인문학
사회과학
자연과학
공학
의약학
농수해양학
예술체육학
복합학
DBpia AI
AI 에이전트
AI 아이디어
AI 리더
AI 뷰어
Citeasy
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지원사업
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커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
피인용 0
초록·키워드
With the increasing use of azimuth thrusters in LNG bunkering vessels, concerns have arisen regarding the influence of duct side area variation on manoeuvring performance. In practice, simplified stock azimuth thruster models without geometric similarity are widely adopted in model tests, yet the resulting uncertainties in the assessed manoeuvrability remain unclear, and free-running model test results are often accepted without any validation procedure. In this study, free-running CFD simulations were performed using STAR-CCM+ by varying the duct side area from –5% to +15% relative to that of the original azimuth thruster. Because a one-to-one comparison of the time histories with the model test was not feasible, the CFD results were compared with the model test in terms of the zig-zag overshoot angles to examine the usefulness of the CFD approach. The results show that the duct side area significantly affects the manoeuvrability of the vessel: a smaller duct side area increased the overshoot angle, whereas a larger area generated greater lateral force during thruster vectoring, resulting in a faster yaw response and reduced overshoot angles by up to approximately 25.9%. These findings indicate that even small variations in duct side area can lead to noticeable differences in manoeuvrability, and that free-running CFD analysis can serve as a useful tool for validating simplified stock azimuth thruster models.
본문·목차
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