柔性管流体输送紊流减阻的力学特征  

Dynamic Characteristics on Friction Drag Reduction for Fluid Transport Using Flexible Tubes

作　　者：蔡书鹏[1] 唐川林[1] 张凤华[1] 杨林[2] 

机构地区：[1]湖南工业大学水射流研究所,湖南株洲412008 [2]重庆交通大学机电与汽车工程学院,重庆400074

出　　处：《四川大学学报（工程科学版）》2009年第2期24-28,共5页Journal of Sichuan University (Engineering Science Edition)

基　　金：国家自然科学基金资助项目(50504021);湖南省教育厅资助科研资助项目(06C265)

摘　　要：为阐明柔性管与紊流耦合的减阻力学特性,采用双重管结构对柔性管的减阻效果、使用压力传感器和应变仪对柔性管的管外壁位移脉动特性和壁压脉动特性进行了实验研究。结果表明:壁厚越小以及雷诺数越大,柔性管的减阻率越大,雷诺数约为18000时,厚为2 mm、3 mm及4 mm柔性管的减阻率分别12%、10%、9%;柔性管的壁压脉动强度大幅度受到抑制;柔性管外壁的位移脉动与壁压脉动基本同步。柔性管壁压脉动的大幅受抑可认为是柔性管减阻的主要原因。In order to clarify the mechanical characteristics on friction reduction by coupling flexible tubes with turbulent flow,experimental investigation was performed on effects of turbulent drag reduction by using sleeve-structured flexible tubes.The speciality of pressure fluctuating on inner wall surface of the flexible tubes and the speciality of the displacement fluctuating on the external wall surface are studied,by using the strain gauge and pressure sensor.The results are as following.The thinner the flex...

关 键 词：柔性管 紊流减阻 壁压脉动 位移脉动 

分 类 号：TV131.3[水利工程—水力学及河流动力学]