|本期目录/Table of Contents|

[1]徐建民 雷斌 李智勇 黄伟 陈聪.换热管内置分段式弹簧流动与传热的数值模拟[J].武汉工程大学学报,2014,(03):42.
　XU Jian-min,LEI Bin,LI Zhi-yong,et al.Numerical simulation of flow field and heat transfer of sectional spring inserted in heat exchange tube[J].Journal of Wuhan Institute of Technology,2014,(03):42.
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换热管内置分段式弹簧流动与传热的数值模拟()
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《武汉工程大学学报》[ISSN:1674-2869/CN:42-1779/TQ]

卷:
期数:
2014年03期
页码:
42
栏目:
机电与信息工程
出版日期:
2014-03-31

文章信息/Info

Title:
Numerical simulation of flow field and heat transfer of sectional spring inserted in heat exchange tube
作者:
徐建民 雷斌 李智勇 黄伟 陈聪
(武汉工程大学机电工程学院,湖北 武汉 430205)
Author(s):
XU Jian-min;  LEI Bin;  LI Zhi-yong;  HUANG Wei;  CHEN Cong
(School of Mechanical & Electrical Engineering, Wuhan Institute of Technology, Wuhan 430205, China)
关键词:
分段式弹簧; 强化传热; 数值模拟
Keywords:
sectional spring;  enhanced heat transfer;  numerical simulation
分类号:
TQ051.501
DOI:
-
文献标志码:
A
摘要:
针对内置弹簧换热管在强化传热过程中产生较大阻力的问题，提出了一种插入分段式弹簧的方法，并通过Fluent软件对内置不同长度的弹簧换热管某一截面处的流动特性进行数值模拟，分别取每段弹簧的长度分别为50mm、100mm、150mm、200mm，得到了在内置不同长度弹簧的换热管内某一截面处的速度场；然后分别取不同丝径和圈径的分段式弹簧，对换热管内某一截面的流体径向速度场进行数值模拟，研究弹簧的丝径与圈径对强化传热的影响。结果表明：在换热管两端插入分段式弹簧使得管内流体径向速度提高了2~3倍，加快了管内壁区域流体的流动，使得边界层变薄，不仅加强了边界层流体的扰动，而且一定程度上降低了流体流动的阻力，从而提高了换热效率。在雷诺数相同时，内置分段式弹簧换热管相对于光管Nu数提高了2~4倍；随着丝径和圈径的增大，强化传热效率得到提高而流动阻力随着相应增加。
Abstract:
To investigate the problem of the resistance increasing in the process of enhancing heat transfer, a method based on inserting the sectional spring was put forward. The flow characteristics of a cross-section were simulated using FLUENT software. The velocity fields within a cross-section of the inserted sectional springs with different length of the heat exchange tubes were obtained after the length of each sectional spring was set as 50mm,100mm,150mm,200mm. By taking different wire diameter and circle diameter of the sectional springs, the radial velocity of fluid field within the heat exchange tube was simulated. The results show that inserting the sectional springs into both ends of heat exchange tube increases the radial velocity of the fluid 2 - 3 times, accelerates the fluid flow in the inner wall region, makes the boundary layer thinner, which not only strengthens the perturbation of boundary layer, but also reduces the flow resistance to some extent, thus improving heat transfer efficiency. Under the conditions of the same Reynolds number, the Nusselt number in the heat exchange tube of inserted sectional spring is higher 2 - 4 times than that in the plain tube. With the increase of wire diameter and circle diameter, heat transfer efficiency is improved and the flow resistance is increased

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期：作者简介：徐建民（1965-），男，湖北武汉人，教授，硕士.研究方向：新型高效化工设备的研究与开发.Sheet3Sheet2Sheet1
更新日期/Last Update: 2014-03-12