| This paper introduced the experimental data of three kinds of surfactant solution: sodium dodecyl sulfate (SDS), sodium laurylsulfonate (AS), cetyltrimethylammonium chloride (CTAC). Experiments on aggregation number, turbulent drag reduction and shear-rate dependent shear viscosity were performed for solution of SDS and 200ppm CTAC/NaSal, respectively. The relationships among these three parameters were analyzed and discussed.In order to deepening understanding the drag reduction phenomenon and promoting practical application of surfactant drag reduction. Some aspects as followed on this thought are presented.Firstly, steady-state fluorescent quenching method was utilized for measurement of aggregation number, Nm, of surfactant. The steady-state fluorescent quenching technique belongs to fluorescence probing methods, which uses a fluorescent probe, commonly pyrene in the case of aqueous solution. Nm of surfactant, i.e., the number of surfactant monomers forming a micelle, is a structurally relevant parameter that contains indirect information on the micelle geometries.Secondly, Drag reduction was measured in two closed loop fluid flow facilities. The test sections are acrylic resin tube with inner diameter of 0.025m and length of 1.4m and channel with height of 0.01 m, width of 0.125 m and length of 3.0 m, respectively. The pressure drop was measured with a differential pressure transducer and flow rate was measured with an electromagnetic flow meter.Thirdly, with the help of professor Wei of Xi'an Jiaotong University, shear viscosity of SDS and CTAC/NaSal at different concentration, temperature, shear rate and counterion ratio was determined with ARES made by Rheometrics Scientific F .E. Ltd.Finally, The relationships among the shear viscosity, turbulent drag reduction and aggregation number that can indirectly characterizes the micellar microstructures in surfactant solution have been analyzed. |
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