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네 개의 수로가 비대칭으로 연결된 수로 합류부에서의 홍수흐름 특성에 관한 연구

A Study on Characteristics of Flood Flow at a Channel Confluence Connected Asymmetrically with Four Channels

  • 정우창 (경남대학교 공과대학 토목공학과)
  • 투고 : 2013.03.06
  • 심사 : 2013.04.30
  • 발행 : 2013.07.31

초록

본 연구에서는 수로가 비대칭으로 연결되어 있는 합류부 및 합류부 주위에서의 홍수흐름특성에 대해 수리모형실험 및 수치모의를 통해 분석을 수행하였다. 본 연구에서 적용된 수치모형은 상업용 3차원 CFD 모형인 ANSYS CFX(ver. 14)이다. 수로 내로 유입되는 유량변화에 따른 수리모형실험과 수치모의에 의한 합류부 및 합류부 주위에서의 수심분포에 대한 측정된 결과와 모의된 결과를 비교한 결과 비교적 잘 일치하는 것으로 나타났다. 합류부와 연결된 네 개의 수로중 물이 유입되는 두개 수로 방향에 따라 합류부 및 합류부 주위에서의 수심분포의 양상은 달라지며, 수로내로 유입되는 유량의 증가에 따라서도 많은 차이가 발생된다는 것을 확인하였다.

In this study, the hydraulic model experiments and numerical simulations are carried out to analyze the flood flow characteristics in and around a channel confluence connected asymmetrically with four channels. The numerical model applied in this study is ANSYS CFX (ver. 14) which is the commercial three-dimensional CFD model. As results of comparison between the measured and simulated water depth distributions in and around a channel confluence, the agreement is relatively well satisfied. It can be shown in this study that the water surface profiles in and around a channel confluence are significant different with the two channel directions in which the water are entering and increased inflow.

키워드

참고문헌

  1. ANSYS Inc. (2010) ANSYS CFX-solver theory guide. Release 13.0, pp. 1-390.
  2. Best, J.L., and Reid, I. (1984). "Separation zone at openchannel junctions." Journal of Hydraulic Engineering, Vol. 110, No. 11, pp. 1588-1594. https://doi.org/10.1061/(ASCE)0733-9429(1984)110:11(1588)
  3. Bowers, C.E. (1966). "Study of open channel junctions. Technical paper." Part V of Hydraulic model studies for Whiting Field Naval Air Station, Vol. 6(B), pp.1-250.
  4. Ghostine, R., Kesserwani, G., Vazquez, J., Riviere, N., and Chenaim, A. (2009). "Simulation of supercritical flow in crossraods: Confrontation of a 2D and 3D numerical approaches to experimental results." Computer & Fluids, Vol. 38, pp. 425-432. https://doi.org/10.1016/j.compfluid.2008.05.003
  5. Huang, J.C., Weber, L.J., and Lai, Y.G. (2002). "Threedimensional numerical study of flows in open-channel junctions." Journal of Hydraulic Engineering, Vol. 128, No. 3, pp. 268-280. https://doi.org/10.1061/(ASCE)0733-9429(2002)128:3(268)
  6. Jeong, W.C., Lee, J.W., and Cho, Y.S. (2010) "A Numerical Study on Characteristics of Flow in a Crossroad: Case of Crossroad Connected Symmetrically with Inclined Four Roads." Journal of Korean Society of Hazard Mitigation, Vol. 10, No. 6, pp. 99-108.
  7. Khan, A.A., Cadavid, R., and Wang, S.S.Y. (2000). "Simulation of channel confluence and bifurcation using the CCHE2D model." Water and Maritime Engineering, Vol. 142, pp. 97-102. https://doi.org/10.1680/wame.2000.142.2.97
  8. Mignot, E. (2005). Etude experimentale et numerique de l'inondation d'une zone urbanisee: cas des ecoulements dans les carrefours en croix. Ph.D. thesis, Ecole Centrale de Lyon, Lyon, France.
  9. Mignot, E., Paquier, A., and Riviere, N. (2008). "Experimental and numerical modeling of symmetrical fourbranch supercritical cross junction flow." Journal of Hydraulic Research, Vol. 46, No. 6, pp. 723-738.
  10. Nania, L.S., Gomez, M., and Dolz, J. (2004). "Experimental study of the dividing flow in steep street crossings." Journal of Hydraulic Research, Vol. 42, No. 4, pp. 406-412. https://doi.org/10.1080/00221686.2004.9728406
  11. Neary, V.S., Sotiropoulos, F., and Odgaard, A.J. (1999). "Three-dimensional numerical model of lateral-intake inflows." Journal of Hydraulic Engineering, Vol. 125, No. 2, pp. 126-140. https://doi.org/10.1061/(ASCE)0733-9429(1999)125:2(126)
  12. Paquier, A. (1995). Modelisation et simulation de la propagation de l'onde de rupture de barrage. Ph.D. thesis, Universite de Jean Monnet de Saint Etienne, Saint Etienne, France.
  13. Riviere, N., and Perkins, R.J. (2004). "Supercritical flow in channel intersections." Proceedings of the 2nd International Conference on Fluvial hydraulics, Grecco, Carravetta and Della Morte Eds, River Flow 2004, Napoli, Italy, 23-25 June 2004, pp. 1073-1077.
  14. Schwalt, M., and Hager, W.H. (1995). "Experiments to supercritical junction flow." Experiments in Fluids, Vol. 18, pp. 429-437. https://doi.org/10.1007/BF00208465
  15. Shetter, A.S., and Murthy, K.K. (1996). "A numerical study of division of flow in open channels." Journal of Hydraulic Research, Vol. 34, No. 5, pp. 651-675. https://doi.org/10.1080/00221689609498464
  16. Shumate, E.D. (1998). Experimental description of combining flows at an open channel junction. Master thesis, University of Iowa, Iowa, USA.
  17. Weber, L.J., Schumate, E.D., and Mawer, N. (2001). "Experiment on flow at a $90^{\circ}$ open-channel junction." Journal of Hydraulic Engineering, Vol. 127, No. 5, pp. 340-350. https://doi.org/10.1061/(ASCE)0733-9429(2001)127:5(340)

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