Assessment of Heat Transfer and Friction Characteristics in Circular Pipe Utilizing Balls as Tabulators
DOI:
https://doi.org/10.31272/jeasd.2496الكلمات المفتاحية:
المضطربات الكروية، تعزيز انتقال الحرارة، عامل الأداء الحراري، الخصائص الحرارية الهيدروليكيةالملخص
يعد اضطراب التدفق أحد الأساليب الأكثر استخدامًا لتحسين نقل الحرارة. استخدمت هذه الدراسة المحاكاة العددية والاختبارات التجريبية لفحص تأثير المضطربات الكروية على خصائص احتكاك السوائل وانتقال الحرارة في أنبوب دائري. باستخدام طريقة الحجم المحدود، تم إجراء المحاكاة العددية بواسطة برنامج Ansys Fluent 19 R3. قسم الاختبار، وهو عبارة عن أنبوب نحاسي بطول 1 متر وقطر داخلي 24 مم، يعمل كأحد المكونات الأكثر أهمية لجهاز الاختبار التجريبي. يتم إدخال محركات كروية بأقطار مختلفة 10 و 15 و 20 ملم وأطوال فاصلة 20 سم في الأنابيب الدائرية. أصبحت نسبة قطر الكرة إلى قطر مسار التدفق الداخلي للأنبوب، نسبة اضطراب الكرة (BTR) = 0.41 و0.62 و0.83. تم استخدام الماء كسائل عمل برقم رينولدز من 3500 إلى 11500. تظهر النتائج اتفاقًا ممتازًا مع انحرافات أقل من 11٪. بلغ معامل الأداء الحراري الأقصى حوالي 1.18 و 1.24 و 1.4 للـ 0.41BTR و 0.62 و 0.83 على التوالي. تنتج المراوح الكروية زيادة في عامل الاحتكاك، وهذه الزيادة في النتائج التجريبية هي 52، 65 و 78% عند 0.41، 0.62 و 0.83 على التوالي. ويرتفع عامل الاحتكاك فجأة عند تجاوز BTR 0.62. كما يلاحظ أن هناك انخفاض تدريجي في الأداء الحراري عندما يكون نطاق أرقام رينولدز أعلى من 7500.
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التنزيلات
Key Dates
الإستلام
النسخة النهائية
الموافقة
النشر الالكتروني
منشور
إصدار
القسم
الرخصة
الحقوق الفكرية (c) 2025 Ali Shokor Golam, Ahmad Muneer El-Deen Faik, Hayder Mohammad Jaffal (Author)
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