[1]杨迎春,陈永平,施明恒,等.恒壁温下梯形硅微通道热沉流动换热特性[J].东南大学学报(自然科学版),2008,38(4):647-650.[doi:10.3969/j.issn.1001-0505.2008.04.020]
 Yang Yingchun,Chen Yongping,Shi Mingheng,et al.Heat transfer in trapezoidal silicon microchannel heat sinks with constant wall temperature[J].Journal of Southeast University (Natural Science Edition),2008,38(4):647-650.[doi:10.3969/j.issn.1001-0505.2008.04.020]
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恒壁温下梯形硅微通道热沉流动换热特性()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
38
期数:
2008年第4期
页码:
647-650
栏目:
能源与动力工程
出版日期:
2008-07-20

文章信息/Info

Title:
Heat transfer in trapezoidal silicon microchannel heat sinks with constant wall temperature
作者:
杨迎春 陈永平 施明恒 肖春梅 吴嘉峰 张程宾
东南大学能源与环境学院, 南京 210096
Author(s):
Yang Yingchun Chen Yongping Shi Mingheng Xiao Chunmei Wu Jiafeng Zhang Chengbin
School of Energy and Environment, Southeast University, Nanjing 210096, China
关键词:
梯形微通道 传热 阻力损失 数值模拟
Keywords:
trapezoidal microchannel heat transfer pressure drop numerical simulation
分类号:
TK124
DOI:
10.3969/j.issn.1001-0505.2008.04.020
摘要:
建立了恒壁温条件下微通道中层流流动换热的三维模型,对水力直径分别为108,160和200 μm的梯形硅微通道内单相流动换热特性进行了数值模拟研究.研究结果表明:在恒壁温条件下,通道入口段Nu数最大,并沿流程逐渐减小,直至达到充分发展时,Nu数趋于定值; 与大管道经典理论不同,充分发展段Nu数随Re数的增加而增加; 通道尺度的减小能有效强化换热; 恒壁温条件下的平均Nu数总是低于恒热流条件下平均Nu数.同时,对流动阻力损失的研究发现,Poiseuille数与经典值基本吻合.
Abstract:
A three-dimensional model with constant wall temperature condition has been developed to simulate the laminar convective heat transfer in trapezoidal silicon microchannels, which have hydraulic diameter of 108, 160 and 200 μm respectively. The simulation results indicate that the Nu number has a much higher value near the channel inlet and decreases along the flow direction, approaching a constant value at the fully developed region. Different from the conventional theory, the Nu number at the fully developed region in microchannels increases with the increase of Re number. The heat transfer will be enhanced by the decrease of the channel diameter. The average Nu number at constant wall temperature is always lower than that at constant heat flux condition. Pressure drop is also analyzed. It is indicated that Poiseuille number is almost the same as the classical value.

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备注/Memo

备注/Memo:
作者简介: 杨迎春(1982—),女,硕士生; 陈永平(联系人),男,博士,教授,博士生导师,ypchen@seu.edu.cn.
基金项目: 霍英东青年教师基金资助项目(101055)、教育部新世纪优秀人才计划资助项目、高等学校博士学科点专项科研基金资助项目.
引文格式: 杨迎春,陈永平,施明恒,等.恒壁温下梯形硅微通道热沉流动换热特性[J].东南大学学报:自然科学版,2008,38(4):647-650.
更新日期/Last Update: 2008-07-20