There are a lot of different energy saving devices (ESD) on the market, e.g. pre-swirl fins, ducts (Schneekluth, Mewis), and post-swirl devices (costa bulbs, rudder fins and hub fins). The suppliers promise efficiency rates, which lie within achieved rates of former projects and the spread is often relatively high, e.g. savings of “2 up to 6%”. For ship owners it is difficult to decide, which device is the best solution for their particular ship design.
Using a RANSE code with a coupled 6-DOF solver, we provide numerical analyses of loads acting on floating structures.
If you need a reliable nominal wake field for the design of your propeller, we provide CFD wake field analysis in model and/or full-scale.