Numéro : 2514 - Year : 2008
Virtual model tank, two application examples: numerical simulation of cavitations of a marine propeller, numerical simulation for manoeuvrability applications (contributions to VIRTUE European project)
Chantal Rigoux, Bassin d'Essais des Carènes - Val de Reuil (France)
Olivier Truttmann, Bassin d'Essais des Carènes - Val de Reuil (France)
Pierre-Emmanuel Guillerm, Bassin d'Essais des Carènes - Val de Reuil (France)
Aurélien Drouet, Bassin d'Essais des Carènes - Val de Reuil (France)
Erwan Jacquin., Bassin d'Essais des Carènes - Val de Reuil (France)
Bassin d’essais des carènes is involved in the European project VIRTUE (The Virtual Tank Utility in Europe) supported by the European Commission since 2005.
In the work-package dedicated to cavitation modelling, Bassin d’essais des carènes carried out numerical surveys on marine propeller, using the commercial software FLUENT. Cavitation study is required in many industrial and military projects at Bassin d’essais des carènes. For example, acoustic stealth imposes to delay cavitation inception on propellers. An overview of results for a propeller cavitating in open-water conditions is presented and demonstrates capabilities of the solver to deal with cavitating propeller for an industrial purpose. In the work-package dedicated to manoeuvrability simulations, Bassin d’essais des carènes developed and validated a Navier-Stokes with free surface solver (ICARE) for unsteady simulations of a manoeuvring vessel. For the simulations, viscous flow, non-linear free-surface elevations and non-linear coupling between the flow and the ship motions are taken into account. Due to Cpu-time and modelling complexity, a fully numerical simulation of a ship manoeuvre, able to replace system-based simulations or free-running tests, is not considered at the moment. However, fully numerical simulations can provide informations of practical interest for the understanding of the complex flow characteristics during critical manoeuvres. Results presented show that computations performed with the solver ICARE, reproduce the behaviours observed during static drift and circular motions experiments. Those computations are the first step toward the development of a Navier-Stokes tool for manoeuvring simulations. Further works will be dedicated to the validation of forces acting on the hull due to propeller and rudder.
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