不锈钢微细圆管中去离子水流动特性

doi:10.3969/j.issn.0438-1157.2012.10.016

化工学报 ›› 2012, Vol. 63 ›› Issue (10): 3119-3124.DOI: 10.3969/j.issn.0438-1157.2012.10.016

不锈钢微细圆管中去离子水流动特性

鲁进利¹, 韩亚芳¹, 陈永平², 郝英立²

1. 安徽工业大学建筑工程学院, 安徽马鞍山 243032;
2. 东南大学能源与环境学院, 江苏南京 210096

收稿日期:2012-02-14 修回日期:2012-04-10 出版日期:2012-10-05 发布日期:2012-10-05
通讯作者: 鲁进利
作者简介:鲁进利(1982- ),男,博士。
基金资助:
国家自然科学基金项目(50676020);安徽工业大学优秀创新团队项目。

Flow characteristics of deionized water in stainless steel microtubes

LU Jinli¹, HAN Yafang¹, CHEN Yongping², HAO Yingli²

1. School of Civil Engineering and Architecture, Anhui University of Technology, Maanshan 243002, Anhui, China;
2. School of Energy and Environment, Southeast University, Nanjing 210096, Jiangsu, China

Received:2012-02-14 Revised:2012-04-10 Online:2012-10-05 Published:2012-10-05
Supported by:
supported by the National Natural Science Foundation of China(50676020)and the Program of Excellent Innovation Team of Anhui University of Technology.

摘要/Abstract

摘要： 实验研究了去离子水流过不锈钢微圆管时的阻力特性,微圆管直径为543.3、654.4、737.2 μm,对应的壁面相对粗糙度分别为0.31%、0.16%、0.1%。实验中,采用长短管比较法消除实验段进、出口的局部阻力影响,通过测量得到了不同管径的压力梯度随Re的变化关系,及摩擦阻力系数f和Poiseuille数随Re的变化关系。结果表明,压力梯度随管径减小快速增加;管径较小时(d=543.3 μm)壁面相对粗糙度ε=0.31%时影响管内流动,使得摩擦阻力系数及Poiseuille数增加,转捩点提前(Re_c≈1500),当管径大于650 μm时,较小的壁面相对粗糙度不影响管内层流流动。

关键词: 微圆管, 去离子水, 粗糙度, 摩擦阻力系数

Abstract: The flow characteristics of deionized water in stainless steel microtubes were experimentally investigated in this study.The influences of relative surface roughness and inner diameter of tube on pressure drop were discussed.The inner diameters of microtubes were 543.3,654.4 and 737.2 μm,with the relative surface roughness 0.31%,0.16% and 0.1%,respectively.In experiments,long tube and short tube were used and compared to eliminate the effect of inlet and outlet.The relationships between pressure drop and Re with different diameters,between friction factor f and Re,and between Poiseuille number and Re were obtained.The results show that the variation of tube diameter affects the pressure gradient.With the decrease of tube diameter,the pressure gradient increases quickly.Large relative surface roughness(ε=0.31%,d=543.3 μm)results in higher friction factor and earlier transition point(Re_c≈1500),while smaller relative surface roughness(ε=0.16%,d=650 μm)has little effect on the laminar flow characteristics.

Key words: microtube, deionized water, roughness, friction factor

中图分类号:

TK124

鲁进利, 韩亚芳, 陈永平, 郝英立. 不锈钢微细圆管中去离子水流动特性[J]. 化工学报, 2012, 63(10): 3119-3124.

LU Jinli, HAN Yafang, CHEN Yongping, HAO Yingli. Flow characteristics of deionized water in stainless steel microtubes[J]. CIESC Journal, 2012, 63(10): 3119-3124.

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不锈钢微细圆管中去离子水流动特性

Flow characteristics of deionized water in stainless steel microtubes

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