平行多微通道入口突缩压降系数的实验研究

工程热物理学报 , 2010, 31(7): 1219-1222.

平行多微通道入口突缩压降系数的实验研究

宋天一 ^1, , ^2, , ^3, , ^4, , 马学虎 ^5,

1.大连理工大学化工学院,化学工程研究所,辽宁,大连,116012;Department of Engineering,Queen Mary,University of London,London E1 4NS,UK

2.Department of Engineering,Queen Mary,University of London,London E1 4NS,UK

3.Department of Engineering,Queen Mary,University of London,London E1 4NS,UK

4.Department of Engineering,Queen Mary,University of London,London E1 4NS,UK

5.大连理工大学化工学院,化学工程研究所,辽宁,大连,116012

基金项目: 国家自然科学基金(50776012) 教育部新世纪优秀人才基金(NCET-05-0280)

关键词：平行多微通道 , 突缩压降 , 单相气体流动 , 压力损失系数

PRESSURE DROP COEFFICIENT FOR ABRUPT CONTRACTION OF PARALLEL MULTI-MICROCHANNELS

本文实验研究了平行多微通道入口处的特殊突缩结构所引起的单相气体流动压力损失.通过测定压缩空气流经通道入口前后的温度、压力和流量,得到了压力损失系数与单个微通道内流体Re数(3100～19000范围内)之间的关系式,与相关文献结果对比发现,现有的基于常规尺寸和微细尺寸的单通道突缩压降系数经验关联式不能正确预测平行多微通道入口突缩压力损失系数随Re数的变化.另外该关联式还能较好地预测饱和水蒸气的单相流动突缩压降系数.

参考文献

[1]	J. Schmidt;L. Friedel .Two-phase pressure drop across sudden contractions in duct areas[J].International Journal of Multiphase Flow,1997(2):283-299.
[2]	Abdelall FF;Hahn G;Ghiaasiaan SM;Abdel-Khalik SI;Jeter SS;Yoda M;Sadowski DL .Pressure drop caused by abrupt flow area changes in small channels[J].Experimental Thermal and Fluid Science: International Journal of Experimental Heat Transfer, Thermodynamics, and Fluid Mechanics,2005(4):425-434.
[3]	Chalfi TY;Ghiaasiaan SM .Pressure drop caused by flow area changes in capillaries under low flow conditions[J].International Journal of Multiphase Flow,2008(1):2-12.
[4]	LI Zhuo,YU Jian,MA ChongFang.Characteristics of pressure drop for single-phase and two-phase flow across sudden contraction in microtubes[J].中国科学E辑（英文版）,2008(02):162-169.
[5]	Wang WWW.;Radcliff TD.;Christensen RN. .A condensation heat transfer correlation for millimeter-scale tubing with flow regime transition[J].Experimental Thermal and Fluid Science: International Journal of Experimental Heat Transfer, Thermodynamics, and Fluid Mechanics,2002(5):473-485.
[6]	Shigeru Koyama;Ken Kuwahara;Kouichi Nakashita;Ken Yamamoto .An experimental study on condensation of refrigerant R134a in a multi-port extruded tube[J].International Journal of Refrigeration,2003(4):425-432.
[7]	Nae-Hyun Kim;Jin-Pyo Cho;Jung-Oh Kim;Baek Youn .Condensation heat transfer of R-22 and R-410A in flat aluminum multi-channel tubes with or without micro-fins[J].International Journal of Refrigeration,2003(7):830-839.
[8]	Cavallini A;Del Col D;Doretti L;Matkovic M;Rossetto L;Zilio C .Two-phase frictional pressure gradient of R236ea, R134a and R410A inside multi-port mini-channels[J].Experimental Thermal and Fluid Science: International Journal of Experimental Heat Transfer, Thermodynamics, and Fluid Mechanics,2005(7):861-870.

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