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[1]喻九阳,聂思皓,郑小涛,等.波纹管内层流脉动传热和阻力特性的数值研究[J].武汉工程大学学报,2013,(02):60-64.[doi:103969/jissn16742869201302013]
　YU Jiu yang,NIE Si hao,ZHENG Xiao tao,et al.Numerical analysis on heat transfer characteristic and pressure drop of pulsating flow in corrugated tube[J].Journal of Wuhan Institute of Technology,2013,(02):60-64.[doi:103969/jissn16742869201302013]
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波纹管内层流脉动传热和阻力特性的数值研究(/HTML)
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《武汉工程大学学报》[ISSN:1674-2869/CN:42-1779/TQ]

卷:
期数:
2013年02期
页码:
60-64
栏目:
机电与信息工程
出版日期:
2013-02-28

文章信息/Info

Title:
Numerical analysis on heat transfer characteristic and pressure drop of pulsating flow in corrugated tube
文章编号:
16742869(2013)02006005
作者:
喻九阳1; 聂思皓1 ; 郑小涛1 ; 林纬1; 2
1.武汉工程大学机电工程学院，湖北 武汉 430074；2.武汉理工大学机电工程学院，湖北 武汉 430070
Author(s):
YU Jiuyang1;  NIE Sihao1;  ZHENG Xiaotao1;  LIN Wei1; 2
1. School of Mechanical and Electrical Engineering, Wuhan Institute of Technology, Wuhan 430074, China;2. School of Mechanical and Electrical Engineering, Wuhan University of Technology, Wuhan 430070, China
关键词:
Fluent; 脉动流; 波纹管; 强化传热
Keywords:
fluent;  pulsating flow;  corrugated tube;  heat transfer enhancement
分类号:
TK172.4
DOI:
103969/jissn16742869201302013
文献标志码:
A
摘要:
为探讨波纹管和脉动流同时使用能否实现复合强化传热的效果，利用计算流体力学软件Fluent数值模拟了波纹管在管内流体发生周期性速度变化条件下的传热和阻力特性.模拟的边界条件为：管壁温度293 K；管内工质为水，入口温度333 K，平均流速0.02 m/s，脉动频率f分别取2、4、5、8、10 Hz，振幅A分别取0.2、0.4、0.6、0.8、1；出口压力为0. 通过分析传热强化系数、沿程阻力增强系数、效应评价准则数，结果显示：管内脉动流既能强化波纹管的传热也会弱化传热；相比稳态流条件，传热最大能被强化约5.9%；脉动流会增大波纹管的沿程阻力；综合考虑传热的强化作用和流动阻力的增加，在A≥0.8且f≥4 Hz条件下，管内脉动与波纹管能起到复合强化传热效果；脉动流条件下波节附近漩涡周期性的产生和消失是传热被强化和沿程阻力增加的主要原因.
Abstract:
To explore the possibility of complex enhanced heat transfer, the characteristic of heat transfer and pressure drop of pulsating flow in a corrugated tube was numerically studied by using commercial CFD package Fluent. The temperature of tube wall was fixed at 293K, water was set as the working fluid, inlet temperature was 333 K and mean velocity was 0.02 m/s, the frequency of pulsating fluid was set as 2 Hz, 4 Hz, 5 Hz, 8 Hz, 10 Hz and the magnitude of that was set as 0.2, 0.4, 0.6, 0.8, 1, respectively, the pressure of outlet was set as 0. The enhancement coefficients of heat transfer and pressure drop were analyzed. The results show that heat transfer can either be enhanced or weakened by pulsating flow; compared with steady flow, heat transfer enhancement coefficient increases maximumly 5.9%; pressure drop of corrugated tube is increased by pulsating flow. When A≥0.8 and f≥4 Hz, the effect of pulsating flow on heat transfer is more obvious than that on pressure drop. The periodical formation and disappearance of vortex is the main reason for heat transfer enhancement and pressure drop.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期：20121202基金项目：国家自然科学基金（50976080）作者简介：喻九阳（1962），男，湖北武汉人，教授，硕士.研究方向：高效节能技术.
更新日期/Last Update: 2013-04-16