| Autor: |
Oliveira D; a Department of Mechanics and Maritime Sciences , Chalmers University of Technology , Gothenburg , Sweden., Larsson AI; b Department of Marine Sciences , University of Gothenburg , Tjärnö - Strömstad , Sweden., Granhag L; a Department of Mechanics and Maritime Sciences , Chalmers University of Technology , Gothenburg , Sweden. |
| Jazyk: |
angličtina |
| Zdroj: |
Biofouling [Biofouling] 2018 Mar; Vol. 34 (3), pp. 262-272. Date of Electronic Publication: 2018 Feb 19. |
| DOI: |
10.1080/08927014.2018.1434157 |
| Abstrakt: |
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 K ΔCT = 0.058 ± 0.025, are observed at a low speed (19 knots, Re s = 2.29 × 10 9 ), which are however cancelled out by traditionally neglected roughness effects on wave-making resistance at a higher speed (24 knots, Re s = 2.89 × 10 9 ). 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. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
|
