Open AccessDynamic manoeuvres of KCS in waves using URANS computations with overset grids
Author(s) -
Yuting Jin,
Allan Magee,
Lucas J. Yiew,
Yiying Zheng
Publication year - 2019
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1357/1/012015
Subject(s) - propeller , ship motions , rudder , trajectory , computation , marine engineering , benchmark (surveying) , mechanics , simulation , geology , physics , engineering , computer science , hull , geodesy , algorithm , astronomy
This paper presents a CFD URANS approach to model self-propelled free running maneouvres for autonomous or remote-controlled surface vessels in calm water and Stokes waves. The object of study in this paper is a benchmark container ship KCS. A hierarchy of overset grids are utilised, allowing active rudder motions while the vessel is undertaking 6 DoF turning circle and zig-zag manoeuvres. Body force propeller model (BFM) is adopted to drive the vessel at a constant approaching speed corresponds to Fr=0.26. Verification and validation study is performed for estimating the numerical uncertainties within the computations. In calm water, the computed vessel trajectories and velocities are compared against experimental data from literature and mathematical model (MM) based simulation results. Differences between URANS and experimental data are around 10.0%. After introducing waves, the manoeuvring behaviour of the vessel changes due to the presence of wave frequency loads and drift loads. The wave frequency loads exert fluctuations on measurements such as velocity, yaw rate, vessel encounted loads and etc., while the drift loads result in shift in the vessel’s trajectory especially for the turning circle manoeuvre.