Experimental Quantification of Drag Change of Commercial Coatings Under the Effect of Surface Roughness and Soft Fouling
Paper in proceedings, 2018
The paper describes a campaign of rotary disk tests intended to quantify the drag change due to physical and biological roughness present on commercial coatings. As first campaign test, disks coated with biocidal and non-biocidal coatings with relatively smooth and coarse roughness finishes are tested. This gives an insight into drag characteristics of coatings in their clean or unexposed to soft fouling (e.g. algae fouling) conditions. Further, these mentioned disks with different coating types and roughness ranges are exposed to fouling growth, with the main aim to explore the effect of algae fouling on drag change and examine the extend of fouling on each disks.
The results of the study may be useful to estimate added drag and overall fuel penalties for ships having various coating roughness ranges and soft fouling. Moreover, as part of the study, shear forces required to remove algal fouling from different coating types and roughness ranges will be suggested.
Hull performance monitoring