Hidrolik Çap Kullanarak Dairesel Kanal ve Gerçek Altıgen Kanal Sonuçlarının Karşılaştırılması

Dairesel kanallar için türetilmiş türbülanslı akış korelasyonlarının hidrolik çap kullanılarak altıgen kesitli kanallar için kullanılıp kullanılamayacağını görmek için ANSYS Fluent 17.0 yazılımı kullanılarak altıgen kanallardaki türbülanslı akış sayısal olarak incelenmiştir. 30o ile 90o arasında kanal yanal açıları ve 10×103Re50×103 arasındaki Reynolds sayısı parametreleri incelenmiştir. Türbülans modeli olarak standart k-ε modeli kullanılmıştır. Altıgen kesitli kanallar için Reynolds sayısına ve yanal açıya bağlı tam gelişmiş boyutsuz ısı transfer katsayısı olan Nusselt sayısı ve tam gelişmiş Darcy sürtünme faktörü için genel ifadeler önerilmiştir. Sonuçlar, altıgen kanal yanal açısının kanal boyunca basınç düşümünü ve kanaldaki ısı transfer katsayısını etkilediğini göstermiştir. Ayrıca sonuçlar =60o olan eşkenar altıgen kanalın minimum basınç düşüşü ve maksimum Nusselt sayısı verdiğini göstermiştir. Literatürde türbülanslı akış koşullarında dairesel kanallar için verilen korelasyonların gerçek altıgen kanal akışına göre %14 daha yüksek boyutsuz ısı transfer katsayısı olan Nusselt sayısı sağlayabileceği sonucuna varılmıştır.

A Comparison of Circular Duct and Real Hexagonal Duct Results Using Hydraulic Diameter

To see whether the turbulent flow correlations derived for circular ducts can be used for hexagonal cross-sectional ducts using hydraulic diameter, turbulent flow in hexagonal ducts is numerically investigated under constant wall temperature boundary condition using ANSYS Fluent 17.0 software. Investigated parameters are the Reynolds number between 10×103Re50×103 and side angle of the duct varying between 30o and 90o. Standard k-ε model is used as turbulence model. General expressions are proposed for fully developed dimensionless heat transfer coefficient Nusselt number and fully developed Darcy friction factor in terms of Reynolds number and side angle for hexagonal-shaped cross-sectional duct. Results show that side angle of hexagonal duct affects the pressure drop along duct and heat transfer coefficient in duct. Results point out that regular hexagonal duct, =60o, gives minimum pressure drop and maximum Nusselt number. It is concluded that correlations given in the literature for circular ducts in turbulent flow can give 14% higher dimensionless heat transfer coefficient, Nusselt number, than that of actual hexagonal duct flow.

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Bibtex @araştırma makalesi { politeknik768211, journal = {Politeknik Dergisi}, eissn = {2147-9429}, address = {Gazi Üniversitesi Teknoloji Fakültesi 06500 Teknikokullar - ANKARA}, publisher = {Gazi Üniversitesi}, year = {2021}, volume = {24}, number = {4}, pages = {1593 - 1604}, doi = {10.2339/politeknik.768211}, title = {A Comparison of Circular Duct and Real Hexagonal Duct Results Using Hydraulic Diameter}, key = {cite}, author = {Yılmaz, Umut Barış and Turgut, Oğuz} }
APA Yılmaz, U. B. & Turgut, O. (2021). A Comparison of Circular Duct and Real Hexagonal Duct Results Using Hydraulic Diameter . Politeknik Dergisi , 24 (4) , 1593-1604 . DOI: 10.2339/politeknik.768211
MLA Yılmaz, U. B. , Turgut, O. "A Comparison of Circular Duct and Real Hexagonal Duct Results Using Hydraulic Diameter" . Politeknik Dergisi 24 (2021 ): 1593-1604 <
Chicago Yılmaz, U. B. , Turgut, O. "A Comparison of Circular Duct and Real Hexagonal Duct Results Using Hydraulic Diameter". Politeknik Dergisi 24 (2021 ): 1593-1604
RIS TY - JOUR T1 - A Comparison of Circular Duct and Real Hexagonal Duct Results Using Hydraulic Diameter AU - Umut Barış Yılmaz , Oğuz Turgut Y1 - 2021 PY - 2021 N1 - doi: 10.2339/politeknik.768211 DO - 10.2339/politeknik.768211 T2 - Politeknik Dergisi JF - Journal JO - JOR SP - 1593 EP - 1604 VL - 24 IS - 4 SN - -2147-9429 M3 - doi: 10.2339/politeknik.768211 UR - Y2 - 2020 ER -
EndNote %0 Politeknik Dergisi A Comparison of Circular Duct and Real Hexagonal Duct Results Using Hydraulic Diameter %A Umut Barış Yılmaz , Oğuz Turgut %T A Comparison of Circular Duct and Real Hexagonal Duct Results Using Hydraulic Diameter %D 2021 %J Politeknik Dergisi %P -2147-9429 %V 24 %N 4 %R doi: 10.2339/politeknik.768211 %U 10.2339/politeknik.768211
ISNAD Yılmaz, Umut Barış , Turgut, Oğuz . "A Comparison of Circular Duct and Real Hexagonal Duct Results Using Hydraulic Diameter". Politeknik Dergisi 24 / 4 (Aralık 2021): 1593-1604 .
AMA Yılmaz U. B. , Turgut O. A Comparison of Circular Duct and Real Hexagonal Duct Results Using Hydraulic Diameter. Politeknik Dergisi. 2021; 24(4): 1593-1604.
Vancouver Yılmaz U. B. , Turgut O. A Comparison of Circular Duct and Real Hexagonal Duct Results Using Hydraulic Diameter. Politeknik Dergisi. 2021; 24(4): 1593-1604.
IEEE U. B. Yılmaz ve O. Turgut , "A Comparison of Circular Duct and Real Hexagonal Duct Results Using Hydraulic Diameter", Politeknik Dergisi, c. 24, sayı. 4, ss. 1593-1604, Ara. 2021, doi:10.2339/politeknik.768211