Project Summary
Exploring the integration of a passive drag-reduction technique on Flettner rotor sails to enhance the aerodynamic efficiency of wind-assisted propulsion systems. The ultimate aim is to reduce vessel fuel consumption and, consequently, emissions by optimising both the surface pattern along the rotor and its configuration in terms of the shape and position relative to rotor height (i.e., near-ground region, transition zone, and upper free-stream region). Experimental studies will be carried out in the University of Strathclyde’s Fully Turbulent Flow Channel to assess the performance of different drag reduction techniques under varying flow conditions. The findings will inform high-fidelity numerical simulations aimed at quantifying the effectiveness of the concept. By examining the influence of surface pattern on flow separation, lift generation and drag reduction, the project seeks to deliver a proof-of-concept upgrade to wind-assisted propulsion systems. The outcome will be a validated solution for retrofitting or newbuilding applications, integrating a passive drag-reduction technique initially into rotor sails to extend their operational range and enhance efficiency, particularly under light-wind conditions where current systems are less effective. This innovation aligns with the UK’s Maritime Decarbonisation Strategy and directly supports Net Zero targets by improving wind energy capture, reducing reliance on main propulsion, and enabling sustainable vessel operations.
