Ece AYLI, Ender İNCE

7320

DİKDÖRTGEN KESİTLİ KANATÇIKLARIN ISI TRANSFERİNE OLAN ETKİSİ: DERLEME MAKALESİ

Bir çok mühendislik probleminde ısı transferi oranları önemli bir etkiye sahiptir. Otomotiv, havalandırma, elektronik soğutma, hava aracı gibi bir çok endüstriyel uygulama alanında ısı artımı, ekipmanlarda fazla ısınmaya neden olarak sistem hatalarına, kısa makine ömrüne, güvenilirliğin düşmesine ve bakım ihtiyacının artmasına neden olmaktadır. Bu tip problemlerin önüne geçilmesinde pasif soğutma teknikleri sıklıkla kullanılmaktadır. Bu derleme makalesinde yüksek verim ve düşük maliyet ile ısı transferi iyileştirmesi sağlayan pasif soğutma tekniklerinden olan dikdörtgen kanatçıklar araştırılmıştır.Ayrıca dikdörtgen kanatçıkların eğimli, delikli, aralıklı, hizalı ve kaydırılmış olarak kullanılmasının ısı transferine olan etkilerinin araştırıldığı bir çok makale de özetlenmiştir. Kanatçıklı yapılar ile ısı transferini arttırmak için tasarımcılar, kanatçık uzunluğu, kanatçık şekli, kanatçık genişliği, kanatçık sayısı, kanatçıklar arası mesafeler gibi bir çok parametreyi optimize etmek mecburiyetindedir. Bu optimizasyon sürecinde deneyim sahibi olmayan bir tasarımcı, ısı transferini arttırmak yerine, tasarladığı kanatçıklı yapı ile gelen havanın ısınan hava ile karışmasını engelleyip ısı transferi üzerinde tam tersi etki yaratabilmektedir. Bu derleme makalesi ıs transferiini dikdörtgen kanatçık kullanarak maksimize etmek isteyen tasarımcılar için bir rehber niteliğindedir ve literatürde bu konu ile yapılmış geniş bir spektrumu taramaktadır.
Anahtar Kelimeler:

Dikdörtgen kanatçık, delikli kanatçık, eğimli kanatçık, ısı transferi

REVIEW OF ENHANCEMENT OF HEAT TRANSFER FROM RECTANGULAR FIN ARRAYS

Heat transfer removal rate from surfaces is great importance in many engineering applications. For many industrial applications like automotive, air conditioning, electronic cooling, spacecraft and aircraft applications, internal heat generation can cause overheating problems that may result in system failure, short machine life, need of maintenance and low system reliability. To solve such problems passive cooling techniques are widely used. This article summarizes an extensive literature review of rectangular fin structures that is much-used heat transfer enhancement technique with a high efficiency rate and a low cost. Moreover, in this study not only solid rectangular fin structures are studied but also inclined, perforated and staggered type rectangular fin studies are summarized. To increase the heat transfer rates and Nusselt number distributions, designers should optimize the parameters such as fin number, fin shape, fin height, fin diameter and inter-fin distance ratio for all of the fin types. In the optimization process of those components, designers should have experience with the fin design procedure; without the necessary experience and knowledge, instead of increasing the heat transfer rates, fin surfaces can resist and block the incoming air flow which will affect heat transfer rate adversely. This review is a guideline for designers presenting how rectangular fin arrays are used to enhance heat transfer rates.
Keywords:

Rectangular fins perforated fin, inclined fin, interrupted fin, convective heat transfer,

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Mugla Journal of Science and Technology-Cover
  • ISSN: 2149-3596
  • Yayın Aralığı: Yılda 2 Sayı
  • Başlangıç: 2015
  • Yayıncı: Muğla Sıtkı Koçman Üniversitesi Fen Bilimleri Enstitüsü
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