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Technical Briefs

Friction Factor for Transient Flow in Transverse Corrugated Pipes

[+] Author and Article Information
C. O. Popiel

Professor
e-mail: czeslaw.oleskowicz-popiel@put.poznan.pl

A. Michalak

Research Assistant
Department of Civil and Environmental Engineering,
Poznan University of Technology,
Piotrowo 3A,
Poznan, 60-965, Poland

1Corresponding author.

Contributed by the Fluids Engineering Division of ASME for publication in the JOURNAL OF FLUIDS ENGINEERING. Manuscript received May 18, 2012; final manuscript received December 19, 2012; published online May 17, 2013. Assoc. Editor: Mark F. Tachie.

J. Fluids Eng 135(7), 074501 (May 17, 2013) (4 pages) Paper No: FE-12-1250; doi: 10.1115/1.4023945 History: Received May 18, 2012; Revised December 19, 2012

Since the pressure losses in corrugated pipe flows are very high, their friction factor was investigated experimentally. Results of measurements of friction factor in laminar to turbulent transition zone of water flow in transverse corrugated pipes having regular roughness of approximately sinusoidal type are presented. The friction factors for four investigated commercially available pipes are increasing asymptotically to some maximum values with rising Reynolds number. Results were obtained for the corrugation depth to minimum diameter ratios, 0.103 ≤ e/d ≤ 0.148 and for the relative corrugation pitch, 0.462 ≥ P/d ≥ 0.270.

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References

Figures

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Fig. 1

Samples of tested transverse corrugated pipes

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Fig. 2

Shape of transverse corrugated pipe

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Fig. 3

Schematic diagram of the experimental setup

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Fig. 4

Friction factor versus Reynolds number for tested corrugated pipes and for smooth and rough pipes

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