Effect of ship hull form on the resistance penalty from biofouling
Artikel i vetenskaplig tidskrift, 2018

Hull biofouling is a well-known problem for the shipping industry, leading to increased resistance and fuel consumption. Considering that the effects of hull form on resistance are known to be higher for a less slender hull, it is hypothesised in this paper that the effect of biofouling roughness on resistance is also dependent on the hull form. To test this hypothesis, previously reported full-scale numerical results on a containership are re-analysed. Form effects on roughness penalties, corresponding to KΔCT = 0.058 ± 0.025, are observed at a low speed (19 knots, Res = 2.29 × 109), which are however cancelled out by traditionally neglected roughness effects on wave-making resistance at a higher speed (24 knots, Res = 2.89 × 109). It is concluded that hull form effects on biofouling penalties can be significant at low speeds, though not generalisable for higher speeds, namely when wave-making resistance corresponds to ≥ 29% of total resistance.

frictional resistance

roughness

Turbulent boundary layer

hull form factor

ship resistance

Författare

Dinis Oliveira

Chalmers, Mekanik och maritima vetenskaper, Maritima studier, Maritim miljövetenskap

Ann I. Larsson

Göteborgs universitet

Lena Granhag

Chalmers, Mekanik och maritima vetenskaper, Maritima studier, Maritim miljövetenskap

Biofouling

0892-7014 (ISSN) 1029-2454 (eISSN)

Vol. 34 3 262-272

Styrkeområden

Transport

Ämneskategorier

Annan teknik

DOI

10.1080/08927014.2018.1434157