Major and minor head losses in a hydraulic flow circuit: experimental measurements and a Moody’s diagram application
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Amaral Madeira, A. (2020). Major and minor head losses in a hydraulic flow circuit: experimental measurements and a Moody’s diagram application. Eclética Química, 45(3), 47–56. https://doi.org/10.26850/1678-4618eqj.v45.3.2020.p47-56

Abstract

Domestic and industrial hydraulic drainage networks have gradually become more complicated because of the cities’ rapid expansion. In surcharged hydraulic systems, the head losses may become rather significant, and should not be neglected because could result in several problems. This work presents an investigation about major and minor head losses in a hydraulic flow circuit, simulating the water transport in a drainage network at room temperature (298.15 K) under atmospheric pressure (101,325 Pa). The losses produced by the fluid viscous effect through the one used cast-iron rectilinear pipe (RP-11) and the localized losses generated by two flow appurtenances, one fully open ball valve (BV-1) and one module of forty-four 90º elbows (90E-8) were experimentally measured. Experimental data generated head-loss curves and their well fitted to potential regressions, displaying correlation coefficients (R2) of 0.9792, 0.9924, and 0.9820 for BV-1, 90E-8, and RP-11, respectively. Head loss experimental equations and local loss coefficients through BV-1 and 90E-8 were determined successfully. The Moody’s diagram application proved to be a quite appropriate tool for an approximate estimation of Darcy-Weisbach friction factor. A good approximation between friction factor values obtained via experimental measurements and the Moody’s diagram was observed with mean absolute deviate of 0.0136.

https://doi.org/10.26850/1678-4618eqj.v45.3.2020.p47-56
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References

Larock, B. E., Jeppson, R. W., Watters, G. Z., Hydraulics of pipeline systems, CRC Press LLC, Boca Raton, 2000.

Jo, J. B., Kim, J. S., Yoon, S. E., Experimental estimation of the head loss coefficient at surcharged four-way junction manholes, Urban Water Journal 15 (8) (2018) 780-789. https://doi.org/10.1080/1573062X.2018.1547408.

Colebrook, C. F., Turbulent flow in pipes, with particular reference to the transition region between the smooth and rough pipe laws, Journal of the Institution of Civil Engineers 11 (4) (1939) 133-156. http://doi.org/10.1680/ijoti.1939.13150.

Moody, L. F., Princeton, N. J., Friction factors for pipe flow, Transactions of the American Society of Mechanical Engineers 66 (1944) 671-681.

Chen, Z., Qian, J-Z., Luo, S-H., Zhan, H-B., Experimental study of friction factor for groundwater flow in a single rough fracture, Journal of Hydrodynamics 21 (6) (2009) 820-825. https://doi.org/10.1016/S1001-6058(08)60218-8.

Zeghadnia, L., Robert, J. L., Achour, B., Explicit solutions for turbulent flow friction factor: A review, assessment and approaches classification, Ain Shams Engineering Journal 10 (1) (2019) 243-252. https://doi.org/10.1016/j.asej.2018.10.007.

Brkić, D., Ćojbašić, Ž., Evolutionary optimization of colebrook’s turbulent flow friction approximations, Fluids 2 (2) (2017) 15. https://doi.org/10.3390/fluids2020015.

LaViolette, M., On the history, science, and technology included in the moody diagram, Journal of Fluids Engineering 139 (3) (2017) 030801. https://doi.org/10.1115/1.4035116.

Graham, L. J. W., Pullum, L., Wu, J., Flow of non-Newtonian fluids in pipes with large roughness, The Canadian Journal of Chemical Engineering 94 (6) (2016) 1102-1107. https://doi.org/10.1002/cjce.22494.

Dobrnjac, M., Determination of friction coefficient in transition flow region for waterworks and pipelines calculation, Annals of the Faculty of Engineering Hunedoara 10 (3) (2012) 137-142. http://annals.fih.upt.ro/pdf-full/2012/ANNALS-2012-3-21.pdf.

Ulusarslan, D., Effect of diameter ratio on loss coefficient of elbows in the flow of low-density spherical capsule trains, Particulate Science and Technology 28 (4) (2010) 348-359. https://doi.org/10.1080/02726351003702558.

Buonicontro, C. M. S., Laboratório de fluidomecânicos: práticas de máquinas de fluxo, PUC Minas, Belo Horizonte, 2010. https://pt.scribd.com/document/56230307/Manual-Laboratorio-MaqFluxo-1%C2%BA2010A.

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