| dc.description.abstract | The designed propellers with extinguishing structures of hub and winglets show great potential in saving energy by providing the strong thrust with a rotating speed. The dynamic performances are relying on the combination of geometries characteristics. This project is based on a cooperation with Nodin Innovation since August 2015 to study different propeller hubs and winglets through FEM modelling.
Hub structures in convex, concave, dome, and dome coping with a small Center propeller located on the front of the hub are tested with a rotating speed under the RPM of 100 rev/min in manipulation under the standard k - e turbulence model. The shear stress transport turbulence model is carried out to study the potential dynamic properties of four propellers (the Convex propeller, the Dome propeller, the Center propeller, and the Winglet propeller) under the RPM less than 3000 rev/min. The mass flow through the inlet, interfaces, and the outlet is applied to determine the stability of the fluid flow. The present study shows a relative mass flow of each propeller compared with the Convex propeller which is chosen to be the reference model in this dissertation.
Through CFD simulations in ANSYS CFX, we evaluate the dynamic performances of the designed propellers. Some tables and figures containing the most important parameters, and the expecting future work are given to open up a specific avenue for improving the analysis process for the simulations. | nb_NO |
