A generalised hybrid RANSE/BEM approach for unsteady flow effects in hull/propeller interaction

Autor: Calcagni D., Capone A., Ortolani F., Broglia R., Dubbioso G., Pereira F., Salvatore F., Di Felice F.
Jazyk: angličtina
Rok vydání: 2019
Předmět:
Zdroj: Sixth International Symposium on Marine Propulsors-smp'19, Rome, 26-30/05/2019
info:cnr-pdr/source/autori:Calcagni D.; Capone A.; Ortolani F.; Broglia R.;Dubbioso G.; Pereira F.; Salvatore F.; Di Felice F./congresso_nome:Sixth International Symposium on Marine Propulsors-smp'19/congresso_luogo:Rome/congresso_data:26-30%2F05%2F2019/anno:2019/pagina_da:/pagina_a:/intervallo_pagine
Popis: The hydrodynamics of a ship in prescribed motionis addressed by unsteady simulations using a hybridRANS/BEM solver. The interactive methodology com-bines a viscous-flow model addressing the flow aroundthe ship with a potential-flow model describing the loadsinduced by the vorticity generated at the propeller. Animplicit iterative procedure is provided in the time cy-cle through a body-force/effective inflow approach. Thepresent model is validated through comparisons about thevelocity flow-field and blade loads of numerical predictionsand measurements collected during an experimental cam-paign of a ship model in calm water moving in straightahead and steady drift motion. In particular, the nomi-nal tridimensional flow at the propeller disc is providedby the application of a stereo PIV technique, based on theuse of boroscopic equipment, whereas the transient singleblade loads are collected using a novel set-up adopting a 6-component multi-axial force transducer constrained at theroot blade itself. In spite of the inability of the model to ac-count for the blade boundary layer, the flow-field descrip-tion is detailed enough outside the propeller region whileassuring a limited computational burden related to meshgeneration. The present methodology represents a viablesolution to address the flow of maneouvring ships.
Databáze: OpenAIRE
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