微小通道内空气流动特性实验研究  

Experimental Study of Air Flow Characteristics in Micro-Channels

作　　者：郑光华[1] 张凯[1] 魏文强[1] 贺宜红[2] 

机构地区：[1]西北工业大学动力与能源学院,西安710072 [2]中国航空动力机械研究所,湖南株洲412002

出　　处：《应用数学和力学》2014年第3期272-277,共6页Applied Mathematics and Mechanics

摘　　要：研究了空气在不同压比条件下,在内径分别为0.4 mm和0.5 mm的微圆直管内的流动特性.研究表明空气流过微圆管的阻力系数是常规管道的4至5倍,且存在层流状态提前过渡到湍流状态的提前转捩现象.微圆管管径越小,管内流动压力损失越大.The flow characteristics in micro-channels with inner diameters of 0.4 mm and 0.5 mm at different pressure ratios were experimentally studied. The resistance coefficients in the micro-channels are 4 to 5 times of those of the conventional channels, and the phenomenon of early transition from laminar flow to turbulence in advance is well explained. The smaller the di- ameter of a micro-channel is, the greater the flowing pressure loss results.

关 键 词：微通道 阻力系数 流动特性 提前转捩 

分 类 号：O354.1[理学—流体力学]