Numerically-based ducted propeller design using vortex lattice lifting line theory
Stubblefield, John M.
MetadataShow full item record
This thesis used vortex lattice lifting line theory to model an axisymmetrical-ducted propeller with no gap between the duct and the propeller. The theory required to model the duct and its interaction with the propeller were discussed and implemented in Open-source Propeller Design and Analysis Program (OpenProp). Two routines for determining the optimum circulation distribution were considered, and a method based on calculus of variations was selected. The results of this model were compared with the MIT Propeller Lifting Line Program (PLL) output for the purpose of validation. Ducted propellers are prevalent in modern marine propulsion systems, and the application of this technology continues to expand. The theory associated with ducted propellers applies to a wide range of devices which include azimuth thrusters, pumpjets, and tidal turbines. Regardless of the application, engineers need tools such as OpenProp to design these devices for their expected operating conditions. OpenProp is an open source MATLABÂ®-based suite of propeller numerical design tools. Previously, the program only designed open propellers. The code developed in this thesis extended OpenProp's capability to be able to design a propeller within an axisymmetrical duct.
CIVINS (Civilian Institutions) Thesis document
RightsThis publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.
Showing items related by title, author, creator and subject.
D'Epagnier, Kathryn Port. (Cambridge Massachusetts Institute of Technology and the Woods Hole Oceanographic Institution,, 2007-09);An open source, MATLAB (trademarked)-based propeller design code MPVL was improved to include rapid prototyping capabilities as well as other upgrades as part of this effort. The resulting code, OpenPVL is described in ...
Renick, Dirk Hampton. (Monterey California. Naval Postgraduate School, 1999-05);A propeller which operates in the shear flow found near the aft end of marine vehicles experiences an intimate coupling between the propeller's induced velocity field and the rotational inflow. The presence of the propeller's ...
Flood, Kevin M. (Monterey California. Naval Postgraduate School, 2009-06);Propellers are typically optimized to provide the maximum thrust for the minimum torque at a specific number of revolutions per minute (RPM) at a particular ship speed. This process allows ships to efficiently travel at ...