Drag reduction caused by the injection of polymer thread into a turbulent pipe flow
Drag reduction caused by the injection of polymer thread into a turbulent pipe flow
复制标题
将聚合物丝注入湍流管流中可减少阻力
DOI：
10.1063/1.866605
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发表时间：
1988
影响因子：
4.6
通讯作者：
Y. Sano
中科院分区：
文献类型：
--
作者：
H. Usui;K. Maeguchi;Y. Sano
研究了在紊流管内注入浓聚聚合物溶液的减阻效果。采用视频图像分析的方法测量了波动速度的径向分布。结果表明，注入聚合物螺纹的速度更高，径向波动和雷诺应力都得到了显著抑制。认为壁面湍流结构可以通过抑制湍流核心区的大尺度湍流运动来控制。
Drag reduction caused by the injection of concentrated polymer solutions into a turbulent pipe flow was studied. Measurements were made of the radial distribution of fluctuating velocities by means of video image analysis. The results showed that a higher velocity was observed for injected polymer threads and both the radial fluctuation and the Reynolds stress were significantly suppressed. It was suggested that the wall turbulence structure might be controlled by suppressing the large scale turbulent motion in the turbulent core region.