Simulation on heat transfer and flow characteristics of rhombus heat transfer surface with elliptical tube bundles

被引：0
|
作者：
Yuan B. [1 ]
Wang P. [1 ]
Du W. [1 ]
机构：
[1] School of Energy and Power Engineering, Shandong University, Jinan, 250061, Shandong
来源：
Du, Wenjing (wjdu@sdu.edu.cn) | 1600年 / Materials China卷 / 67期
关键词：
Elliptical tube bundles; Fluid flow; Heat transfer; Numerical simulation;
D O I：
10.11949/j.issn.0438-1157.20161539
中图分类号：
学科分类号：
摘要：
Rhombus heat transfer surface with staggered circular tubes bundles (CTB)performed high heat transfer capacity, large fluid flow resistance and high efficiency in ash blowing.Based on that, a new rhombus heat transfer surface with staggered elliptical tube bundles (ETB)was proposed.The new heat transfer surface maintained the high heat transfer coefficient and efficiency in ash blowing of CTB, which also showed lower resistance characteristic.2D numerical simulations of rhombus heat transfer surface with CTB and ETB were presented to conduct improving the performance in heat transfer and fluid flow.The effects of different upwind angels (-45°, 0°, 45°)of ETB were discussed.To obtain an understanding of the physical behavior of thermal and fluid flow, different Reynolds numbers ranging from 3000 to 21000 were calculated.Entropy generation principle was used to investigate the heat transfer performance.Results showed that compared with CTB and other ETB, ETB with 0° upwind angel had higher heat transfer coefficient and lower flow resistance, comprehensive properties of which was better. © All Right Reserved.
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页码：136 / 141
页数：5
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