Bir Isı Değiştiricisinde Su Bazlı Hibrit Nanoakışkan Kullanımının Termal ve Hidrolik Performans Üzerine Etkisinin Araştırılması

Bu çalışmada, su bazlı farklı CuO-Al2O3 hibrit nanoakışkan fraksiyonlarının termal ve hidrolik performans üzerindeki etkisini araştırmak üzere sabit ısı akısı altındaki yatay bir düz boruda sayısal analizler yapılmıştır. Sayısal modelde gelişmiş türbülanslı akışı şartlarını sağlamak için test bölgesinden önce akış gelişim bölgesi oluşturulmuştur. Türbülanslı akışı modellemek için k-ω Shear Stress Transport (SST) türbülans modeli kullanılmış ve 10.000 ila 100.000 arasında değişen Reynolds sayısı için analizler gerçekleştirilmiştir. Kullanılan nanoakışkanın termo-fiziksel özellikleri literatürdeki korelasyonlar ile hesaplanmıştır. Nanoakışkan hacim fraksiyonları toplamda, %2, 3, 4 ve 5 olacak şekilde konfigüre edilmiştir. Sonuç olarak, en yüksek termo-hidrolik performans, incelenen tüm Reynolds sayıları için her iki nanopartikülün hacim fraksiyonları birbirine yakın olduğu durumda elde edilmiştir. Ayrıca elde edilen sonuçlardan Al2O3'in hacim fraksiyonunun CuO'e kıyasla termo-hidrolik performans değeri üzerinde daha önemli bir etkisi olduğu görülmüştür. Elde edilen sonuçlar kullanılarak incelenen tüm konfigürasyonları kapsayan Nusselt sayısı ve sürtünme faktörleri için korelasyonlar geliştirilmiştir.

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Erciyes Üniversitesi Fen Bilimleri Enstitüsü Fen Bilimleri Dergisi-Cover
  • ISSN: 1012-2354
  • Yayın Aralığı: Yılda 3 Sayı
  • Başlangıç: 1985
  • Yayıncı: Erciyes Üniversitesi
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