Turbulence measurements of drag reducing surfactant systems
Turbulence measurements of drag reducing surfactant systems
复制标题
减阻表面活性剂体系的湍流测量
DOI：
10.1007/bf00188503
复制
发表时间：
1993
影响因子：
2.4
通讯作者：
J. Myška
中科院分区：
文献类型：
--
作者：
Z. Chára;J. Zakin;M. Severa;J. Myška
在直径39.4 mm的管内进行了LDA测量，首次在三个方向上测量了减阻表面活性剂溶液(0.05%和0.1%Habon G)的平均速度和湍流强度。减阻效果超过了Virk最大减阻渐近线的预测，弹性小层平均速度剖面比Virk提出的最大减阻渐近线解的剖面更陡峭。哈邦G溶液的轴向湍流强度高于壁面附近水的轴向湍流强度，外围大部分区域的轴向湍流强度较低，中心区域的轴向湍流强度基本相同。切向和径向湍流强度均低于水的湍流强度。
LDA measurements were made of mean velocity and of turbulence intensity in a 39.4mm diameter tube, the first measurements in three directions on drag reducing surfactant solutions (0.05% and 0.1% Habon G). Drag reduction exceeded the predictions of the Virk maximum drag reduction asymptote and elastic sublayer mean velocity profiles are steeper than the profile proposed by Virk for maximum drag reducing asymptote solutions. Axial turbulence intensities for Habon G solutions are higher than those for water near the wall, lower in most of the outer region and about the same at the center. Tangential and radial turbulence intensities are lower than those for water.