Estimating the value of von Karman's constant in turbulent pipe flow

被引：78

作者：

Bailey, S. C. C. ^{[1
]}

Vallikivi, M. ^{[2
]}

Hultmark, M. ^{[2
]}

Smits, A. J. ^{[2
,3
]}

机构：

[1] Univ Kentucky, Dept Mech Engn, Lexington, KY 40506 USA

[2] Princeton Univ, Dept Mech & Aerosp Engn, Princeton, NJ 08544 USA

[3] Monash Univ, Dept Mech & Aerosp Engn, Clayton, Vic 3800, Australia

来源：

JOURNAL OF FLUID MECHANICS | 2014年 / 749卷

关键词：

turbulent boundary layers; turbulent flows; WALL; LAW; SMOOTH; REGION;

D O I：

10.1017/jfm.2014.208

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

Five separate data sets on the mean velocity distributions in the Princeton University/ONR Superpipe are used to establish the best estimate for the value of von Karman's constant for the flow in a fully developed, hydraulically smooth pipe. The profiles were taken using Pitot tubes, conventional hot wires and nanoscale thermal anemometry probes. The value of the constant was found to vary significantly due to measurement uncertainties in the mean velocity, friction velocity and the wall distance, and the number of data points included in the analysis. The best estimate for the von Karman constant in turbulent pipe flow is found to be 0.40 +/- 0.02. A more precise estimate will require improved instrumentation.

引用

页码：79 / 98

页数：20

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