Further experiments for mean velocity profile of pipe flow at high Reynolds number
Further experiments for mean velocity profile of pipe flow at high Reynolds number
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DOI：
10.1063/1.5017261
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发表时间：
2018-05-01
影响因子：
4.6
通讯作者：
Tsuji, Y.
中科院分区：
文献类型：
--
作者：
Furuichi, N.;Terao, Y.;Tsuji, Y.
本文报道了在日本高雷诺数实流装置上获得的进一步实验结果。实验是在有水的管流中进行的，摩阻雷诺数Re-tau=5.3×10(4)。这种高的雷诺数是以水为工质，采用大直径(387 Mm)的管子，同时以高精度和高精度控制流量和温度而实现的。用激光多普勒测速仪测量了近壁面的流向速度，得到了对数分布U+=(1/kappa)ln(y(+))+B的平均速度分布。在仔细验证了平均速度分布的流量精度，并评价了当前结果与以前在较小管道(100 Mm)中的测量结果的一致性后，发现kappa值渐近于一个常数kappa值=0.384。由AIP出版公司出版。
This paper reports further experimental results obtained in high Reynolds number actual flow facility in Japan. The experiments were performed in a pipe flow with water, and the friction Reynolds number was varied up to Re-tau = 5.3 x 10(4). This high Reynolds number was achieved by using water as the working fluid and adopting a large-diameter pipe (387 mm) while controlling the flow rate and temperature with high accuracy and precision. The streamwise velocitywas measured by laser Doppler velocimetry close to the wall, and the mean velocity profile, called log-law profile U+ = (1/kappa) ln(y(+)) + B, is especially focused. After careful verification of the mean velocity profiles in terms of the flow rate accuracy and an evaluation of the consistency of the present results with those from previously measurements in a smaller pipe (100 mm), it was found that the value of kappa asymptotically approaches a constant value of kappa = 0.384. Published by AIP Publishing.