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

  • 제29권3호
  • /
  • Pages.117-124
  • /
  • 1992
  • /
  • 1225-1143(pISSN)
  • /
  • 2287-7355(eISSN)
대한조선학회 (The Society of Naval Architects of Korea)
권호 표지

비대선수 주위의 Sub-Breaking Wave 탐지기법

Detection of Sub-Breaking Waves around a Blunt Bow

  • Myung-Soo Shin (Korea Research Institute of Ships and Ocean Engineering) ;
  • Young-Gill Lee (Korea Research Institute of Ships and Ocean Engineering) ;
  • Eun-Chan Kim (Korea Research Institute of Ships and Ocean Engineering) ;
  • Seung-Il Yang (Korea Research Institute of Ships and Ocean Engineering)
  • 발행 : 1992.08.01
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초록

시리즈 60과 실제 선형주위의 파도를 MAC(Marker And Cell) 법에 의해 격자간격이 변화하는 Staggered좌표계에서 계산하였다. 지배방정식으로는 오일러(Euler) 방정식을 채택하였다. 계산된 파고는 계측된 파고와 잘 일치하고 있어 MAC 법이 유효함을 보여주고 있다. 한편, 비점성 불안정성 해석에 의해 유도된 Sub-breaking파 출현의 임계조건이 비대선수주위의 계산된 결과에 적용되었다. 이 유도된 임계조건이 Sub-breaking파의 출현을 잘 탐지하는 것을 확인하였다.

Waves around a practical hull form and a series 60 model are computed by rectangular variable spacing and staggered flesh systems based on MAC(Marker and Cell) method. As a governing equation, the Euler equation is adopted. The comparison indicates that the computed waves are in good agreement with the measured results and that the MAC method is useful. On the other hand, a critical condition for the appearance of sub-breaking waves derived from the in viscid instability analysis is applied to the calculated flow field around a blunt bow. It is confirmed that the derived condition detects well the appearance of sub-breaking waves.

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