بررسی رفتاری ابرشاره‌ هلیم مایع و کاربرد آن در مهندسی مکانیک

نوع مقاله : علمی ترویجی

نویسندگان

1 دانشجوی مهندسی مکانیک، دانشکده مهندسی، دانشگاه فردوسی مشهد

2 عضو هیئت علمی گروه مکانیک، دانشکده مهندسی، دانشگاه فردوسی مشهد

چکیده

دستیابی به بالاترین بازدهی در سیستم‌های سیالاتی نظیر نیروگاه‌ها، پمپ‌ها، مبدل‌‌ها، هواپیما و فضاپیماها تحول شکرفی در علم مکانیک سیالات ایجاد خواهد کرد. از طرف دیگر، لزجت و اتلاف حرارتی دو عامل اصلی در کاهش کارایی انواع سیستم‌های تبرید، پمپ‌ها، صنایع هوافضایی و مبدل‌های حرارتی هستند. به منظور دست‌یابی به این آرزو، سیالی که ضریب انتقال حرارت بالایی داشته و اثر لزجت در آن ناچیز باشد می‌تواند بسیار نقش‌آفرین باشد که این سیال به عنوان ابرسیال یا ابرشاره شناخته شده است. هدف از تحقیق پیشرو این است که ویژگی‌های سیالات ابرشاره، توانایی‌ها و پتانسل‌های آن‌ و پیشرفت‌های قابل تصور برای سیستم‌های مکانیکی را مورد بحث و بررسی قرار دهد. از آنجایی که هلیم مایع دارای خاصیت ابرشارگی است به طوری که دارای ضریب انتقال حرارت بالایی بوده و اثرات لزجت در آن تقریباً صفر است لذا ابتدا به بررسی خاصیت ابرشارگی گاز هلیم و کاربردهای قابل تصور برای آن پرداخته و سپس کاربردها و پتانسیل‌های موجود بیان خواهد شد.

کلیدواژه‌ها


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