Dear Colleagues,                

Marine propulsion is a major issue of ship performance, both in calm water and in waves. Nowadays, attempts to improve ship efficiency, even by a few percent, are underway and, in this respect, all components affecting it are subjected to a detailed review and optimization. Propulsion, in combination with resistance, seakeeping and manoeuvring aspects are the major items on which researchers as well as ship designers and shipbuilders focus. Modern propulsion systems compete with the conventional ones, which still dominate the market, while Energy Saving Devices (ESD) are proposed to improve the efficiency of the propulsion unit or its interaction with the hull. Potential flow Boundary Element Methods (BEM), viscous flow solvers (Navier-Stokes equation solvers) and hybrid are included among the numerical methods currently proposed to cope with the aforementioned problems. Traditional and innovative experimental procedures in towing tanks and cavitation tunnels are used to validate the numerical results and to investigate in depth the mechanics, the behaviour and the actual efficiency of the proposed propulsion systems and ESDs. Propulsion systems of high-speed craft including airborne units, dynamic positioning systems and extrapolation procedures from model to full-scale are of interest to the hydrodynamic community. Control systems which may regulate or support the operation of the propulsion system, as well any side-effect, e.g., stabilization of dynamic responses, are welcome to be reported in this Special Issue.

The aim of this Special Issue should contain recent findings in the field of propulsion and dynamic positioning (where applicable) of ships, offshore structures, Remote Operating Vehicles (ROVs) and submarines. Relevant technologies enhancing prototyping, numerical or experimental simulation of the aforementioned systems as well as any available full-scale results are also desired. Researchers involved in the propulsion, dynamic positioning and ESDs should find this particular issue extraordinary and provide the latest perspectives on the state-of-the-art.

Topics of interest include (but are not limited to) the following areas:

• Hydrodynamic modelling of propulsion systems
• Potential flow methods to evaluate propulsion systems
• Viscous flow methods to assess propulsive performance
• Experimental techniques to evaluate open water and self-propulsion performance of propulsors
• Systematic results for series of propulsion units
• Dynamic positioning systems
• Submarine propulsion units
• Design and optimization of propulsion systems

Prof. Gregory Grigoropoulos
Guest Editor

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• propulsion system
• dynamic positioning system
• Energy Saving Device (ESV)
• cavitation
• numerical methods
• model tests
• full-scale trials
• stabilizing dynamic responses
• systematic series