潜热型功能热流体在扁管内的对流换热实验

doi:CNKI:11-1929/V.20110815.1716.001

材料工程与机械制造

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潜热型功能热流体在扁管内的对流换热实验

王亮, 林贵平, 王涛, 王慧丹

北京航空航天大学航空科学与工程学院, 北京 100191

收稿日期:2010-12-02 修回日期:2011-01-27 出版日期:2011-11-25 发布日期:2011-11-24
通讯作者: 王亮 E-mail:wl@ase.buaa.edu.cn
作者简介:王亮(1980－ ) 男,博士,博士后。主要研究方向:功能型热流体强化传热,综合热能管理。 Tel: 010-82338600 E-mail: wl@ase.buaa.edu.cn 林贵平(1966－ ) 男,博士,教授,博士生导师。主要研究方向:强化传热,飞机防冰,环境模拟与仿真技术。 Tel: 010-82317533 E-mail: gplin@buaa.edu.cn
基金资助:
国家自然科学基金 (50436020);中国博士后科学基金(20100470187)

Convective Heat Transfer Characteristic of Latent Functionally Thermal Fluid in a Flat Tube

WANG Liang, LIN Guiping, WANG Tao, WANG Huidan

School of Aeronautic Science and Engineering, Beihang University, Beijing 100191, China

Received:2010-12-02 Revised:2011-01-27 Online:2011-11-25 Published:2011-11-24

摘要/Abstract

摘要： 通过质量分数为5%~20%的潜热型功能热流体在扁管内的对流换热特性实验,研究了相变材料微胶囊质量分数、质量流量等因素对流体换热性能的影响。实验发现,流量较小的情况下,功能流体传热性能优于水且随着质量分数的升高而增强,而当流量较大的情况下,接近入口处的功能流体的传热性能则弱于水。以改进的Nusselt数评价,入口段内,质量分数为10%和20%的潜热型功能热流体的平均换热能力比水分别提高了6.7%和16.2%。实验质量分数范围内的潜热型功能热流体均表现出牛顿流体的特性,且其黏度较符合Vand关系式。

关键词: 潜热型功能热流体, 相变材料, 微胶囊, 对流换热, 扁管

Abstract: An experimental investigation on the convective heat transfer characteristic of 5wt%-20wt% latent functionally thermal fluid flowing in a flat tube is presented in this work. The influences of the mass flow rate and the mass fraction of microencapsulated phase change material (MPCM) on the heat transfer performance are conducted. The results of the experiment show that at the region of small flow rate, the heat transfer performance of latent functionally thermal fluid is better than that of water and increases with the increase of concentration of MPCM, while not as good as that of water near the entrance where the flow rate is high. Evaluated by the modified Nusselt number, the average heat transfer rate of 10wt% and 20wt% suspensions is improved by 6.7% and 16.2% respectively compared to that of water at the entrance region. The latent functionally thermal fluids are approximately Newtonian fluids and their viscosities fit well with the Vand model.

Key words: latent functionally thermal fluid, phase change materials, microcapsule, convective heat transfer, flat tube

中图分类号:

TK124

王亮, 林贵平, 王涛, 王慧丹. 潜热型功能热流体在扁管内的对流换热实验[J]. 航空学报, 2011, 32(11): 2124-2130.

WANG Liang, LIN Guiping, WANG Tao, WANG Huidan. Convective Heat Transfer Characteristic of Latent Functionally Thermal Fluid in a Flat Tube[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2011, 32(11): 2124-2130.

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E-mail：hkxb@buaa.edu.cn

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主管单位：中国科学技术协会主办单位：中国航空学会北京航空航天大学

潜热型功能热流体在扁管内的对流换热实验

Convective Heat Transfer Characteristic of Latent Functionally Thermal Fluid in a Flat Tube

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