Year 2021, Volume , Issue 23, Pages 401 - 414 2021-04-30

Kanatlı-Borulu Isı Değiştiricilerinde Çukurlu/Çıkıntılı Kanat ile Isı Transfer Performansının Arttırılması

Ahmet Ümit TEPE [1]


Bu çalışmada kanatlı-borulu ısı değiştiricisinde çukurlu/çıkıntılı kanatın ısı transfer performansına ve akış karakteristiklerine etkisi sayısal olarak incelenmiştir. En uygun tasarım parametresini belirlemek için kanat üzerine dairesel ve 0,667 ile 1,50 olmak üzere iki farklı ovallik oranlı (a/b) çukurlar çift sıralı olarak yerleştirilerek ısı transfer performansına etkisinin araştırılmıştır. Dairesel çukurun çapı 2,8 mm olarak belirlenmiştir. Oval çukurların kesit alanı ise dairesel çukurla eşit tutulmuştur. Hesaplamalar 500, 1000, 1500 ve 2000 olmak üzere 4 farklı Reynold (Re) sayısında laminar akış rejiminde yapılmıştır. Sayısal hesaplamalar Ansys Fluent ile RNG k-ε türbülans modeli kullanılarak gerçekleştirilmiştir. Ortalama Nusselt sayısı ((Nu) ̅), yüzey üzerinde yanal ortalamalı Nu sayısı dağılımları, termal performans faktörü (TPF) ve akış karakteristikleri ayrıntılı olarak incelenmiştir. Sonuçlar çukur olmayan düz yüzeyli kanatçık ile karşılaştırılmıştır. Sayısal sonuçlar, yüzey üzerine yerleştirilen çukurların/çıkıntıların düz yüzeye göre ısı transferini %26,63’e kadar arttıracağını ortaya koymuştur. Bununla birlikte, TPF incelendiğinde ısı transferi artışında en uygun tasarımın dairesel çukurlu/çıkıntılı kanat tasarımının olduğu tespit edilmiştir.
Isı Değiştirici, Isı Transferi, Girdap Üreteci, Hesaplı Akışkanlar Dinamiği
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Primary Language tr
Subjects Engineering
Journal Section Articles
Authors

Orcid: 0000-0001-7626-6348
Author: Ahmet Ümit TEPE (Primary Author)
Institution: SİNOP ÜNİVERSİTESİ
Country: Turkey


Dates

Publication Date : April 30, 2021

APA Tepe, A . (2021). Kanatlı-Borulu Isı Değiştiricilerinde Çukurlu/Çıkıntılı Kanat ile Isı Transfer Performansının Arttırılması . Avrupa Bilim ve Teknoloji Dergisi , (23) , 401-414 . DOI: 10.31590/ejosat.874885