微石英管与多孔光纤内流动特性实验研究  

Experimental Study on Gas Flow in Quartz Microtubes and Holey Optical Fibers

作　　者：黄迦乐[1] 金滔[1] 汤珂[1] 

机构地区：[1]浙江大学制冷与低温研究所,浙江杭州310027

出　　处：《工程热物理学报》2013年第7期1213-1216,共4页Journal of Engineering Thermophysics

基　　金：国家自然科学基金(No.51076137);教育部博士点基金(No.20100101110034)

摘　　要：搭建了微通道流动特性实验台,对直径为20μm和50μm的微石英管以及一种多孔光纤内的气体流动特性进行了研究。重点考察了不同流量下微通道进出口两端的压力降,进而计算获得在不同雷诺数下对应的流动摩擦因数以及泊肃叶数,并将实验与基于N-S方程的数值模拟结果进行对比分析。在实验研究的流量范围内,微通道内流动的克努森数部分进入滑移区,而毛细玻璃管和多孔光纤的摩擦因数呈现出比常规尺寸通道增大的现象。An experimental setup was built to investigate the gas flow characteristics in quartz microtubes with diameters of 20μm and 50μm,and in a type of holey optical fiber.The pressure drops between the inlet and outlet were measured with various mass flow rates.The Darcy friction factor and the Poiseuille number dependencies of the Reynolds number were calculated and then compared with numerical simulation results based on Navier-Stokes equations.It was shown from the Knudsen number that the flow partially enters slip regime in the mass flow rate range discussed.The flow resistances in quartz microtubes and holey optical fibers are larger than those in conventional scale channels.

关 键 词：微通道流动 多孔光纤 微石英管 流阻 摩擦因素 

分 类 号：TB511[理学—物理]