RINA Presentation: Ship performance prediction in waves using high- fidelity and practical tools

It is critical to be able to estimate a ship’s response to waves, since the resulting added resistance and loss of speed may cause delays or course alterations, with consequent financial repercussions. The resistance of a ship operating in a seaway is greater than its resistance in calm water. The difference between these two resistances arises from ship motions and wave forces in waves and has been termed the added resistance due to waves.

Added resistance can account for up to 15-30% of the total resistance in calm water. It is therefore very necessary to be able to accurately predict the added resistance of a ship in waves, and this should be included in ship performance assessments. There are many techniques to calculate the performance and behaviour of a ship in seaways. This talk will include a summary of these methods available for naval architects, focusing on their advantages and shortcomings.

The application of the state-of-the-art Computational Fluid Dynamics (CFD) method in the prediction of seakeeping and added resistance in waves will also be introduced. Some practical methods for quick estimation of these quantities will be discussed. The presentation will also cover the future directions in research in this context.

Dr Tahsin Tezdogan is currently a senior lecturer in Fluid-Structure Interactions in the Department of Naval Architecture, Ocean and Marine Engineering (NAOME) at the University of Strathclyde, Glasgow. He is also the Director of Postgraduate Taught Programmes within NAOME. Dr Tezdogan received his PhD degree in 2015 from Strathclyde from the same department, with his PhD thesis entitled, ‘Potential Flow and CFD-Based Hydrodynamic Analyses of Mono- and Multi-Hull Vessels’.