Flow in a commercial steel pipe

被引：77

作者：

Langelandsvik, L. I. ^{[1
]}

Kunkel, G. J. ^{[2
]}

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

机构：

[1] Norwegian Univ Sci & Technol, Dept Energy & Proc Engn, N-7491 Trondheim, Norway

[2] Princeton Univ, Dept Mech & Aerosp Engn, Princeton, NJ 08540 USA

来源：

JOURNAL OF FLUID MECHANICS | 2008年 / 595卷

基金：

美国国家科学基金会;

关键词：

D O I：

10.1017/S0022112007009305

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

Mean flow measurements are obtained in a commercial steel pipe with krms/D= 1/26000, where k(rms) is the roughness height and D the pipe diameter, covering the smooth, transitionally rough, and fully rough regimes. The results indicate a transition from smooth to rough flow that is much more abrupt than the Colebrook transitional roughness function suggests. The equivalent sandgrain roughness was found to be 1.6 times the r.m.s. roughness height, in sharp contrast to the value of 3.0 to 5.0 that is commonly used. The difference amounts to a reduction in pressure drop for a given flow rate of at least 13 % in the fully rough regime. The mean velocity profiles support Townsend's similarity hypothesis for flow over rough surfaces.

引用

页码：323 / 339

页数：17

共 30 条

[1] Evaluation of a universal transitional resistance diagram for pipes with honed surfaces [J].

Allen, JJ ;

Shockling, MA ;

Smits, AJ .

PHYSICS OF FLUIDS, 2005, 17 (12) :1-4

[2]

BAUER B, 1936, ARCH WAERMEWIRTSCHAF, V17, P125

[3]

BLASIUS H, 1913, FORSCHG ARB ING, V135

[4] A note on "critical roughness height" and "transitional roughness" [J].

Bradshaw, P .

PHYSICS OF FLUIDS, 2000, 12 (06) :1611-1614

[5]

CHUE SH, 1975, PROG AEROSPACE SCI, V16, P1

[6] Experiments with fluid friction in roughened pipes [J].

Colebrook, CF ;

White, CM .

PROCEEDINGS OF THE ROYAL SOCIETY OF LONDON SERIES A-MATHEMATICAL AND PHYSICAL SCIENCES, 1937, 161 (A906) :367-381

[7]

Colebrook CF., 1939, Journal of the Institution of Civil Engineers, V11, P133, DOI [10.1680/ijoti.1939.13150, DOI 10.1680/IJOTI.1939.13150]

[8] Experimental support for Townsend's Reynolds number similarity hypothesis on rough walls [J].

Flack, KA ;

Schultz, MP ;

Shapiro, TA .

PHYSICS OF FLUIDS, 2005, 17 (03) :035102-1

[9]

GALAVICS F, 1939, SCHWEIZ ARCH, V5, P337

[10]

Gersten K, 2000, OIL GAS J, V98, P58

← 1 2 3 →