an Azimuth Stern Drive Escort Tug. This study is devoted to identifying a proper mathematical model to be included in a dynamic manoeuvring simulator. The hydrodynamic problem is therefore decomposed in the hull and skeg components. The hydrodynamic characteristics of the skeg were so explored by varying its span and chord systematically, allowing deep insight into the physics of both components and their mutual interaction. The distribution of the forces acting on hull and skeg were studied in detail in their dependence from the skeg geometrical characteristics. Suitable mathematical formulations for the skeg forces were implemented in an MMG-like manoeuvring model-based onto the CFD captive simulations. Lastly, the impact on the tug’s manoeuvrability of the previously mentioned variations was then investigated. Turning, Zig-Zag, Escort Capability, Escort Mirror ability and Escort Stability manoeuvres were simulated. The results of these manoeuvres are presented, showing the great potential of this manoeuvring model in representing a wider class of Escort tugs.

Numerical analysis of escort tug manoeuvrability characteristics – Part II: The skeg effect

Piaggio, Benedetto;Villa, Diego;Viviani, Michele;Figari, Massimo
2020

Abstract

an Azimuth Stern Drive Escort Tug. This study is devoted to identifying a proper mathematical model to be included in a dynamic manoeuvring simulator. The hydrodynamic problem is therefore decomposed in the hull and skeg components. The hydrodynamic characteristics of the skeg were so explored by varying its span and chord systematically, allowing deep insight into the physics of both components and their mutual interaction. The distribution of the forces acting on hull and skeg were studied in detail in their dependence from the skeg geometrical characteristics. Suitable mathematical formulations for the skeg forces were implemented in an MMG-like manoeuvring model-based onto the CFD captive simulations. Lastly, the impact on the tug’s manoeuvrability of the previously mentioned variations was then investigated. Turning, Zig-Zag, Escort Capability, Escort Mirror ability and Escort Stability manoeuvres were simulated. The results of these manoeuvres are presented, showing the great potential of this manoeuvring model in representing a wider class of Escort tugs.
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11567/1011303
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 6
  • ???jsp.display-item.citation.isi??? 3
social impact