| 细小圆管内液体流动特性实验研究 |
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| 引用本文： | 鲁进利,王燕,许忠林,王淑娟,郝英立.细小圆管内液体流动特性实验研究[J].工程热物理学报,2009,30(12). |
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| 作者姓名： | 鲁进利 王燕 许忠林 王淑娟 郝英立 |
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| 作者单位： | 东南大学能源与环境学院,江苏,南京,210096 |
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| 基金项目： | 国家自然科学基金，国家重点基础研究发展规划(973计划)，教育部留学回国人员科研启动基金资助项目，东南大学科学基金资助项目 |
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| 摘 要： | 本文实验研究了去离子水在直径为 1.0～2.0 mm 的细小圆管中的流动阻力特性.通过比较相同直径、不同管长的压差,获得了摩擦因子及局部损失系数随 Re 数变化关系.本文实验条件下,对于不同直径的细小圆管,沿程压降及局部压降随流速变化趋势一致;随着管径减小,摩擦因子也减小,且在层流区和湍流区内均要比常规尺度条件下的小;对于不同直径的细小圆管,局部损失系数随 Re 数变化趋势基本一致,当 Re 数相同时,管径越小,对应的局部损失系数越大;对于直径为 1.0～2.0 mm 的细小圆管,临界雷诺数 Rec=2050～2300.
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| 关 键 词： | 流动特性 摩擦因子 局部损失 |
EXPERIMENTAL INVESTIGATION OF FLOW CHARACTERISTICS OF LIQUID IN MINI-TUBES |
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| LU Jin-Li,WANG Yan,XU Zhong-Lin,WANG Shu-Juan,HAO Ying-Li.EXPERIMENTAL INVESTIGATION OF FLOW CHARACTERISTICS OF LIQUID IN MINI-TUBES[J].Journal of Engineering Thermophysics,2009,30(12). |
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| Authors: | LU Jin-Li WANG Yan XU Zhong-Lin WANG Shu-Juan HAO Ying-Li |
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| Institution: | LU Jin-Li WANG Yan XU Zhong-Lin WANG Shu-Juan HAO Ying-Li (School of Energy and Environment,Southeast University,Nanjing 210096,China) |
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| Abstract: | The resistance characteristics of deionized water in minitubes with three different diameters ranging from 1.0 mm to 2.0 mm are experimentally investigated.The relation of friction factor and minor loss coefficient with Reynolds number are obtained.The results show that the variations of pressure drop and local pressure drop with mean velocity of fluid in minitubes are consistent basically. The friction factor decreases with the decrease of diameter.And the values are smaller than that in convectional scale... |
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| Keywords: | flow characteristics friction factor minor loss |
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