Experimental study on drag-reducing turbulent boundary layer flows of surfactant solutions

被引：0

作者：

Itoh, M. ^{[1
]}

Inoue, T. ^{[1
]}

Tamano, S. ^{[1
]}

Yokota, K. ^{[1
]}

机构：

[1] Nagoya Inst Technol, Grad Sch Engn, Showa Ku, Nagoya, Aichi 4668555, Japan

来源：

FEDSM 2007: PROCEEDINGS OF THE 5TH JOINT AMSE/JSME FLUIDS ENGINEERING SUMMER CONFERENCE VOL 1, PTS A AND B | 2007年

关键词：

turbulent boundary layer; drag reduction; surfactant solution; LDV measurement;

D O I：

暂无

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In this study, the influence of a drag-reducing surfactant on the turbulent boundary layer under different solution concentrations and temperatures was extensively investigated using a two-component laser-Doppler velocimetry system. It is found that the drag reduction ratio DR at the temperature T = 20 degrees C becomes larger downstream, and decreases with the increase of concentration from C = 65 to 150 ppm. The DR for C = 100 ppm becomes smaller with the increase of the temperature from T = 25 to 35 degrees C, and the DR at T = 20 degrees C is smaller than DR at T = 25 degrees C. For the different solution concentrations and temperatures, the value of the mean velocity scaled by the friction velocity increases with increasing the amount of drag reduction. For the present experimental conditions tested, the peak value of streamwise turbulence intensity seems to be not related to the amount of DR directly and to be affected by the low Reynolds number effect strongly.

引用

页码：247 / 255

页数：9