微管中去离子水流动的减阻实验研究(宋付权)

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微管中去离子水流动的减阻实验研究

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【作者】宋付权 【作者单位】浙江师范大学

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%xQ*q1V,n5CE4G/[0【论文摘要】 通过减阻剂十六烷基三甲基溴化铵对三种不同口径(75μm、50μm、25μm)的石英微圆管道内表面进行吸附处理,研究微尺度下的超纯水在其中流动的减阻效果.实验过程中,采用体积法测量压力驱动下微圆管道中去离子水的流量,比较减阻剂吸附前后的流量变化.结果表明,加入减阻剂后,去离子水在微圆管道中的流量明显增大。说明在微尺度下,用表面活性剂处理微管具有明显的减阻效果,75μm、50μm、25μm的减阻效果分别为6.40%, 13.38%、11.22%.减阻原因是表面活性剂改变了固体表面的润湿性,当管壁由亲水表面转换为疏水表面,水在其中流动时,在固液界面可以产生滑移效应,从而流动阻力减小.从定性上可以初步说明:在一定尺度下,微管的内径越小,减阻效果越好.

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&\.IbW"JZ}0【英文论文摘要】 Through drag reduction agent cetyl trimethyl ammonium bromide(CTAB) adsorbed on three different diameters micro-channels(75 μm,50 μm,25μm),the effects of DRA on the water flow in micro-tubes are studied.In experiments,the flux of deionized water is measured in a normal state,using volume-driven pressure measurement,and compared with the flow rate changes after joining the reduction agent.The results indicate that the flow rate of deionized water increases obviously in micro-channels after joining the reduction agent.This results show that surfactant treatment of channel has obvious effects of drag reduction,because the surfactant can change the wettability of the solid surface.When the water flows through micro-channels with the hydrophobic interface,the solid-liquid slip interface appears,thereby reducing the resistance to flow.And the flow reductions in 75μm,50μm and 25μm are respectively 6.40%,13.38%,11.22%.It can be qualitatively stated that the smaller the diameter of channel is,t...更多he better the effect of drag reduction is.  还原水利论文3S_ UP#~Br(m)k

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【论文关键词】 微管; 微尺度; 减阻; 表面活性剂水利论文1Rf4`@/R9L`&[[
【英文论文关键词】 micro-channel; micro-scale; surfactant; drag reduction
P1?I-R6~0【基金】国家自然科学基金项目(10302018).水利论文a,x|}8zr$D&I

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TAG: 实验 宋付权 离子水 减阻 微管
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