Computer fluid dynamics (CFD) study of new innovative backflow marine propeller

There were many solutions to increase the marine propellers efficiency, like Propeller Boss Cap Fins, Tip Fins, Surface Piercing Propellers, Pre and Post-Swirl Devices, Ducted Propulsors etc. All of them are supposing sometimes intricate devices involving high implementation costs and/or maintenance. The present paper is proposing a new innovative Backflow Propeller where the core element is the backflow shield (or screen) which is inbuilt in the phase of fabrication stage of the propeller claiming zero mainenance costs. As demonstrated via Ansys CFX the suction pressure on the blade back is increased 8 times which is easying the rotation of the propeller with the added benefit of the turning component of the backflow jet. The downside of this innovative solution would be the increased thickness of the blade and the opposing component of the backflow jet, both affecting negativelly the eficiency. What is missing here is the experimental validation. This is because any experimental research is to be conducted in dedicated laboratory with proper instrumentation. Therefore the Author is kindly inviting the researchers of interest to develop the experimental studies required and to come with the final figure of the efficiency improvment factor of the proposed solution. Please bear in mind that the invention is protected by a Patent according to the International laws.