Flume experiments for studying the effects of submergence on three-dimensional flow structure around a spur dike

Jiyong Lee; Jeongsook Jeon; Youngkyu Kim; Seokkoo Kang

doi:10.3741/JKWRA.2018.51.2.109

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2018 Vol.51, Issue 2 Preview Page Next Page

Flume experiments for studying the effects of submergence on three-dimensional flow structure around a spur dike 수제의 잠김 정도에 따른 3차원 흐름 구조 변화에 관한 실험 연구

28 February 2018. pp. 109-120

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Abstract

In this study, we conducted flume experiments to investigate the three-dimensional flow structures around a half-submerged spur dike in a straight open channel flume. The experiments were carried out under the two different Froude numbers, 0.10 and 0.18. The results were compared with the previous experimental result conducted for non-submerged spur dike. Three-dimensional instantaneous velocities were measured using Acoustic Doppler Velocimetry (ADV) and water elevation data were collected using ultra sonic distance sensor. The results show that submergence conditions of the spur dike largely influence the three-dimensional flow structures around a spur dike.

Keywords

Spur dike

Open channel

Three-dimensional flow

Secondary flow

ADV

본 연구에서는 직선 개수로 내 설치된 50% 잠긴 수제 모형 주위에서 발생하는 3차원 흐름 현상 연구를 위한 수리모형실험이 수행되었다. 수리모형실험은 두 가지 Froude 수(Fr0.10와 Fr0.18)에서 수행되었다. 그리고 본 실험 결과를 잠기지 않은 수제 실험결과(Jeon and Kang, 2016)와 비교하여 수제의 잠김 흐름 발생에 따른 흐름 변화를 관찰하였다. 시간평균유속과 난류에너지를 구하기 위해 초음파 유속계를 이용해 3차원 실시간 유속을 측정하였고 시간평균 수위를 측정하기 위해 초음파 거리 센서를 이용해 실시간 수위를 측정하였다. 수제의 잠김 흐름 발생은 3차원 유속분포에 큰 영향을 미치는 것으로 나타났다.

키워드

수제

개수로

3차원 흐름

이차류

초음파 유속계

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Information

Publisher :KOREA WATER RESOURECES ASSOCIATION
Publisher(Ko) :한국수자원학회
Journal Title :Journal of Korea Water Resources Association
Journal Title(Ko) :한국수자원학회 논문집
Volume : 51
No :2
Pages :109-120
Received Date : 2017-10-19
Revised Date : 2017-11-17
Accepted Date : 2017-11-24
DOI :https://doi.org/10.3741/JKWRA.2018.51.2.109

Journal of Korea Water Resources Association ISSN:2799-8746(Print) 2799-8754(Online) 한국수자원학회 논문집

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