانوسیال آب- Al2O3 در چاه حرارتی صفحه- پینی

نوع مقاله: مقاله علمی پژوهشی

نویسندگان

1 نویسنده مسئول، دانشجوی کارشناسی ارشد، دانشکده مهندسی مکانیک، پردیس دانشکده‌های فنی، دانشگاه تهران

2 دانشجوی کارشناسی ارشد، دانشکده مهندسی مکانیک، پردیس دانشکده های فنی، دانشگاه تهران

3 استاد، دانشکده مهندسی مکانیک، پردیس دانشکده‌های فنی، دانشگاه تهران

4 استادیار، دانشکده مهندسی مکانیک، پردیس دانشکده‌‌‌های فنی، دانشگاه تهران

5 دانشجو‌ی کارشناسی ارشد، دانشکده فیزیک، دانشگاه تهران

چکیده

در این پژوهش، عملکرد هیدرودینامیکی و مشخصات انتقال‌حرارت نانو‌سیال آلومینا در چاه‌حرارتی  مینیاتوری صفحه-‌ پینی بصورت عددی و آزمایشگاهی مورد بررسی قرار‌گرفت. چاه حرارتی از جنس آلومینیوم با دستگاه CNC ساخته و در محفظه‌ی پلکسی‌گلاس تعبیه شد. شار حرارتی ثابت kW/m2 125 به کف چاه حرارتی وارد گردید. محدوده عدد رینولدز بین 9/156 و 25/589 می‌باشد. چاه حرارتی به صورت سه بعدی مدل شد و با حل انتقال‌حرارت مماسی در آن خواص هیدرودینامیکی و انتقال‌حرارت مورد بررسی قرار‌گرفت. نتایج حاکی از آن است که افزایش غلظت حجمی نانوسیال آلومینا از 5/0 تا 2 درصد و افزایش عدد رینولدز باعث افزایش ضریب انتقال‌حرارت جابجایی، کاهش مقاومت حرارتی، یکنواختی ‌دمایی کف چاه‌حرارتی، افزایش عدد ناسلت و افزایش توان پمپاژ  نانوسیال نسبت به سیال پایه می‌شود.

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