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بررسی عددی انتقال حرارت و افت فشار در جریان عرضی از روی دسته لوله های بیضی شکل
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Abstract: (980 Views) |
The main objective of this study is to investigate the fluid flow and heat transfer around a bundle of tubes with elliptical cross-section. The studied parameters include the shape of the tubes, presence or absence of blades, tube configuration, thermal boundary conditions, surface boundary conditions (such as surface roughness), fluid temperature and fluid velocity. Therefore, to investigate heat transfer characteristics, a numerical simulation is presented to express the relationship between heat transfer and above-mentioned parameters. In this study, fluid flow and heat transfer were simulated around tubes with elliptical shapes and important parameters were specified. The parameters such as the angle of attack, Reynolds number and geometric parameters of the flow are investigated in the present study. The outcome results were compared and evaluated with [1], which are in good agreement with the experimental results in [1]. Results show that by increasing Reynolds number, Nusselt number increases and coefficient of friction decreases. In addition, a comparison was made between flow characteristics at different angles to determine the proper angle of attack in each range of Reynolds numbers. . |
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| Keywords: Heat exchanger, Heat transfer, Tube bundle |
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Full-Text [PDF 755 kb]
(169 Downloads)
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Type of Study: Research |
Subject:
Heat and Mass Transfer
Received: 2017/11/12 | Accepted: 2018/04/21 | Published: 2018/09/19
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