Hydrodynamic Analysis of Propellers in Steady Flow Using a Surface Panel Method-2-Flow Field around Propeller〔付討論〕

概要

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Hydrodynamic modeling of trailing vortex wake of a propeller is one of the most important factors in developing a propeller theory. A variety of trailing vortex wake models have been proposed hitherto. However, details of geometrical features have not been known clearly. In the present study, fiow fields around propeller are precisely measured in a cavitation tunnel by use of a 3-component Laser Doppler Velocimeter (LDV). Based on the experimental finding that pitch of tip vortices is smaller than that of helical trailing vortex sheets, a new wake model of trailing vortices is proposed to improve the existing surface panel methods for hydrodynamic analysis of propeller. Then, the flow fields around propeller are calculated by using the improved surface panel method, and it is shown that the predicted flow fields around propeller are in good agreement with the measured ones.
社団法人日本船舶海洋工学会の論文