한국해안·해양공학회논문집 (Journal of Korean Society of Coastal and Ocean Engineers)

  • 제31권6호
  • /
  • Pages.356-367
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  • 2019
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  • 1976-8192(pISSN)
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  • 2288-2227(eISSN)
한국해안·해양공학회 (Korean Society of Coastal and Ocean Engineers)
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2차원저천단구조물(LCS)의 주변에서 불규칙파동장의 변동특성

Variation Characteristics of Irregular Wave Fields around 2-Dimensional Low-Crested-Breakwater

  • 이광호 (가톨릭관동대학교 토목공학과) ;
  • 최군호 (한국해양대학교 대학원 토목환경공학과) ;
  • 이준형 (한국해양대학교 대학원 토목환경공학과) ;
  • 정욱진 (한국해양대학교 대학원 토목환경공학과) ;
  • 김도삼 (한국해양대학교 건설공학과)
  • Lee, Kwang-Ho (Dept. of Civil Eng., Catholic Kwandong University) ;
  • Choi, Goon Ho (Dept. of Civil and Environmental Eng., Graduate School, Korea Maritime and Ocean University) ;
  • Lee, Jun Hyeong (Dept. of Civil and Environmental Eng., Graduate School, Korea Maritime and Ocean University) ;
  • Jung, Uk Jin (Dept. of Civil and Environmental Eng., Graduate School, Korea Maritime and Ocean University) ;
  • Kim, Do-Sam (Dept. of Civil Eng., Korea Maritime and Ocean University)
  • 투고 : 2019.11.18
  • 심사 : 2019.11.27
  • 발행 : 2019.12.31
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초록

본 연구는 olaFlow 모델에 의한 혼상류수치해석법을 적용하여 저천단구조물에 의한 불규칙파랑의 변동특성을 수치적으로 검토한다. 목표스펙트럼에 의한 불규칙파형과 측정된 불규칙파형과의 비교 및 이로부터 산정된 두 주파수스펙트럼의 비교로부터 olaFlow의 타당성을 검증하고, 2차원저천단구조물에 의한 불규칙파의 주파수스펙트럼의 변동, 파전달율, Hrms의 공간분포, 평균유속과 평균난류운동에너지의 공간분포 등을 수치적으로 검토한다. 이로부터 LCS 외해측의 전면에서 시계방향의 해빈류와 반시계방향의 순환류셀이 형성되고, 내해측의 정수면 근방에서 항내로 향하는 강한 일방향흐름이 발생되는 등의 중요한 결과를 얻을 수 있었다.

This study evaluates the variation characteristics of irregular wave fields for two-dimensional Low-Crested Structure (LCS) by olaFlow model based on the two-phases flow by numerical analysis. The numerical results of olaFlow model are verified by comparing irregular wave profile of target wave spectrum and measured one, and their spectra. In addition, spacial variation of irregular wave spectrum, wave transmission ratio, root-mean square wave height, time-averaged velocity and time-averaged turbulent kinetic energy by two-dimensional LCS are discussed numerically. The time-averaged velocity, one of the most important numerical results is formed counterclockwise circulating cell and clockwise nearshore current on the front of LCS, and strong uni-directional flow directing onshore side around still water level.

키워드

참고문헌

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