Abstract

This Master Thesis is focused on the estimation the hydrodynamic coefficients for Underwater Autonomous Vehicle (AUV) by means of CFD code. First a state of art of AUVs development is presented. Second, the sizing process for AUVs is studied. The main decissions on the design of this type of vehicles is showed. Third, hydrodynamic coeffcients required to solid rigid movement of AUV is presented. Fourth, an estimation of these coefficient is carried out using different formulation. Fifth, coefficient for REMUS 100 AUV are estimated using CFD code Tdyn. Then a comparison with experimental results obtained for others authors is showed. Finllay, some interesting conclusions and futher reseach are outlined.

Abstract

This degree thesis deals with the estimation of towing tank resistance of fishing vessel with round bilge. First, a state of art of fishing vessel is presented. Second, the usual statistical methods to predict the towing tank resistance of fishing vessel are analyzed. Third, a typical fishing vessel with round bilge is designed. Some parameters of designed fishing vessel are analysed. Fourth, the statistical method are applied to fishing vessel. The results are compared. Fifth, a towing tank analysis with CFD code Tdyn is carried out. The results of CFD and other numerical mentod are compared. Finally some conclusions are presented.

Abstract

This Master thesis is focussed in the verification of the capabilities of SeaFEM - FAST tool to carry out the fully coupled analysis of offshore wind turbines. First, a state of art of fully coupled analysis is presented. Then, rules to clasify and to certificate offshore wind turbines is studied. Design load conditions for OC3- Hywind NREL 5 MW Baseline are computed.