| 单圆柱微通道内流动特性实验研究 |
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| 引用本文： | 单圆柱微通道内流动特性实验研究.单圆柱微通道内流动特性实验研究[J].山东科学,2010,33(4):53-62. |
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| 作者姓名： | 单圆柱微通道内流动特性实验研究 |
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| 作者单位： | 1. 华北电力大学 能源动力与机械工程学院，河北 保定 071003； 2. 齐鲁工业大学(山东省科学院) 山东省科学院能源研究所，山东 济南 250014; |
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| 基金项目： | 山东省科学院青年基金（2019QN0021）；山东省自然科学基金(ZR2018LE016)；山东省重点研发计划（2019GSF109074）；山东省科学院创新工程专项；山东省科学院科技发展基金（科基合字（2019）第2号） |
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| 摘 要： | 采用Micro-PIV实验系统和压差测试系统，研究了含有单个微圆柱的通道内去离子水在10
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| 关 键 词： | 微圆柱绕流 Micro-PIV 临界雷诺数 漩涡 湍流强度 |
| 收稿时间： | 2019-12-19 |
Experimental study on flow characteristics in a microchannel with a single cylinder |
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| LI Ji-Chao,JI Can,LIU Zhi-gang,LI Hui-jun,MA Chao,CHI Wen-tao.Experimental study on flow characteristics in a microchannel with a single cylinder[J].Shandong Science,2010,33(4):53-62. |
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| Authors: | LI Ji-Chao JI Can LIU Zhi-gang LI Hui-jun MA Chao CHI Wen-tao |
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| Affiliation: | 1. School of Energy, Power and Mechanical Engineering, North China Electric Power University, Baoding 071003, China; 2. Energy Research Institute，Qilu University of Technology（Shandong Academy of Sciences），Jinan 250014, China; |
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| Abstract: | In this paper, a micro-PIV system and differential pressure measurement system is used to study the flow characteristics of deionized water in a channel with a single microcylinder in the range of 10 < Re < 430. The streamlines, dimensionless velocity field, turbulence intensity distribution of different flow layers, and pressure drop are obtained. Results show that the first and second critical Reynolds numbers of the flow around the microcylinder are approximately 10 and 430, respectively. The fluid in the wake vortex has a velocity component that is perpendicular to the flow direction, and the three-dimensional characteristics of the vortex are obvious. When Re is low, the pressure drop and the length of vortices increase slowly with Re and the viscous resistance accounts for a larger proportion. With increase in Re, the vortex gradually develops simultaneously with the increase in the proportion of shape resistance, and the pressure drop increases faster with Re. When Re = 400, the slope of the pressure drop curve rises and then gradually transforms into vortex shedding. |
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| Keywords: | flow around a microcylinder micro-PIV critical Reynolds number vortex turbulence intensity |
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