Global ETD Search
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Showing 1 to 7 of 7 for “"Ducted propeller"”.
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A comparison of experiment and analysis for a ducted propeller
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Ocean Engineering, 1990.
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Numerically-based ducted propeller design using vortex lattice lifting line theory
… 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 …
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Parametric and Wake Study of a Ducted Propeller Using The Variational Multi-Scale Method
… used to generate a high-fidelity simulation of a ducted propeller in a 3D unsteady incompressible Navier-Stokes turbulent flow. The blades were incorporated as moving surfaces via an arbitrary Lagrangian-Eulerian treatment of such equations. The domain features surfaces such as struts, ducts and …
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Design of Supplementary Thrusting Unit for a Miniature Autonomous Submarine
… designs. The first was a retractable rimdriven propeller design which was found to be too power inefficient for implementation. The final design was an azimuthing ducted propeller capable of vectoring thrust 360 degrees. Two body sections containing an implementation of the ducted propeller …
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Dynamic performance of small diameter tunnel thrusters.
… on positioning Remotely Operated Vehicles with a ducted propeller had shown that lags in the thruster response caused limit cycling in the vehicle's behavior. These experiments have shown that the influence of the fluid inertia in the tunnel is significant and changes the lagging response to a …
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Aerodynamic study of a small, ducted VTOL aerial vehicle
… Aerial Vehicle (PUAV) is a 9-inch diameter ducted vertical takeoff and landing reconnaissance vehicle with the capability of fast-forward cruise flight. Currently in the development stage, the program is envisaged to yield a man-portable craft that a foot soldier can use to provide …
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An improved panel method for the prediction of performance of ducted propellers
… dimensional problems of flow around ducts and ducted propellers. One significant development of this method is the application of full wake alignment scheme in which the trailing vortex wake sheets of the blades are aligned with the local flow velocity by also considering the effects of duct …