한국전산유체공학회:학술대회논문집
- 2005.10a
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- Pages.305-310
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- 2005
CALCULATION OF HYDRODYNAMIC CHARACTERISTICS FOR SHIP'S PROPULSION MECHANISM OF WEIS-FOGH TYPE
Weis-Fogh형 선박추진기구의 유체역학적 특성계산
Abstract
The velocity and pressure fields of a ship's propulsion mechanism of the Weis-Fogh type, in which a airfoil moves reciprocally in a channel, are studied in this paper using the advanced vortex method. The airfoil and the channel are approximated by a finite number of source and vortex panels, and the free vortices are introduced from the body surfaces. The viscous diffusion of fluid is represented using the core-spreading model to the discrete vortices. The velocity is calculated on the basis of the generalized Biot-Savart low and the pressure field is calculated from integrating the equation given by the instantaneous velocity and vorticity fields. Two-dimensional unsteady viscose flows of this propulsion mechanism are numerically clarified, and the calculated results agree well with the experimental ones.
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