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KANAL İÇERİSİNE YERLEŞTİRİLEN KARE KESİTLİ ENGELİN ISI TRANSFERİNE ETKİLERİNİN DENEYSEL OLARAK İNCELENMESİ

EXPERIMENTALLY INVESTIGATION OF THE EFFECT OF A SQUARE CROSS-SECTIONAL OBSTACLE LOCATED IN A CHANNEL ON HEAT TRANSFER

Journal Name:

  • Sigma Mühendislik ve Fen Bilimleri Dergisi

Publication Year:

  • 2006

Key Words:

Keywords (Original Language):

Author NameUniversity of AuthorFaculty of Author
Abstract (2. Language): 
In the present study, the effects of a square cross-sectional obstacle, located before the heated zone of a rectangular channel normal to the flow direction and parallel to the heated surface, on heat transfer and friction characteristics are investigated, experimentally. The experiments were conducted for Re number in the range of 3.103 <Re<15.103 . It was seen that, the size and location of the obstacle, which can be changed vertically and horizontally, affect heat transfer. Optimum parameters that cause maximum heat transfer enhancement were determined. 142 % heat transfer enhancement was obtained with the obstacle for optimum conditions while increase in friction factor was 200 %.
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Abstract (Original Language): 
Bu çalışmada, dikdörtgen kesitli bir kanalın içerisinde –ısıtma bölgesi önüne- akışa dik ve kanal tabanına paralel olarak yerleştirilen kare kesitli bir engelin ısı transferi ve sürtünme kayıp karakteristikleri üzerindeki etkileri deneysel olarak incelenmiştir. Reynolds sayısının 3.103 <Re<15.103 aralığında incelendiği çalışmada, yatay ve düşey doğrultuda konumu değiştirilen engelin konumunun ve boyutlarının ısı transferi üzerinde etkili olduğu ve maksimum ısı transferinin elde edildiği optimum parametreler tespit edilmiştir. Kanal içerisine yerleştirilen engelin-optimum konum ve boyutta- ısı transferinde %142 gibi bir iyileşme sağladığı ancak, sürtünme kayıplarında %200 oranında bir artışın olduğu belirlenmiştir.
FULL TEXT (PDF): 
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  • 3
65-73
  • Turkish

REFERENCES

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