Haase, M; Binns, JR; Bose, N; Davidson, G; Thomas, G; Friezer, S; (2015) Hydrodynamic Hull Form Design Space Exploration of Large Medium-Speed Catamarans Using Full-Scale CFD. International Journal of Maritime Engineering , 157 (A3) pp. 161-173. 10.3940/rina.ijme.2015.a3.331.

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Abstract

Large medium-speed catamarans are a new class of vessel currently under development as fuel-efficient ferries for sustainable fast sea transportation. Appropriate data to derive design guidelines for such vessels are not available and therefore a wide range of demihull slenderness ratios were studied to investigate the design space for fuel-efficient operation. Computational fluid dynamics for viscous free-surface flow simulations were utilised to investigate resistance properties of different catamaran configurations having a similar deadweight at light displacement, but with lengths ranging from 110 m to 190 m. The simulations were conducted at full-scale Reynolds numbers (log(Re) = 8.9 ­ 9.6) and Froude numbers ranged from Fr = 0.25 to 0.49. Hulls of 130 m and below had high transport efficiency below 26 knots and in light loading conditions while hulls of 150 m and 170 m showed benefits for heavier displacement cases and speeds up to 35 knots. Furthermore, the study concluded that the lowest drag was achieved with demi-hull slenderness ratios between 11 and 13.

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