Nonasymptotic behavior of developing turbulent pipe flow
Nonasymptotic behavior of developing turbulent pipe flow
复制标题
发展湍流管流的非渐近行为
DOI：
10.1139/p76-032
复制
发表时间：
1976
影响因子：
1.2
通讯作者：
R. Azad
中科院分区：
文献类型：
--
作者：
J. Reichert;R. Azad
对管道入口 70 个直径处的平均速度 U 剖面的详细测量表明，湍流管道流的发展是非渐近的。实验在 56 000–15 3000 范围内的七个雷诺数下进行。针对两个代表性雷诺数给出了 U 和 V 场的轮廓。已发现沿管道中心线出现超过完全展开值的 U 分量峰值。峰位置的雷诺数行为已确定。入口区域平均壁剪切应力的热膜测量也显示出与平均速度结果一致的非渐近发展。
Detailed measurements of mean velocity U profiles, in the inlet 70 diameters of a pipe, show that the development of turbulent pipe flow is nonasymptotic. Experiments were done at seven Reynolds numbers in the range 56 000–15 3000. Contours of U and V fields are presented for two representative Reynolds numbers. A U component peak exceeding the fully developed values has been found to occur along the pipe centerline. The Reynolds number behavior of the peak position has been determined. Hot film measurements of the mean wall shear stresses in the inlet region also show a nonasymptotic development consistent with the mean velocity results.