微小圆管内流动研究  

The study on the flow of the kerosene in micro tube

作　　者：李中洲[1] 朱惠人[1] 

机构地区：[1]西北工业大学动力与能源学院,西安710072

出　　处：《机械设计与制造》2010年第12期130-132,共3页Machinery Design & Manufacture

基　　金：国家973计划(2007CB707701)

摘　　要：通过实验对内径为1mm的微小圆管中RP-3航空煤油的流动压降和摩擦阻力系数(损失系数)进行了研究。结果表明:在层流区摩擦阻力系数随雷诺数的增加而减小,而且微小圆管内的摩擦阻力系数比常规大圆管中摩擦阻力系数小;在内径为1mm的微小圆管中,流动从层流转变成紊流的临界雷诺数为949,远小于常规圆管中的临界雷诺数。管内流动压降随雷诺数的增大而增大。Experiments have been done to investigate the flow pressure drop and the friction coefficient of the kerosene(RP-3) in micro tube.The diameter of the micro tube is 1mm.The result shows that the friction coefficient decreases with the increasing of the Reynolds number in laminar,the friction coefficient in micro tube is smaller than in traditional channels;in the micro tube with the inner diameter of 1mm,the transition from laminar to turbulent happens at the Reynolds number of 949,which was much lower than the critical Reynolds number for conventional ducts.The flow pressure drop increases with the increasing of the Reynolds number.

关 键 词：圆管内流动 FLOW 摩擦阻力系数 微小圆管 临界雷诺数 流动压降 损失系数 内径 航空煤油 层流区 紊流 实验 结果 

分 类 号：TH122[机械工程—机械设计及理论] TH16