Investigation of the Use of Riblets on a Container Ship Propeller

The maritime industry faces increasing environmental regulations aimed at reducing CO2 emissions, driven by both international and regional bodies. The International Maritime Organization (IMO) has set ambitious targets to reduce greenhouse gas (GHG) emissions, aiming for a 40% reduction by 2030 and a 70% reduction by 2050 compared to 2008 levels [1]. This study explores the potential of utilizing riblet technology on ship propellers to enhance efficiency (already proven 2% with foil riblets) and reduce fuel consumption. Given the turbulent boundary layer around propellers operating at high Reynolds numbers, riblets can significantly decrease drag. Such improvements promise substantial economic and environmental benefits, especially for ships in continuous operation. Emerging laser technology offers a promising solution for applying riblets to the complex, curved surfaces of propellers. This paper outlines the potential benefits and future research directions for riblet technology in maritime applications.

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