상하수도학회지 (Journal of Korean Society of Water and Wastewater)

  • 제27권3호
  • /
  • Pages.383-394
  • /
  • 2013
  • /
  • 1225-7672(pISSN)
  • /
  • 2287-822X(eISSN)
대한상하수도학회 (The Korean Society of Water and Wastewater)
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3차원 수치모의를 통한 침사지에서의 부유사 밀도류 해석

Three-dimensional numerical modeling of sediment-induced density currents in a sedimentation basin

  • 안상도 (한국수자원공사 낙동강통합물관리센터) ;
  • 김기호 (한국수자원공사 낙동강통합물관리센터) ;
  • 박원철 (한국수자원공사 해외사업처)
  • An, Sang Do (K-water Nakdong River Integrated Operations Center) ;
  • Kim, Gi-Ho (K-water Nakdong River Integrated Operations Center) ;
  • Park, Won Cheol (K-water Overseas Business Dept.)
  • 투고 : 2012.11.09
  • 심사 : 2013.06.14
  • 발행 : 2013.06.15
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초록

A sedimentation basin is used to remove suspended sediments which can cause abrasive and erosive wear on hydraulic turbines of hydropower plants. This sediment erosion not only decreases efficiency of the turbine but also increases maintenance costs. In this study, the three-dimensional numerical simulations were carried out on the overseas hydropower project. The simulations of flow and suspended sediment concentration were obtained using FLOW-3D computational fluid dynamics code. The simulations provide removal efficiency of a sedimentation basin based on particle sizes. The influence of baffles on the flow field and the removal efficiency of suspended sediments in the sedimentation basin has been investigated. This paper also provides the numerical simulations for sediment-induced density currents that may occur in the sedimentation basin. The simulation results indicate that the formation of density currents decreases the removal efficiency. When a baffle is installed in the sedimentation basin, the baffle provides intensive settling zones resulting in increasing the sediments settling. Thus the enhanced removal efficiency can be achieved by installing the baffle inside the sedimentation basin.

키워드

참고문헌

  1. 건설교통부 (1997) 침전지에서의 부유물질 경감에 관한 연구보고서, 한양대학교, pp. 83.
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피인용 문헌

  1. Scaled-Down Experiments and Numerical Simulations for the Design of a Retention Tank with Rotatable Bucket vol.144, pp.9, 2018, https://doi.org/10.1061/(ASCE)EE.1943-7870.0001436
  2. VOF 다상유동 해석을 이용한 침사지 유동특성 연구 vol.19, pp.2, 2013, https://doi.org/10.5407/jksv.2021.19.2.063