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Experimental Analysis of Flow Characteristics and Bed Changes Over Oblique Weirs

위어 설치각도에 따른 흐름특성 및 하도 변화의 실험적 분석

Chang-Lae Jang1*
,
Gi Jung Kim1
장 창래1*
,
김 기정1
1Department of Civil Engineering, Korea National University of Transportation
1한국교통대학교 토목공학과
*교신저자. *Corresponding Author. 
31 December 2017. pp. 245-254
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Abstract

In this study, the flow characteristics and bed changes in the upstream and downstream of weirs with the variation of the weir angels are investigated quantitatively through the laboratory experiments. As the angle of weir increases, the effective weir length decreases. Delta is developed by the sediments inflow upstream and migrates downstream. Delta migration speed decreases as it approaches to the weir upstream, and the size is getting big. As the dimensionless weir length increases, the dimensionless wave length decreases at the downstream of the weir. However, the dimensionless bar height decreases. The dimensionless wavelength increases with the bar height downstream from the weir.

Keywords
Bar
Delta
Effective weir length
Oblique weir

본 연구에서는 실내실험을 통해 위어의 설치 각도 변화에 대한 위어 상하류에서 흐름특성 변화와 하도 변화를 정량적으로 분석하였다. 위어의 설치 각이 증가함에 따라 위어의 길이는 증가하지만, 위어의 유효길이는 감소하였다. 위어 상류에서는 유사가 퇴적되어 배수가 형성되는 지점에서 델타가 발달하고, 하류로 이동하였다. 델타의 이동속도는 위어에 가까워질수록 감소하며, 크기는 증가하였다. 무차원 위어의 길이가 증가함에 따라, 무차원 사주의 파장이 감소하고, 무차원 사주의 파고는 증가하였다. 무차원 사주의 파장이 증가함에 따라 무차원 사주의 파고는 감소하였다.

키워드
사주
델타
위어 유효길이
경사형 위어
References
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Information
  • Publisher :Korean Society of Ecology and Infrastructure Engineering
  • Publisher(Ko) :응용생태공학회
  • Journal Title :Ecology and Resilient Infrastructure
  • Journal Title(Ko) :응용생태공학회 논문집
  • Volume : 4
  • No :4
  • Pages :245-254
  • Received Date : 2017-11-29
  • Revised Date : 2017-12-08
  • Accepted Date : 2017-12-08
  • DOI :https://doi.org/10.17820/eri.2017.4.4.245
Journal Informaiton Ecology and Resilient Infrastructure Ecology and Resilient Infrastructure
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