涡旋微槽流动与传热特性数值模拟

席有民; 余建祖; 谢永奇; 高红霞

涡旋微槽流动与传热特性数值模拟

北京航空航天大学航空科学与工程学院, 北京 100191

基金项目: 国家自然科学基金资助项目(50676007)

详细信息

作者简介:
席有民(1978-),男,山西临汾人,博士生,xiym@163.com.

通讯作者:
席有民

中图分类号: V434⁺.14
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出版历程
- 收稿日期: 2009-09-03
- 网络出版日期: 2010-11-30

Numerical simulation of flow and heat transfer in swirl microchannels

School of Aeronautic Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China

More Information

Corresponding author: Xi Youmin

摘要

摘要: 涡旋微槽散热器具有传输高热流密度的潜力,在解决航空航天高功率密度器件热控制方面具有广泛应用前景.在实验研究的基础上,采用有限体积法对不同体积流量和槽道结构的涡旋微槽中的流动与传热特性进行了数值模拟研究.对涡旋微槽流动的稳定性进行了分析,给出了摩擦因子和Nu数沿流动方向的变化曲线,并采用场协同原理对涡旋微槽强化传热的机理进行了探讨.计算得到的微槽平均传热系数和摩擦阻力系数与实验数据进行了对比.结果表明:涡旋微槽中二次流的出现是涡旋微槽强化传热的机理所在.
- 涡旋 /
- 微槽 /
- 有限体积法 /
- 传热 /
- 流动
Abstract: Swirl microchannel heat exchanger has the potential to transfer high density thermal flux. It will have great application prospect in solving thermal control problem of aviation and aerospace high power density component. On the basis of experimental research, a numerical simulation of flow and heat transfer in swirl microchannels was conducted. The computation using the finite volume method was performed under different flux for several test sections with different channel structure. The flow stability in the swirl microchannel was analyzed. The variation curves of local friction factor and Nusselt number along flow channel were presented. The enhancing heat transfer in swirl microchannel was discussed with field synergy principle. The calculated mean heat transfer coefficients and flow friction factors were compared with experimental data. The results show that the secondary flow is the mechanics strengthening heat transfer in swirl micrcochannel.
- swirling flow /
- microchannels /
- finite volume method /
- heat transfer /
- flow

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参考文献(1)

[1] Tuckerman D B,Pease R F W.High performance heat sinking for VLSI [J].IEEE Electron Device Letters,1981,2(4):126-129 [2] Palm B.Heat transfer in microchannels[J].Microscale Thermophysical Engineering,2001,5(3):155-175 [3] Obot N T.Toward a better understanding of friction and heat/mass transfer in microchannels:a literature review[J].Microscale Thermophysical Engineering,2002,6(3):155-173 [4] Morini G L.Single-phase convective heat transfer in microchannels:a review of experimental results[J].Int J Therm Sci,2004,43(7):631-651 [5] 席有民,余建祖,谢永奇,等.涡旋微槽内的单相强迫对流换热实验[J].北京航空航天大学学报,2009,35(3):288-291 Xi Youmin,Yu Jianzu,Xie Yongqi,et al.Single-phase forced convective heat transfer in swirl microchannels[J].Journal of Beijing University of Aeronautics and Astronautics,2009,35(3):288-291(in Chinese) [6] 杨卫华,程惠尔.层板发汗冷却推力室板片流道的调节功能试验[J].推进技术,2002,23(4):325-328 Yang Weihua,Cheng Huier.Experiment study for platelet slab flow channel control performance of platelet transpiration cooled thrust chamber[J].Journal of Propulsion Technology,2002,23(4):325-328(in Chinese) [7] 杨卫华,程惠尔,张志军.水在小高宽比微小高度矩形弯管中的流动特性的试验研究[J].水动力学研究与进展A辑,2003,18(3):365-371 Yang Weihua,Cheng Huier,Zhang Zhijun.Experimental investigation of flow characteristics for water in curved microchannel with small aspect ratio[J].Journal of Hydrodynamics A,2003,18(3):365-371(in Chinese) [8] Lee P,Garimella S V.Thermally developing flow and heat transfer in rectangular microchannels of different aspect ratios[J].Int J Heat Mass Trans,2006,49(17/18):3060-3067 [9] 席有民,余建祖,谢永奇,等.矩形微槽乙醇水溶液传热特性数值模拟[J].北京航空航天大学学报,2008,34(6):695-698 Xi Youmin,Yu Jianzu,Xie Yongqi,et al.Numerical simulation of ethanol solution heat transfer in rectangular microchannels[J].Journal of Beijing University of Aeronautics and Astronautics,2008,34(6):695-698(in Chinese) [10] Guo Z Y,Li D Y,Wang B X.A novel concept for convective heat transfer enhancement[J].Int J Heat Mass Transfer,1998,41(14):2221-2225. [11] Guo Z Y,Tao W Q,Shah R K.The field synergy (coordination) principle and its applications in enhancing single phase convective heat transfer[J].Int J Heat Mass Transfer,2005,48(9):1797-1807

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