| 摘要 |
The present invention relates to a pre-swirl stator for a ship which has an asymmetric wavy profile to minimize generation of flow resistance and vortex and remarkably reduce vortex induced vibration (VIV) and vortex induced noise (VIN), as well as minimizing the loss of kinetic energy in a rotation direction of propeller slip stream by homogenizing the flow going to the propeller. The pre-swirl stators are radially installed in front of the propeller at a stern of a hull to give straightness to the vortex generated from the rear of the propeller. A front end of the stator has a profile of a wavy form which is alternately provided with valleys and ridges. The region extending from the valley to the ridges protruding from both sides of the valley is in an asymmetric form, so that the flow of the seawater is converged with different speed boundary layers on the basis of the valley. |
