Naslov
The effect of trim on the total resistance of a container ship

Autori
Martić, Ivana ; Degiuli, Nastia ; Martić, Katarina ; Farkas, Andrea ; Grlj, Carlo Giorgio

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Book of Abstracts of 2nd Kotor International Maritime Conference / Ivošević, Špiro ; Dževerdanović Pejović, Milena ; Dlabač, Tatijana ; Đurović, Zorica ; Škurić, Maja - Kotor : University of Montenegro, Faculty of Maritime Studies Kotor, 2022, 64-64

ISBN
978-86-7664-226-7

Skup
2nd Kotor International Maritime Conference (KIMC 2022)

Mjesto i datum
Kotor, Crna Gora, 27.11.2022. - 30.11.2023

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
container ship ; resistance test ; trim ; Computational Fluid Dynamics ; Reynolds averaged Navier-Stokes equations, k-ω SST turbulence model

Sažetak
The shipping industry is responsible for the emission of approximately 940 million tonnes of CO2 annually, which is at least 2.5% of the world’s total CO2 emissions. New regulations encourage the shipping industry to take measures to increase the energy efficiency of ships to reduce greenhouse gas emissions. Therefore, the International Maritime Organization (IMO) has proposed several short, medium, and long-term measures for the shipping industry to reduce these emissions by 50% by 2050. Trim optimization is one of the simple short-term measures for achieving the fuel savings recommended by the IMO as it does not require any hull modification or marine engine upgrades. Traditionally, the ship hull is optimized for the design speed and draft. However, during its lifetime the ship sails at different speeds and drafts, and for certain combinations, a significant reduction in fuel consumption could be achieved. In this paper, numerical simulations of resistance test for a 6750–TEU container ship in full scale are carried out at different trim angles using Computational Fluid Dynamics (CFD). Numerical simulations are performed to determine the optimal trim with the lowest value of the total resistance. A verification study is performed for grid density and time step to determine the total numerical uncertainty. Furthermore, the obtained results of the numerical simulations are validated against the extrapolated results of the model tests. The flow around the ship hull, shear stress distribution on the wetted surface, wave patterns, and hydrodynamic pressure distribution are analysed for different trim angles. Finally, the recommendation for the optimal trim at the design speed is given.

Izvorni jezik
Engleski

Znanstvena područja
Brodogradnja

POVEZANOST RADA