Journal of The School of Marine Science and Technology,Vol.2 No.3
An Application of CFD to Ship Flow Field and Resistance Evaluation
─1st Report:Wave Pattern Analysis and Wave Resistance─
Fumie HARA, Akihito HIRAYAMA and Hikaru YAGI
Abstract
For more than ten years, CFD (Computational Fluid Dynamics) has been utilized as powerful tools in ship
design，especially for the evaluation of hull resistance and propulsive performance. It has been contributing to
shorten the lead time for obtaining the detail information of the flow around ship and also to minimize a number of
model tests.At present,it is generally understood that such calculation gives a lot of useful hydrodynamic data and
information but that minimum number of model tests are still required in the final stage of hull form development
in view of the definitive quantity of hull resistance.
As such calculation methods are used in daily design works,it is also necessary to clarify the correlation between
the calculation results and the traditional series model test data on top of improvement of calculation tools.
In this study, a PC-base CFD system are developed adopting some general purpose computer softwares and a
validation is made on a typical hull form of Series 60 focusing wave patterns and wave making resistance. The
calculated results indicated that wave profile on the hull showed a reasonable agreement with model tests at high and
low Froude’s numbers. The calculated wave pattern around the ship also showed good agreement.With respect to
the wave making resistance, the results indicated that the resistance coefficient curves can give a good agreement
with the model tests in magnitude and the location of hump and hollow. Conclusively, the system is promising for
practical application in terms of computation time,qualitative trend and quantitative wave-making resistance value.