Turbulent boundary layer on a rotating disk in infinite quiescent fluid
Turbulent boundary layer on a rotating disk in infinite quiescent fluid
复制标题
无限静止流体中旋转盘上的湍流边界层
DOI：
10.1299/jsmeb.37.449
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发表时间：
1994
期刊：
影响因子：
--
通讯作者：
I. Hasegawa
中科院分区：
文献类型：
--
作者：
M. Itoh;I. Hasegawa
对旋转圆盘在无限大静止流体中的湍流流动进行了实验研究。在不同的局部雷诺数Rel(=γ2ω/ν)下，采用单一的法向和倾斜型热线，得到了平均速度分布和雷诺应力的全部6个分量。在Rel≥4×10~5处，观测到了一个对数律区域，在该区域内，周向速度剖面呈半对数曲线的线性变化。当Rel=1.0×106时，对数律区域的廓线与平板边界层的廓线基本一致。用摩擦速度归一化的湍流强度的所有分量都比平板边界层的分量小得多，除了非常靠近壁面的地方。结构参数A1的取值小于平板边界层的取值。
An experimental study of the turbulent flow due to a rotating disk in an infinite quiescent fluid was conducted. Using a single normal- and an inclined-type hot wire, the mean velocity distributions and all six components of Reynolds stress were obtained for various local Reynolds numbers ReL(=γ2ω/ν). A log-law region, where the circumferential velocity profile shows a linear variation in a semilogarithmic plot, was observed at ReL≥4×105. The profile in the log-law region at ReL=1.0×106 was in close agreement with that for the flat-plate boundary layer. All components of the turbulence intensity, normalized by the friction velocity, were found to be considerably smaller than those for the flat-plate boundary layer, except very near the wall. The values of the structure parameter a1 are smaller than those for the flat-plate boundary layer.