Journal of the Korean Society of Safety (한국안전학회지)

The Korean Society of Safety (한국안전학회)
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Analysis of Hydraulic Characteristics and Reduction of Bottom Velocity of Second Stilling Basin

2차 정수지의 수리특성 및 바닥 유속 저감효과 분석

  • 정석일 (홍익대학교 토목공학과) ;
  • 이지훈 (한국농어촌공사 농어촌연구원) ;
  • 윤재선 (한국농어촌공사 농어촌연구원) ;
  • 이승오 (홍익대학교 토목공학과)
  • Received : 2018.09.03
  • Accepted : 2018.10.25
  • Published : 2018.10.31
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Abstract

Scour in the downstream of hydraulic structures such as apron induces to collapse due to abruptly increasing rainfall and discharge in streams and reaches. This is because the forcible jet from overflowing is not sufficiently dissipated by existing energy dissipators, and it continues to sweep the bed materials during flood events. In this study, a second stilling basin was proposed as a countermeasure and the energy dissipation efficiency of this structure was analyzed using 3D-dimensional numerical analysis. First, results from previous research and hydraulic tests were used to verify the accuracy of the numerical model. It showed that the second stilling basin played a definite role in reducing the bottom velocity, comparing with diminishing the energy dissipation when numerical tests were conducted under scaled field conditions in Korea. This means that the second stilling basin can be a countermeasure against scour in downstream. If more efficiency analysis of the second stilling basin would be performed in terms of energy dissipator for various types of hydraulic jump, it would be an alternative solution to scouring issues.

Keywords

References

  1. Ministry of Land, Infrastructure and Transport, Dam design criteria, 2011.
  2. N. E. Bormann and P. Y. Julien, "Scour Downstream of Grade-control Structures", Journal of Hydraulic Engineering, Vol. 117, No. 5, pp. 579-594, 1991. https://doi.org/10.1061/(ASCE)0733-9429(1991)117:5(579)
  3. A. Salah, "Effect of Semi-circular Baffle Blocks on Local Scour Downstream Clear-overfall Weirs", Ain Shams Engineering Journal, Vol. 4, No. 4, pp. 675-684, 2013. https://doi.org/10.1016/j.asej.2013.03.003
  4. B. K. Choi, T. H. Kang and I. S. Kim, "Degign of the Hydraulic Jump Type Stilling Basin using Sub-dam at Spillway", KSCE 2016 Convention, pp.299-302, 2006.
  5. S. E. Yoon, J. T. Lee, K. I. Son and J. H. Kim, "Examination on the Experimental Prediction of Scour Depths Caused by Jets", Journal of Korea Water Resources Association. Vol.30, No. 6, pp.437-446, 1995.
  6. M. H. Lee and H. S. Choi, "Evaluation on Hydraulic Stability Formulae of Riprap", KSCE 2008 Convention, pp.2944-2947, 2008.
  7. J. P. Davis, "Hydraulic design of navigation locks (No. WES/MP/HL-89-5)", Army Engineer Waterways Experiment Station Vicksburg Ms Hydraulics Lab, 1989.
  8. H. Babaali, A. Shamsai and H. Vosoughifar, "Computational Modeling of the Hydraulic Jump in the Stilling Basin with Convergence walls using CFD Codes", Arabian Journal for Science and Engineering, Vol. 40, No. 2, pp. 381-395, 2015. https://doi.org/10.1007/s13369-014-1466-z
  9. F. Naseri, H. Sarkardeh and E. Jabbari, "Effect of Inlet Flow Condition on Hydrodynamic Parameters of Stilling Basins", Acta Mechanica, Vol. 229, No. 3, pp. 1415-1428, 2018. https://doi.org/10.1007/s00707-017-2069-z
  10. A. Bayon, D. Valero, R. Garcia-Bartual and P. A. Lopez-Jimenez, "Performance assessment of OpenFOAM and FLOW-3D in the Numerical Modeling of a Low Reynolds Number Hydraulic Jump", Environmental Modelling & Software, Vol. 80, pp. 322-335, 2016. https://doi.org/10.1016/j.envsoft.2016.02.018
  11. A. Bayon, D. Valero, R. Garcia-Bartual and P. A. Lopez-Jimenez, "Performance assessment of OpenFOAM and FLOW-3D in the Numerical Modeling of a Low Reynolds Number Hydraulic Jump", Environmental Modelling & Software, Vol. 80, pp. 322-335, 2016. https://doi.org/10.1016/j.envsoft.2016.02.018
  12. S. Fortier and F. C. Scobey, "Permissible Canal Velocities", Transactions of the American Society of Civil Engineers, Vol. 89, No. 1, pp. 940-956, 1926.
  13. F. T. Mavis and L. M. Laushey, "A Reappraisal of the Beginning of Bed Movement-competent Velocity", Proc. of the Int. Assoc. for Hydraulic Research. Stockholm, pp. 213-218, 1948.
  14. C. T. Yang, "Incipient Motion and Sediment Transport", Journal of the Hydraulics Division, Vol. 99, No. 10, pp. 1679-1704, 1973.
  15. S. T. Maynord, J. F. Ruff and S. R. Abt, "Riprap Design", Journal of Hydraulic Engineering, Vol. 115, No. 7, pp. 937-949, 1989. https://doi.org/10.1061/(ASCE)0733-9429(1989)115:7(937)
  16. U. S. Army Corps of Engineers, "Hydraulic Design of Flood Control Channels", EM 1110-2-1601, 1994.
  17. R. W. P. May and M. Escarameia "Channel Protection: Turbulence Downstream of Structures", 1992.
  18. J. W. Ko, J. Y. Kim, T. B. Seo, K. B. Lim and D. H. Rie, "A Study on the Characteristics of Smoke Control using PIV in Tunnel Fires", J. Korean Soc. Saf., Vol. 21, No. 5, pp. 6-11, 2006.
  19. S. I. Jeong and S. O. Lee, "Experimental Analysis for Characteristics of Bank-Scour around Barrier", J. Korean Soc. Saf., Vol. 32, No. 4, pp. 34-39, 2017. https://doi.org/10.14346/JKOSOS.2017.32.4.34