摘要
本文采用内径为84．7μm及144．4μm的玻璃圆管作为实验管，对微细管内气体流动的阻力特性进行了实验研究．结果表明，层流状态下，微细圆管内气体流动的摩擦系数大于不可压、充分发展管内流动的数值．其物理机制为：微细圆管内气体流动的可压缩性导致速度抛面偏高抛物线分布，使得壁面处的速度梯度增加，摩擦阻力增大．
Experimental results concerning the friction resistance coefficient for gas flow in mi-crotubes are presented in this paper. The inner diameters of the test tubes are 84.7μm and 144.4μm. It can be concluded that it is the compressibility of gas which leads to the higher friction resistance coefficients than classical value for incompressible, fully-developed,laminar flow in macro tubes.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
1998年第4期459-463,共5页
Journal of Engineering Thermophysics
基金
微米/纳米国防预研微机理研究专项青年基金
