Experimental Study of Surfactant Drag2Reducing Flow in 2-D Channel at Sub-ero Temperature

doi:10.7652/xjtuxb200601019

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Experimental Study of Surfactant Drag2Reducing Flow in 2-D Channel at Sub-ero Temperature

更新时间：2025-07-09

- Experimental Study of Surfactant Drag2Reducing Flow in 2-D Channel at Sub-ero Temperature
- Vol. 40, Issue 1, Pages: 79-0084(2006)
- 作者机构：
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- DOI：10.7652/xjtuxb200601019
  CLC： TQ316
- Online First：10 January 2006，
  
  Published：2006
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Experimental Study of Surfactant Drag2Reducing Flow in 2-D Channel at Sub-ero Temperature

[J]. 2006, 40(1): 79-0084. DOI: 10.7652/xjtuxb200601019.
DOI：

Experimental Study of Surfactant Drag2Reducing Flow in 2-D Channel at Sub-ero Temperature

[J]. 2006, 40(1): 79-0084. DOI: 10.7652/xjtuxb200601019. DOI：

摘要

为了进行零下温度时区域供冷系统的界面活性剂减阻设计

测量了- 5 ℃时以质量分数为 20 %的甘醇不冻液为溶剂的界面活性剂溶液油醇基二羟乙基甲基氯化铵在二维通道内的减阻特 性

同时用粒子成像测速仪对减阻流动的湍流特性进行了测量. 实验发现:质量分数为5 ×10 - 5 ～ 5 ×10 - 4的低浓度油醇基二羟乙基甲基氯化铵界面活性剂溶液在一定的雷诺数范围内均呈现减阻 特性

且其减阻特性与质量分数和温度呈复杂关系

最大减阻值可高达70 %以上;在湍流液体中只 需加入少量该界面活性剂即可大幅度减少液体输送的动力消耗. 与单独的质量分数为20 %的甘醇 不冻液湍流流动相比

添加界面活性剂抑制了湍流速度脉动

使雷诺应力完全消失.

Abstract

To design an efficient dist rict cooling system with surfactant drag reduction at sub-ero temperat ure

t he drag2reducing characteristics of Et hoquad O12/ NaSal surfactant solution were measured wit h a 20 % mass2f raction ethylene glycol aqueous solution ( EG/ W) as solvent in a 2OD channel at - 5 -

and the t urbulence feat ures of the surfactant drag2reducing flow were al so measured via particle image velocimet ry ( PIV) technique. It is found t hat t he Et hoquad O12/ NaSal surfactant flowing wit h low mass f raction ranging f rom 5 -10 - 5 to 5 -10 - 4 demonst rates t he maximum drag reduction above 70 %

and a complicated relationship of the drag2reducing characteristics with mass f raction and temperat ure. Added only small amount of t his surfactant into t he liquid t urbulent flow

t he p umping energy is reduced greatly during t he liquid t ransporta2 tion. Compared wit h EG/ W turbulent flow

t he added surfactant suppre

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