Zobrazeno 1 - 10
of 83
pro vyhledávání: '"STEFANO Gaggero"'
Publikováno v:
Journal of Marine Science and Engineering, Vol 12, Iss 11, p 2090 (2024)
The design of the stator and nozzle of a rim-driven pumpjet thruster (RDPJ) is addressed through a simulation-based design optimization approach built on a parametric description of the main geometrical characteristics of the system, a RANS solver wi
Externí odkaz:
https://doaj.org/article/ee5365653b94400a997cfb87b482e906
Publikováno v:
Journal of Marine Science and Engineering, Vol 11, Iss 12, p 2325 (2023)
During the early design stage of an underwater vehicle, the correct assessment of its manoeuvrability is a crucial task. Conducting experimental tests still has high costs, especially when dealing with small vehicles characterized by low available bu
Externí odkaz:
https://doaj.org/article/d595106a3c6948d388e8d2fb8563e17c
Autor:
Stefano Gaggero
Publikováno v:
Journal of Marine Science and Engineering, Vol 11, Iss 9, p 1659 (2023)
In the current paper, high-fidelity improved delayed detached-eddy simulations (IDDES) using the OpenFOAM library are employed to characterize the performances and the wake dynamics of RIM-driven thrusters. Despite their relatively old conception, th
Externí odkaz:
https://doaj.org/article/3d76b86eeb4444d8b9af4d3817a99faf
Pre-Swirl Ducts, Pre-Swirl Fins and Wake-Equalizing Ducts for the DTC Hull: Design and Scale Effects
Publikováno v:
Journal of Marine Science and Engineering, Vol 11, Iss 5, p 1032 (2023)
A pre-swirl fin (PSF), pre-swirl duct (PSD) and wake-equalizing duct (WED) energy-saving devices (ESD) are designed for the Duisburg Test Case (DTC). To this aim, a simulation-based design optimization method, combining RANSE analyses (ship resistanc
Externí odkaz:
https://doaj.org/article/1de80f1e9a4b44db9374e06b616e2dc2
Autor:
Stefano Gaggero, Marco Ferrando
Publikováno v:
Journal of Marine Science and Engineering, Vol 11, Iss 1, p 112 (2023)
Tip loading is a common strategy to increase the propulsive efficiency of propellers. Solutions such as contracted and tip-loaded (CLT) and “New generation” CLT propellers exploit the presence of an endplate (“true” or as the result of a dedi
Externí odkaz:
https://doaj.org/article/c659b6e925594346b98cad2f919c70e7
Publikováno v:
Journal of Marine Science and Engineering, Vol 9, Iss 10, p 1107 (2021)
A method for the morphing of surface/volume meshes suitable to be used in hydrodynamic shape optimization is proposed. Built in the OpenFOAM environment, it relies on a Laplace equation that propagates the modifications of the surface boundaries, rea
Externí odkaz:
https://doaj.org/article/40b80ad00c964235b1bf95249ba3997d
Publikováno v:
Journal of Marine Science and Engineering, Vol 8, Iss 4, p 257 (2020)
Ducted propellers are unconventional systems that are usually adopted for ship propulsion. These devices have recently been studied with medium-fidelity computational fluid dynamics code (based on the potential flow hypothesis) with promising results
Externí odkaz:
https://doaj.org/article/905c99c0ddb443ae9bd194e798027e53
Publikováno v:
International Journal of Rotating Machinery, Vol 2012 (2012)
In the present paper an experimental and numerical analysis of an unconventional CLT propeller is carried out. Two different numerical approaches, a potential panel method and an RANSE solver, are employed. Cavitation tunnel experiments are carried o
Externí odkaz:
https://doaj.org/article/6bda40e7d1e14de8a6b9bcdbaa01223f
Publikováno v:
International Journal of Rotating Machinery, Vol 2012 (2012)
Ducted propellers, in decelerating duct configuration, may represent a possible solution for the designer to reduce cavitation and its side effects, that is, induced pressures and radiated noise; however, their design still presents challenges, due t
Externí odkaz:
https://doaj.org/article/d53505c61fe54497872506ad93e48cd2
Autor:
Stefano Gaggero, Mattia Martinelli
Publikováno v:
Journal of Ocean Engineering and Marine Energy. 9:69-91
Pre-swirl fins-based energy saving devices (ESDs) have been designed to improve the propulsive performances of twin-screw ships. To this aim, a combined BEM/RANSE method for efficient self-propulsion prediction is required. The approach is included i
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::49ec8264b3e8e6f7fd57bd76e5bd59a4
https://doi.org/10.1007/s40722-022-00251-0
https://doi.org/10.1007/s40722-022-00251-0