Journal of Korean Society of Water and Wastewater (상하수도학회지)

The Korean Society of Water and Wastewater (대한상하수도학회)
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Analysis of characteristics of sediment transport in sewers by densimetric Froude number

밀도프루드수에 의한 하수관로 침전물 이송 특성 분석

  • Park, Kyoohong (Department of Civil Engineering, Chung-Ang University) ;
  • Lee, Taehoon (Department of Civil Engineering, Chung-Ang University) ;
  • Yu, Soonyu (Department of Consilience, ADD at Korea Polytechnic University) ;
  • Kang, Byongjun (Department of Civil Engineering, Chung-Ang University) ;
  • Hyun, Kirim (Department of Civil Engineering, Chung-Ang University)
  • 박규홍 (중앙대학교 사회기반시스템공학부) ;
  • 이태훈 (중앙대학교 사회기반시스템공학부) ;
  • 유순유 (한국산업기술대학교 지식융합학부) ;
  • 강병준 (중앙대학교 사회기반시스템공학부) ;
  • 현기림 (중앙대학교 사회기반시스템공학부)
  • Received : 2019.05.16
  • Accepted : 2020.01.30
  • Published : 2020.02.15
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Abstract

Even though sewers have been conventionally designed to prevent from sediment deposition using a specified minimum velocity or shear stress at a particular depth of flow or with a particular frequency of occurrence, it was appreciated that these methods do not consider the characteristics and concentration of the sediment and the specific hydraulic conditions of the sewer with sediment. In this study, a densimetric Froude number formula was suggested considering particle diameter and volumetric concentration of the sediment as well as flow depth and flowrate, based on several domestic field inspections, which was compared with other formulas proposed by previous investigators. When the sediment concentration was not considered, the calibration coefficient of 0.125-1.5 to the densimetric Froude numbers of this study was needed to obtain the similar ones with previous investigators'. For the densimetric Froude number formula obtained with consideration of sediment concentration, the exponent value of term Cv was almost the same as that of previous results and that of d50/Rh was similar for Fr < 2.2.

Keywords

References

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