Experimental and CFD Analysis of Circular Labyrinth Weirs
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VIEW THE REPLYPublication: Journal of Irrigation and Drainage Engineering
Volume 144, Issue 6
Abstract
Labyrinth weirs present an effective solution for high discharge efficiency in space-restrictive situations. However, these weirs exhibit negative effects (vibrations, noise, and instability) when the nappe clings to the downstream surface of the weir because of subatmospheric pressures. Nappe breakers are used to limit the occurrence of this behavior. Currently, only a limited number of investigations have focused on the performance of nappe breakers when applied to circular labyrinth weirs. The present study has been designed to provide detailed performance data for sharp-crested circular labyrinth weirs for the case of a simple weir as well an augmented weir (with nappe breaker). Three-dimensional (3D) computational fluid dynamics (CFD) models were verified by comparison with the experimental observations, and then the pressures under the jet flow at the downstream of the weir were scrutinized using a two-phase (water-air) turbulent numerical model. The results of both the numerical simulations and experimental observations confirm the positive outcomes obtained through the use of the nappe breakers to control subatmospheric pressures on the downstream face of the weir.
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Acknowledgments
This study was supported by the Scientific Research Project Department of Firat University, Turkey under Project No. 1610.
References
Anderson, A. A. (2014). “Causes and countermeasures for nappe oscillation: An experimental approach.” M.S. thesis, Utah State Univ., Logan, UT.
Aydin, M. C. (2012). “CFD simulation of free-surface flow over triangular labyrinth side weir.” Adv. Eng. Software, 45(1), 159–166.
Aydin, M. C., and Emiroglu, M. E. (2013). “Determination of capacity of labyrinth side weir by CFD.” Flow Meas. Instrum., 29, 1–8.
Aydin, M. C., and Emiroglu, M. E. (2016). “Numerical analysis of subcritical flow over two-cycle trapezoidal labyrinth side weir.” Flow Meas. Instrum., 48, 20–28.
Bilhan, O., Emiroglu, M. E., and Miller, C. J. (2016). “Experimental investigation of discharge capacity of labyrinth weirs with and without nappe breakers.” World J. Mech., 6(07), 207–221.
Crookston, B. M., Paxson, G. S., and Savage, B. M. (2012). “Hydraulic performance of labyrinth weirs for high headwater ratios.” Proc., 4th IAHR Int. Symp. on Hydraulic Structures, Porto, Portugal, 9–11.
Crookston, B. M., and Tullis, B. P. (2011). “The design and analysis of labyrinth weirs.” 21st Century Dam Design-Advances and Adaptations, 31st Annual USSD Conf., San Diego, 11–15.
Crookston, B. M., and Tullis, B. P. (2012a). “Arced labyrinth weirs.” J. Hydraul. Eng., 555–562.
Crookston, B. M., and Tullis, B. P. (2012b). “Labyrinth weirs: Nappe interference and local submergence.” J. Irrig. Drain. Eng., 757–765.
Crookston, B. M., and Tullis, B. P. (2013a). “Hydraulic design and analysis of labyrinth weirs. I: Discharge relationships.” J. Irrig. Drain. Eng., 363–370.
Crookston, B. M., and Tullis, B. P. (2013b). “Hydraulic design and analysis of labyrinth weirs. II: Nappe aeration, instability, and vibration.” J. Irrig. Drain. Eng., 371–377.
Dabling, M., Tullis, B., and Crookston, B. (2013). “Staged labyrinth weir hydraulics.” J. Irrig. Drain. Eng., 955–960.
Falvey, H. T. (2003). Hydraulic design of labyrinth weirs, ASCE, Reston, VA.
FLOW-3D version 11.2 [Computer software]. Flow Science, Inc., Santa Fe, NM.
Hay, N., and Taylor, G. (1970). “Performance and design of labyrinth weirs.” J. Hydraul. Div., 96(11), 2337–2357.
Hinchliff, D., and Houston, K. (1984). “Hydraulic design and application of labyrinth spillways.” Proc., 4th Annual USCOLD Lecture, Dam Safety and Rehabilitation, Bureau of Reclamation, U.S. Dept. of the Interior, Washington, DC.
Hirt, C. W., and Nichols, B. D. (1981). “Volume of fluid (VOF) method for the dynamics of free boundaries.” J. Comput. Phys., 39(1), 201–225.
Kaya, N., Emiroglu, M. E., and Agaccioglu, H. (2011). “Discharge coefficient of a semi-elliptical side weir in subcritical flow.” Flow Meas. Instrum., 22(1), 25–32.
Khode, B. V., Tembhurkar, A. R., Porey, P. D., and Ingle, R. N. (2012). “Experimental studies on flow over labyrinth weir.” J. Irrig. Drain. Eng., 548–552.
Paxson, G., and Savage, B. (2006). “Labyrinth spillways: Comparison of two popular U.S.A. design methods and consideration of non-standard approach conditions and geometries.” International junior researcher and engineer workshop on hydraulic structures, J. Matos and H. Chanson, eds., Univ. of Queensland, Brisbane, Australia, 37–46.
Savage, B. M., Crookston, B. M., and Paxson, G. S. (2016). “Physical and numerical modeling of large headwater ratios for a 15° labyrinth spillway.” J. Hydraul. Eng., 04016046.
Taylor, G. (1968). The performance of labyrinth weirs, Univ. of Nottingham, Nottingham, U.K.
Tullis, J. P., Amanian, N., and Waldron, D. (1995). “Design of labyrinth spillways.” J. Hydraul. Eng., 247–255.
Yildiz, D., and Uzucek, E. (1996). “Modeling the performance of labyrinth spillways.” Int. J. Hydropower Dams, 3, 71–76.
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Published In
Journal of Irrigation and Drainage Engineering
Volume 144 • Issue 6 • June 2018
Copyright
©2018 American Society of Civil Engineers.
History
Received: Jun 22, 2017
Accepted: Dec 19, 2017
Published online: Mar 20, 2018
Published in print: Jun 1, 2018
Discussion open until: Aug 20, 2018
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