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Master Thesis: “The bow wave development on high-speed craft"

Internship
The bow wave developing on vessels sailing at speed depends on a large number of factors: vessel speed, bow shape, running attitude among the others. Ships are designed to develop the smallest possible bow wave, in order to reduce resistance. At high speed in the planing regime of fast craft (Fr > 0.9) the bow wave have a significant influence on the running attitude of the vessel, the wave field around the hull and the overall sailing performance.
The prediction of the bow wave elevation on high speed craft by means of numerical computations is therefore of paramount importance to correctly estimate the running performance of these vessels, both in calm water and in waves. The most common mathematical tools employed in the simulation of high-speed craft behaviour at sea often cannot cope with the complexity of this aspect.

Semi-empirical, strip theory or panel methods are commonly used in the prediction of high-speed craft performance [1-3]. However, such tools need empirical correction to predict the bow wave elevation reliably. This research will investigate the bow wave elevation for different hull entry parameters (deadrise angle, forward speed and pitch), with the final aim to construct a semi-empirical formulation for the wave shape from the bow and along the hull. CFD simulations and MARIN experimental results will aid the development of the research.
 
References
[1] Savitsky, D. Hydrodynamic Design of Planing Hulls, Marine Technology (1964)
[2] Keuning, A. J. Non-linear behaviour of fast monohulls in head waves, Ph.D. thesis, Delft University of Technology, (1994) https://repository.tudelft.nl/.
[3] De Jong, P. Seakeeping behaviour of high speed ships – An experimental and numerical study, Ph.D. thesis, Delft University of technology, (2011) https://repository.tudelft.nl/.
 
Duration
The internship is for the duration of 9 months. The start date of the internship period can be determined in consultation with the supervisors.
 
The profile

  • Master student in Naval Architecture.
  • Interest in CFD and hydrodynamics.

 
Department and supervisor
During the internship you will be connected with the department R&D and Ships of MARIN. The supervisor for this internship, Dr Matteo Bonci, is working as Project Manager at the Ships Department.
 
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