Abstract

The dynamic properties of a ship's propulsion mechanism of Weis-Fogh type are studied by the discrete vortex method. The wing in the channel is approximated by a finite number of bound vortices and free vortices representing the separated flow are introduced from the trailing edge of the wing. The time histories of the thrust, the drag, and the moment acting on the wing are calculated, including the unsteady force due to the change of strength of the bound vortices. These calculated results show a similar tendency to the experimental ones qualitatively and the dynamic properties of this propulsion mechanism are numerically clarified.

Keywords

• Hydraulic Machine;
• Numerical Analysis;
• Unsteady Flow;
• Separation;
• Fluid Force;
• Discrete Vortex Method;
• Ship Propulsion

• 유체기계;
• 수치해석;
• 비정상류;
• 박리;
• 유체력;
• 이산와법;
• 선박추진;