Experimental determination of head losses in bends and contractions in pipe systems

Scurtu, Aneta (2014) Experimental determination of head losses in bends and contractions in pipe systems. BEng dissertation, University of Portsmouth.

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    Abstract

    Experimental determination of head losses in bends and contractions in pipe systems is presented in this report. The Armfield Fluid Friction Measurements unit was used to test four different types of bends: a long radius 90˚ bend, a 90˚ elbow, a 45˚ elbow and a 90˚ mitre, to investigate the effect of different types of bends in the hydraulic design of pipe systems. The same technique was used to assess the influence of a sudden pipe contraction on flow-head loss relationship in the system. Finally, the results showed new value of the fitting loss coefficient K. All data collected indicated that K-value calculated from the lower velocities is much higher than from the fully developed flow rates. A long radius 90˚ bend K-value was the only value close to the predictions. Other tested components showed much higher head loss coefficients. The study identified a need of application of the Reynolds number and component geometry in derivation of K-factors. The experimental data shows this pattern. Information collected reveals the need of further research in area of importance of the head losses in the shorter systems.

    Item Type: Dissertation
    Departments/Research Groups: Faculty of Technology > School of Civil Engineering and Surveying
    Depositing User: Beth Atkins
    Date Deposited: 16 Jan 2015 14:56
    Last Modified: 28 Jan 2015 12:47
    URI: http://eprints.port.ac.uk/id/eprint/16463

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