파라미터 변화에 따른 석션버켓기초에 발생하는 세굴현상에 대한 수치해석 연구

• Published in: Han-guk haeyang gonghak hoeji (Online) Vol. 31; no. 4; pp. 281 - 287
• Main Authors: 박선호(Sunho Park), 송성진(Seongjin Song), 왕해청(Haiqing Wang), 정태환(Taehwan Joung), 신윤섭(Yunsup Shin)
• Format: Journal Article
• Language: Korean
• Published: 한국해양공학회 2017
• Subjects: 해양공학; Monopile 모노파일; Scour 세굴; Computational fluid dynamics(CFD) 전산유체역학; Stick-up 석션버켓 돌출 높이; Suction bucket 석션버켓; OpenFOAM 오픈폼
• ISSN: 1225-0767; 2287-6715
• DOI: 10.26748/KSOE.2017.08.31.4.281

In the case of fixed offshore wind turbines, scouring phenomena have been reported around sub-structures as a result of currents, which seriously damage the structural stability. A parametric study of the various sub-structures of a fixed offshore wind turbine was performed to investigate their effects on the scouring phenomena. For a suction bucket foundation and monopile, the effects of the stick-up heights and water depth were studied, respectively. The open source libraries, called OpenFOAM, were used to simulate a violent flow around a foundation. The numerical methods were selected based on a two-dimensional analysis of a suction bucket. Based on the results for various stick-up heights, a larger scouring region was observed with an increase in the stick-up height because of the down-wash flow around a foundation. Based on the results for various monopile water depths, the water depth had an insignificant effect on the scouring.