Drag Reduction for a Rotating Disk with Highly Water-Repellent Wall
Drag Reduction for a Rotating Disk with Highly Water-Repellent Wall
复制标题
具有高防水壁的旋转盘的减阻
DOI：
10.1299/jsmeb.41.556
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发表时间：
1998
期刊：
影响因子：
--
通讯作者：
S. Ogata
中科院分区：
文献类型：
--
作者：
Keizo Watanabe;S. Ogata
通过实验研究，阐明了在牛顿流体中采用高疏水涂层壁面对旋转圆盘的新型减阻作用。对高防水壁和光滑铝壁旋转圆盘的力矩进行了测量。圆盘和外壳壁之间的间隙在5、10和20 mm厚时变化。测试流体为自来水和浓度为30重量%和40重量%的甘油水溶液。与光滑平面圆盘相比，具有高憎水壁面的旋转圆盘的力矩实验数据有所减小。结果表明，在甘油浓度为40wt%的水溶液中，减阻率最大可达45%，而粘度对减阻率的影响不大。
Using a highly water-repellent coating wall, new type of drag reduction for a rotating disk in Newtonian fluid have been clarified experimentally. Measurements were carried out to measure the moment of rotating disks with highly water-repellent-wall and with smooth aluminum wall. The clearance between the disk and the housing wall was varied at 5, 10, and 20 mm thick. Tested fluids were tap water and aqueous solution of glycerin at concentration of 30 wt% ahd 40 wt%. The experimental data of the moment of the rotating disk with highly water-repellent wall in housing decreased comparing with the data of smooth plane disk. It was shown that the maximum drag reduction ratio was about 45% in aqueous solution of glycerin at concentration of 40 wt%, and that the viscous properties had a slight effect upon the drag reduction.