全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...
化工学报  2015 

加热功率对三角形微肋阵内流动与对流换热特性的影响

DOI: 10.11949/j.issn.0438-1157.20141915, PP. 2062-2069

Keywords: 微肋群,加热功率,Reynolds数,摩擦阻力系数,Nusselt数,流动,对流,实验验证

Full-Text   Cite this paper   Add to My Lib

Abstract:

建立了三角形微肋阵对流换热性能测试系统,以去离子水为工质对三角形微肋阵(d=247μm,H=500μm)的流动及对流换热特性进行了实验研究,测试并得到了去离子水流经三角形微肋阵时压力降、阻力系数f及Nusselt数(Nu)等参数在不同Reynolds数(Re)及加热功率P下的变化规律,分析了加热功率对于三角形微肋阵流动阻力及对流换热特性的影响机理。实验结果表明,Re为0~250范围内,随加热功率增加三角形微肋阵阻力系数明显增大,增加幅度最高可达200%以上;当Re>250时,不同加热功率对阻力系数的影响显著减弱;而当Re>600时,阻力系数几乎不再随加热功率增加而发生变化。当Re250时,受三角形背风区旋涡演变的影响,Nu随加热功率增加而逐渐减小。

References

[1]  Liu Z G, Zhang C W, Guan N. Experimental investigation on resistance characteristics in micro/mini cylinder group [J]. Experimental Thermal and Fluid Science, 2011, 35: 226-233.
[2]  Mei Deqing, Lou Xinyang, Qian Miao, Yao Zhehe, Liang Lingwei, Chen Zichen. Effect of tip clearance on the heat transfer and pressure drop performance in the micro-reactor with micro-pin-fin arrays at low Reynolds number [J]. International Journal of Heat and Mass Transfer, 2014, 70: 709-718.
[3]  Qu Wei-lin, Siu-Ho A. Liquid single-phase flow in an array of micro-pin-fins (Part Ⅰ): Heat transfer characteristics [J]. Journal of Heat Transfer, 2008, 130 (12): 122402-1-11.
[4]  Qu Wei-lin, Siu-Ho A. Liquid single-phase flow in an array of micro-pin-fins (Part Ⅱ): Pressure drop characteristics [J]. Journal of Heat Transfer, 2008, 130 (12): 124501-1-4.
[5]  Tullius J F, Tullius T K, Bayazitoglu Y. Optimization of short micro pin fins in minichannels [J]. International Journal of Heat and Mass Transfer, 2012, 55: 3921-3932.
[6]  Liu Z G, Guan N, Zhang C W. Influence of tip clearance on heat transfer efficiency in micro-cylinders-group heat sink [J]. Experimental Thermal and Fluid Science, 2013, 46: 64-73.
[7]  Liu Zhigang (刘志刚), Zhang Chengwu (张承武), Guan Ning (管宁), Influence of tip clearance on heat transfer efficiency in staggered micro-cylinders-group [J]. CIESC Journal (化工学报), 2012, 63 (4): 1025-1031.
[8]  Guan Ning (管宁), Liu Zhigang (刘志刚), Zhang Chengwu (张承武). Laminar flow characteristics in in-line arranged micro-cylinder groups [J]. CIESC Journal (化工学报), 2011, 62 (3): 664-671.
[9]  Xia Guodong (夏国栋), Cui Zhenzhen (崔珍珍), Zhai Yuling (翟玉玲). Flow and heat transfer characteristics of micro-rhomboid pin fins [J]. Journal of China University of Petroleum (中国石油大学学报), 2014, 38 (2): 130-134.
[10]  Liu Dong (刘东), Jiang Bin (蒋斌), Chen Fei (陈飞). Heat transfer characteristics of cooling system with square pin fins [J]. High Power Laser and Particle Beams (强激光与离子束), 2013, 25 (2): 335-340.
[11]  Zhang Chengwu (张承武), Jiang Guilin (姜桂林), Guan Ning (管宁). Resistance characteristics of micro pin fins with different cross-section shapes [J]. CIESC Journal (化工学报), 2014, 65 (6): 2042-2048.
[12]  John T J, Mathew B, Hegab H. Parametric study on the combined thermal and hydraulic performance of single phase micro pin-fin heat sinks (Part Ⅰ): Square and circle geometries [J]. International Journal of Thermal Sciences, 2010, 49: 2177-2190.
[13]  Moffat R J. Describing the uncertainties in experimental results [J]. Experimental Thermal and Fluid Science, 1988, 1: 3-17.
[14]  Yoav Peles. Forced convective heat transfer across a pin fin micro heat sink [J]. International Journal of Heat and Mass Transfer, 2005, 48: 3615-3627.
[15]  Kong Long (孔珑). Engineering Fluid Mechanics (工程流体力学) [M]. Beijing: Hydraulic and Electric Power Press, 1995: 278-279.
[16]  Wang Wei (王玮), Li Zhixin (李志信), Guo Zengyuan (过增元). Numerical simulation of rough surface effects on microscale fluid flow [J]. Journal of Engineering Thermophysics (工程热物理学报), 2003, 24 (1): 85-87.
[17]  Haleh Shafeie, Omid Abouali, Khosrow Jafarpur, Goodarz Ahmadi. Numerical study of heat transfer performance of single-phase heat sinks with micro pin-fin structures [J]. Applied Thermal Engineering, 2013, 58: 68-76.
[18]  Carlos A Rubio-Jimenez, Satish G Andlikar, Abel Hernandez-Guerrero. Performance of online and offset micro pin-fin heat sinks with variable fin density [J]. IEEE Transactions on Components, Packaging and Manufacturing Technology, 2013, 3 (1): 86-93.
[19]  Reeser A, Bar-Cohen A, Hetsroni G. High quality flow boiling heat transfer and pressure drop in microgap pin fin arrays [J]. International Journal of Heat and Mass Transfer, 2014, 78: 974-985.
[20]  Liu M, Liu D, Xu S, Chen Y. Experimental study on liquid flow and heat transfer in micro square pin fin heat sink [J]. International Journal of Heat and Mass Transfer, 2011, 54: 5602-5611.
[21]  Shenoy S, Tullius J F, Bayazitoglu Y. Minichannels with carbon nanotube structured surfaces for cooling applications [J]. International Journal of Heat and Mass Transfer, 2011, 54: 5379–5385.
[22]  Adewumi O O, Bello-Ochende T, Meyer J P. Constructal design of combined microchannel and micro pin fins for electronic cooling [J]. International Journal of Heat and Mass Transfer, 2013, 66: 315-323.
[23]  Sidy Ndao, Hee Joon Lee, Yoav Peles, Michael K Jensen. Heat transfer enhancement from micro pin fins subjected to an impinging jet [J]. International Journal of Heat and Mass Transfer, 2012, 55: 413-421.

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133