Numerical Analysis of Heat and Flow Characteristics of Decaying Flow in Different Geometries Created Externally in a Horizontal Pipe

Year 2022, , 414 - 424, 15.06.2022

Ahmet Numan Özakın , İlhan Volkan Öner

https://doi.org/10.31466/kfbd.1085259

Cited By: 1

Abstract

In this study, a numerical model was designed to examine turbulent flow induced by the use of three different swirl generators (Triangular-Circular-Square) attached at the pipe inlet. In this respect, numerical analyses on a horizontal pipe with a constant heat flux of 1000 W/m2 were done at three different Reynolds numbers: 5000, 10000, and 15000 in the CFD environment. According to the results of the study, the flow through the triangular swirl generator showed the best cooling performance, although it caused relatively high pressure drop. The highest Nusselt number for triangular swirl generator was determined to be approximately 51.88 at 15000 Reynolds numbers.

Keywords

Heat transfer enhancement, swirl flow, swirl generator

Yatay Bir Boruda Dışarıdan Oluşturulan Farklı Geometrilerdeki Dönel Akışın Isı ve Akış Karakteristiklerinin Sayısal Analizi

Abstract

Bu çalışmada, boru girişine bağlı üç farklı girdap üretecinin (Üçgen-Dairesel-Kare) kullanılmasıyla indüklenen türbülanslı akışı incelemek için sayısal bir model tasarlanmıştır. Bu doğrultuda 1000 W/m2 sabit ısı akışına sahip yatay bir boru üzerinde sayısal analizler HAD ortamında 5000, 10000 ve 15000 olmak üzere üç farklı Reynolds sayısında yapılmıştır. Çalışmanın sonuçlarına göre, nispeten yüksek basınç düşüşüne neden olmasına rağmen, üçgen girdap üretecinden geçen akış en iyi soğutma performansını gösterdi. Üçgen girdap üreteci için en yüksek Nusselt sayısı 15000 Reynolds sayısında yaklaşık 51.88 olarak tespit edilmiştir. 

Keywords

Isı transferi iyileştirme, dönel akış, dönel akış oluşturucu

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