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TÜRBÜLANSLI AKIŞTA ISI TRANSFERİNİN BLOKLU YÜZEYLER İLE ARTTIRILMASI

Heat Transfer Enhancement in Turbulent Flows by Blocked Surfaces

Journal Name:

  • Uludağ Üniversitesi Mühendislik-Mimarlık Fakültesi Dergisi

Publication Year:

  • 2013

Key Words:

Keywords (Original Language):

Author NameUniversity of AuthorFaculty of Author
Abstract (2. Language): 
In this study, the heat transfer analyses over flat and blocked surfaces were carried out in turbulent flow under the influence of the block height. A constant-temperature hot wire anemometer was used to the velocity and turbulent intensity measurements, while temperature values were measured by copper-constantan thermocouples. The average Stanton numbers for block heights of 15 and 25 mm were higher than those of flat surface by %38 and %84, respectively. The results showed that the presence of the blocks increased the heat transfer and the enhancement rose with block heights.
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Abstract (Original Language): 
Bu çalışmada, düz ve bloklu yüzeyler üzerinde türbülanslı akış için ısı transferi analizi blok yüksekliğine bağlı olarak yapılmıştır. Hız ve türbülans yoğunlukları ölçümlerinde sabit sıcaklıklı bir kızgın tel anemometresi kullanılırken, sıcaklık değerleri termal çiftler ile ölçülmüştür. 15 ve 25 mm blok yüksekliklerine sahip bloklu yüzey ortalama Stanton sayılarının, düz yüzey değerlerinden sırasıyla %38 ve %84 daha fazla olduğu tespit edilmiştir. Bu sonuçlar, blokların varlığının ısı transferini önemli derecede arttırdığını ve ısı transferinin blok yüksekliği ile arttığını göstermektedir.
FULL TEXT (PDF): 
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  • 1
61-67
  • Turkish

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