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Volume 41 Issue 7
Jul.  2015
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Journal of Beijing University of Aeronautics and Astronautics  > 2015  >  41(7): 1253-1258.
LIU Yangpeng, XU Guoqiang, LI Haiwang, et al. Experiment of air flow behavior and heat transfer characteristics in microchannels with different aspect ratios[J]. Journal of Beijing University of Aeronautics and Astronautics, 2015, 41(7): 1253-1258. doi: 10.13700/j.bh.1001-5965.2014.0524(in Chinese)
Citation: LIU Yangpeng, XU Guoqiang, LI Haiwang, et al. Experiment of air flow behavior and heat transfer characteristics in microchannels with different aspect ratios[J]. Journal of Beijing University of Aeronautics and Astronautics, 2015, 41(7): 1253-1258. doi: 10.13700/j.bh.1001-5965.2014.0524(in Chinese)
shu

Experiment of air flow behavior and heat transfer characteristics in microchannels with different aspect ratios

doi: 10.13700/j.bh.1001-5965.2014.0524

  • National Key Laboratory of Science and Technology on Aero-Engines, Beijing University of Aeronautics and Astronautics, Beijing 100191, China

  • Received Date: 25 Aug 2014
  • Rev Recd Date: 27 Oct 2014
  • Publish Date: 20 Jul 2015
    Abstract
  • Experiments were conducted to investigate the flow behavior and heat transfer characteristics in minichannels with different aspect ratios. The widths of microchannels are constant of 0.4mm. The aspect ratiosof the microchannels are 2/5, 1/2, 2/3 and 1, respectively. All tests were performed with air. The experiments were completed with the Reynolds number in the range of 200 to 1600. Results of experiments show that the aspect ratios of microchannels have a remarkable effect on the performance of flow behavior and heat transfer characteristics. The friction factors decrease with the increase of the Reynolds numbers. The Poiseuille numbers increase when the Reynolds numbers keep rising. Both of the friction factors and Poiseuille numbers drop as the aspect ratios increase. Nusselt numbers increase as Reynolds numbers increase, but decrease with the increase of aspect ratios. The corresponding empiric equations for the flow resistance and heat transfer characteristics in microchannels with different aspect ratios are fitted.

     

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    • References(20)
  • [1]
    Goh Y S. Heat transfer and flow characteristics inside a gas turbine combustor[D].Baton Rouge: Louisiana State University, 2003.
    [2]
    顾维藻, 刘文艳. 高温涡轮叶片三种内冷通道冷却性能的实验研究[J].工程热物理学报, 1998, 19(2): 198-203. Gu W Z, Liu W Y.Experimental investigation on the cooling performance of three gas turbine blade internal passages[J].Journal of Engineering Thermophysics, 1998, 19(2): 198-203(in Chinese).
    [3]
    Brenchiey D L, Wegeng R S, Drost M K.Development of micro chemical and thermal systems[J].Proceeding of Combustion Institute, 2002, 29(1): 909-916.
    [4]
    吕春红, 任泰安.微尺度流动研究的历史与现状[J].重庆电力高等专科学校学报, 2007, 12(1): 11-13. Lv C H, Ren T A.The history and actuality of mircro-scale research[J].Journal of Chongqing Electric Power College, 2007, 12(1): 11-13(in Chinese).
    [5]
    孙纪宁, 邓晶, 邓宏武.涡轮叶片微小通道气膜新型复合冷却机构设计[J].北京航空航天大学学报, 2012, 38(5): 702-706.Sun J N, Deng J, Deng H W.Structure design of a new cooling system combined micro channel and film cooling in the turbine blade[J].Journal of Beijing University of Aeronautics and Astronautics, 2012, 38(5): 702-706(in Chinese).
    [6]
    Wu P Y, Little W A.Measurement of friction factors for the flow of gases in very fine channels used for microminiature Joule-Thompson refrigerators[J].Cryogenics, 1983, 23(5): 273-277.
    [7]
    Wu P Y, Little W A.Measurement of heat transfer characteristics of gas flow in fine channel heat exchangeers used for microminiature refrigerators[J].Cryogenics, 1984, 24(8): 415-420.
    [8]
    Pfahel J, Harlay J, Bau H.Gas and liquid flow in small channels[C]//Symposium on Michromechanical Sensors Actuators, and Systems.New York: ASME, 1991: 49-60.
    [9]
    Choi S B, Barron R, Warrington R.Fluid flow and heat transfer in microtubes[C]//Micro-mechanical Sensors, Actuators, and Systems.New York: ASME, 1991: 123-134.
    [10]
    Park J S, Han J C, Huang Y, Ou S.Heat transfer performance comparison of five different rectangular channels with parallel angled ribs[J].International Journal of Heat and Mass Transfer, 1992, 35(11): 2891-2903.
    [11]
    Paisarn N, Osod K.Study on the convective heat transfer and pressure drop in the micro-channel heat sink[J].International Communications in Heat and Mass Transfer, 2009, 36(1): 39-44.
    [12]
    Kenning D B R, Lewis J S, Karayiannis T G, et al.Pressure drop and heat transfer characteristics for single-phase developing flow of water in rectangular microchannels[J].Journal of Physics: Conference Series, 2012, 395(1): 12085-12097.
    [13]
    Zhang J, Diao Y H, Zhao Y H, et al.An experimental study of the characteristics of fluid flow and heat transfer in the multiport microchannel flat tube[J].Applied Thermal Engineering, 2014, 65(1): 209-218.
    [14]
    Sepideh K, Navid B, John R T.Sudden expansions in circular microchannels: Flow dynamics and pressure drop[J].Microfluid Nanofluid, 2013, 17(3): 561-572.
    [15]
    Hung Y M, Lim C S, Ting T W, et al.Streamwise conduction of nanofluid flow in microchannels[C]//World Academy of Science, Engineering and Technology.Perth: [s.n.], 2012, 6: 161-166.
    [16]
    Lin T Y, Chen C W, Yang C Y, et al.An experimental investigation on friction characteristics and heat transfer of air and CO2 flow in microtubes with structured surface toughness[J].Heat Transfer Engineering, 2014, 35(2): 150-158.
    [17]
    Chen C, Teng J T, Cheng C H, et al.A study on fluid flow and heat transfer in rectangular microchannels with various longitudinal vortex generators[J].International Journal of Heat and Mass Transfer, 2014, 69: 203-214.
    [18]
    Guo Z Y, Li Z X.Size effect on microscale single-phase flow and heat transfer[J].International Journal of Heat and Mass Transfer, 2003, 46(1): 149-159.
    [19]
    Kline S J, McClintock F.Describing uncertainties in single-sample experiments[J].Mechanical Engineering, 1953, 75(1): 3-8.
    [20]
    Rohsenow W M, Hartnett J P.Handbook of heat transfer[M].New York: McGraw-Hill Professional, 1998: 294-298.
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