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2020 Vol.7, Issue 3 Preview Page

Special Feature: Original Article

An Experiment on Flow Simulation Depending on Opening Configuration of Weir Using a Numerical Model

수치모형을 이용한 보의 개방구성에 따른 흐름모의 실험

Tae Un Kang1
,
Chang-Lae Jang2*
강 태운1
,
장 창래2*
1JSPS Research Fellow, Kyoto University, Kyoto 615-8540, Japan
2Professor, Department of Civil Engineering, Korea National University of Transportation, Chungju 27460, Korea
1교토대학교 JSPS 리서치 펠로우
2한국교통대학교 토목공학과 교수
* Corresponding Author
30 September 2020. pp. 218-226
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Abstract

This study investigated that the numerical experiment for analysis on free overtopping flow by a weir of levee type, as the first stage of the development of a numerical technique for prediction methodology based on a numerical model. Using 2-dimensional flow models, Nays2DH, we conducted numerical simulations based on existing experimental data to compare and verify the models. We firstly discussed the numerical reproducibility for the discontinued flow by weir shape, and calibrated the computational flow through preprocessing of channel bed. Further, we carried out and compared the simulations for prediction on the overtopping flow by the number of weir gates. As a result of simulations, we found that the maximum flow velocity of downstream of weir increases when the number of weir gates increases under the same cross sectional area of flow. Through such results, this study could present basic data for hydraulic research to consider the water flow and sediment transport depending on weir operation in the future work.

Keywords
2D flow model
Bed deformation
Numerical simulation
Weir operation

본 연구는 수치모형을 기반으로 하는 예측방법론을 위한 수치기법개발의 첫 단계로서 제방형 보에 의한 자유형 월류흐름에 대한 수치해석실험을 수행하였다. 이를 위해 2차원 흐름모형인 Nays2DH를 이용하여 기존에 수행된 실험자료를 바탕으로 수치실험을 수행하여 모형을 비교검증하였다. 우선은 위어의 형태에 의한 불연속 흐름의 수치적 재현성에 대해서 고찰했으며 하도의 전처리를 통해 모의흐름을 보정하였다. 더 나아가, 수문갯수에 따른 월류흐름의 예측모의를 수행하여 결과를 비교하였다. 모의결과, 수문의 갯수가 증가할 경우 동일한 통수단면적에서 보 하류부의 최대유속이 증가할 수 있다는 것을 알 수 있었으며 이는 하상변동에도 영향을 줄 것으로 판단된다. 이러한 결과들을 통해, 본 연구는 추후의 보의 운영에 따른 흐름 및 유사이송 등을 고려하는 수리학적 연구의 기초자료를 제공할 수 있었다.

키워드
2차원 흐름 모형
하상변동
수치모의
보 운영
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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 : 7
  • No :3
  • Pages :218-226
  • Received Date : 2020-09-21
  • Revised Date : 2020-09-28
  • Accepted Date : 2020-09-28
  • DOI :https://doi.org/10.17820/eri.2020.7.3.218
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