| 微槽道内气体流动特性的实验研究 |
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| 引用本文： | 李成文,贾力,张田田. 微槽道内气体流动特性的实验研究[J]. 工程热物理学报, 2011, 0(9): 1535-1537 |
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| 作者姓名： | 李成文 贾力 张田田 |
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| 作者单位： | 北京交通大学机械与电子控制工程学院; |
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| 基金项目： | 国家自然科学基金资助(No.50776006;No.50876006) |
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| 摘 要： | 搭建了微槽道的单相实验台，分析了氮气在不同深／宽比、长径比及水力直径的微槽道中流动特性。层流区的摩擦常数与理论预测值吻合较好（除L=20mm工况），层流到湍流的转捩均有不同程度的提前（转捩Re数在1000左右）；在湍流区，槽道的长径比变小、相对粗糙度的增大（或水力直径的减小）及长度的减小可使流动阻力增大；拟合出了湍流区...
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| 关 键 词： | 长径比 深/宽比 相对粗糙度 摩擦常数 |
Experimental Study on Gas Flow Characteristics in Microchannels |
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| LI Cheng-Wen JIA Li ZHANG Tian-Tian. Experimental Study on Gas Flow Characteristics in Microchannels[J]. Journal of Engineering Thermophysics, 2011, 0(9): 1535-1537 |
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| Authors: | LI Cheng-Wen JIA Li ZHANG Tian-Tian |
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| Affiliation: | LI Cheng-Wen JIA Li ZHANG Tian-Tian (School of Mechanical Electronic and Control Engineering,Beijing Jiaotong University,Beijing 100044,China) |
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| Abstract: | The related experimental system is established.Flow characteristics with different depth width ratio,length diameter ratio and diameters are studied in details.It is validated that friction constant fits well with conventional theory predicted.It is found that the friction constant for turbulent flow is obviously larger with length diameter ratio decreases,roughness increases(or diameter decrease),and length decreases.The correlation between friction constant and geometry parameters in turbulent flow region... |
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| Keywords: | length diameter ratio depth width ratio roughness friction constant |
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