Model and Full Scale VLCC Resistance Prediction and Flow Field Analysis Based on IDDES Method

With the development of CFD technology and the improvement of computing capacity, CFD is playing an increasingly important role in ship design. However, at present CFD computations of ships are typically performed in model scale due to the lack of experimental results in full-scale, and the increasingly complexity of numerical simulation at very high Reynolds numbers that RANS is hard to solve. In this paper, a RANS/DES solver for naval architecture and ocean engineering named naoe-FOAM-SJTU, which is developed from OpenFOAM, is applied to carry out the numerically simulation of modeland full-scale VLCC. For model scale computation results, we adopt the three-dimensional extrapolation method to get full-scale resistance, and also full-scale calculation is carried out by CFD method at the cruise speed directly. Results are compared with the experimental results/three-dimensional extrapolation results. The effect of surface roughness is considered in full-scale computations. Analysis results show reliability and validity of our IDDES method in ship resistance prediction. This paper also made a discussion on comparison of flow fields of modeland full-scale VLCC.