Matching Flettner rotors with diesel engines and controllable pitch propellers

Code for the preliminary sizing of a ship propulsion plant based on a diesel engine, a controllable pitch propeller, and one or more Flettner rotors. The mathematical model describing the behaviour of the rotor in terms of propulsive thrust and power is presented in the publications. The rotor model has been integrated into an existing diesel propulsion model in order to evaluate the ship's fuel consumption. The ship's propulsion model is written in a parametric form with respect to the following design parameters: ship dimensions and resistance-speed curve, propeller diameter, engine power, rotor geometry, and true wind conditions. The methodology helps in evaluating the engine-propeller working points and eventually the total ship propulsive power, including the power required to spin the rotor.