Turbulent drag reduction in nonionic surfactant solutions
Turbulent drag reduction in nonionic surfactant solutions
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DOI：
10.1063/1.3407666
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发表时间：
2010-05
影响因子：
4.6
通讯作者：
Shinji Tamano;M. Itoh;Katsuo Kato;K. Yokota
中科院分区：
文献类型：
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作者：
Shinji Tamano;M. Itoh;Katsuo Kato;K. Yokota
对于无毒、可生物降解的非离子表面活性剂溶液的减阻效果研究较少，而迄今为止对阳离子表面活性剂溶液的研究较多。首先，通过测量溶剂雷诺数 Re 在 1000 至 60 000 之间的管道流中的压降，研究了主要由油基二甲基氧化胺组成的非离子表面活性剂 (AROMOX) 的减阻效果。其次，我们研究了非离子表面活性剂在动量厚度雷诺数 Reθ 下对湍流边界层的减阻效果： 443至814使用双分量激光多普勒测速和粒子图像测速系统。在非离子表面活性剂溶液温度T=25℃下，AROMOX 500 ppm在边界层流中的最大减阻率约为50%，而在管流中减阻率大于60%。 AROMOX 500 ppm 的湍流统计和结构显示了典型的干燥行为...
There are only a few studies on the drag-reducing effect of nonionic surfactant solutions which are nontoxic and biodegradable, while many investigations of cationic surfactant solutions have been performed so far. First, the drag-reducing effects of a nonionic surfactant (AROMOX), which mainly consisted of oleyldimethylamineoxide, was investigated by measuring the pressure drop in the pipe flow at solvent Reynolds numbers Re between 1000 and 60 000. Second, we investigated the drag-reducing effect of a nonionic surfactant on the turbulent boundary layer at momentum-thickness Reynolds numbers Reθ from 443 to 814 using two-component laser-Doppler velocimetry and particle image velocimetry systems. At the temperature of nonionic surfactant solutions, T=25 °C, the maximum drag reduction ratio for AROMOX 500 ppm was about 50%, in the boundary layer flow, although the drag reduction ratio was larger than 60% in pipe flow. Turbulence statistics and structures for AROMOX 500 ppm showed the behavior of typical dr...