Journal of the Society of Naval Architects of Korea (대한조선학회논문집)

The Society of Naval Architects of Korea (대한조선학회)
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Experimental Study on Hydrodynamic Characteristics of Dam Break Flow for Estimation of Green Water Loading

청수현상 추정을 위한 댐 붕괴 흐름의 유체동역학적 특성에 관한 실험적 연구

  • Hyung Joon Kim (Department of Naval Architecture and Ocean Engineering, Pusan National University) ;
  • Jong Mu Kim (Department of Naval Architecture and Ocean Engineering, Pusan National University) ;
  • Jae Hong Kim (Department of Naval Architecture and Ocean Engineering, Pusan National University) ;
  • Kwang Hyo Jung (Department of Naval Architecture and Ocean Engineering, Pusan National University) ;
  • Gang Nam Lee (Department of Naval Architecture and Ocean Engineering, Pusan National University)
  • 김형준 (부산대학교 조선해양공학과) ;
  • 김종무 (부산대학교 조선해양공학과) ;
  • 김재홍 (부산대학교 조선해양공학과) ;
  • 정광효 (부산대학교 조선해양공학과) ;
  • 이강남 (부산대학교 조선해양공학과)
  • Received : 2022.12.21
  • Accepted : 2023.03.17
  • Published : 2023.04.20
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Abstract

In this study, hydrodynamic characteristics of dam break flow were investigated by a series of experiments. The experiments were performed in a 2-D rectangular flume with obtaining instantaneous images of dam break flow to capture the free surface elevation, and pressure distributions on vertical wall and bottom of the flume. The initial water depth of the dam break flow was changed into 3 different heights, and the gate opening speed was changed during the experiments to study the effect of the gate speed in the dam break flow. Generation of dam break phenomena could be classified into three stages, i.e., very initial, relatively stable, and wall impact stages. The wall impact stage could be separated into 4 generation phases of wall impinge, run-up, overturning, and touchdown phases based on the deformation of the free surface. The free surface elevation were investigated with various initial water depth and compared with the analytic solutions by Ritter (1892). The pressures acting on the vertical wall and bottom were provided for the whole period of dam break flow varying the initial water depth and gate open speed. The measurement results of the dam break flow was compared with the hydrodynamic characteristics of green water phenomena, and it showed that the dam break flow could overestimate the green water loading based on the estimation suggested by Buchner (2002).

Keywords

Acknowledgement

본 연구는 산업통상부의 재원으로 추진 중인 '친환경수소선박 R&D플랫폼구축(No. 20006636)' 및 '미래 해양플랜트 글로벌 전문인력양성사업(P0012646)', 그리고 교육부의 재원으로 한국연구재단의 지원을 받아 수행된 기초연구사업임(2021R1I1A1A01059563).

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