小槽道表面活性剂湍流减阻及流变特性的实验研究  

Experimental Studies on Rheologic and Turbulent Drag-reducing Properties of Surfactant in Small-size Channel

作　　者：庞明军[1] 徐磊[1] 张展[1] 彭泽江 

机构地区：[1]常州大学机械工程学院,江苏常州213164

出　　处：《节能技术》2017年第3期195-198,282,共5页Energy Conservation Technology

基　　金：国家自然科学基金项目资助(51376026);江苏省"青蓝工程"资助

摘　　要：深入理解表面活性剂减阻机理对于流体管道输送的减阻节能具有重要意义。为了理解表面活性剂湍流减阻特性和减阻机理,本文基于断面尺寸为10 mm×150 mm的二维有机玻璃槽道,对CTAC/Nasal表面活性剂湍流减阻开展了实验测试,并利用MCR302流变仪测试了减阻溶液的流变特性。研究表明,最高减阻率、临界减阻雷诺数、减阻雷诺数范围与减阻溶液的浓度密切相关,但它们之间并非线性关系;剪切作用对表面活性剂胶束剪切诱导结构(即网状胶束结构)的形成和破坏能够很好的诠释表面活性剂减阻机理。It is important for reducing drag and saving energy of fluid pipeline transportation to deeply un- derstand the drag - reducing mechanism of snrfactant. To understand the turbulent drag - reducing prop- erties and mechanism on surfactant, the drag - reducing experiments of surfactant （CTAC/Nasal） were performed in the channel with cross section of 10 mm× 150 mm, and the rheologic property of drag - re- ducing surfactant solution was measured by the MCR302 rheometer in this paper. The present results show that the maximum drag - reduction rate, the critical drag - reduction Reynolds number and the drag -reduction Reynolds number range are directly dependent on the surfactant concentration, however, the relations between them are nonlinear; the formation and destruction of shear induced structures （i. e. , reticular micelle structures） under the shear action can be applied to well explain the drag - reduction mechanism of surfactant.

关 键 词：小槽道 表面活性剂 CTAC/Nasal 湍流减阻 流变特性 剪切诱导结构 

分 类 号：TQ021.1[化学工程]