Propulsion Prediction of Container RD542_0 with Vortex Fin Installed near Stern at Model Scale

• Main Authors: Jhih-Hong Fan, 范直宏
• Other Authors: Shiu-wu Chau
• Format: Others
• Language: zh-TW
• Published: 2008
• Online Access: http://ndltd.ncl.edu.tw/handle/30909815641457768667

碩士 === 中原大學 === 機械工程研究所 === 96 === Based on the double-model assumption, where the time-averaged continuity and Navier-Stokes equations are solved incorporated with k-w model by finite volume discretization with multi-block grid topology, the influence of vortex fin on the propulsion performance of container ship RD542_0 is studied at modle scale. For the purpose of designing a proper vortex fin to meet the energy-saving requirement, systematic calculations based on different geometrical parameter sets describing the surveyed vortex fins, such as location, orientation, size and number of vortex fins, are conducted to investigate the influences of vortex fin installment on the propulsion characteristics. The numerical results indicate that the increase of the angle of attack of vortex fin, resulting in induced flow flowing out of the propeller plane, where the rotational energy created by the vortex fin is not effectively absorbed by the propeller, leads to power increase at modle scale despite of the installment of vortex fin at starboard or both sides. In contrast, decreasing the angle of attack of vortex fin, resulting in induced flow flowing into the propeller plane, where the rotational energy created by the vortex fin can be effectively absorbed by the propeller, leads to possible power decrease at modle scale.