Skin friction in marine vessels constitutes one of the major issues that have negative environmental and financial impact due to the increased energy consumption. In this paper, the combination of two skin friction reduction techniques of superhydrophobic coating and microbubble lubrication are investigated experimentally. Microbubbles of up to 20 [μm] are introduced in the boundary layer through microbubble generators attached on the stem of a 2.52 [m] long ship treated with a superhydrophobic nano-ceramic coating. Resistance measurements are conducted at various towing speeds and trim angles and a skin friction coefficient reduction of up to 2.15% is noted.

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