| 摘要 |
The present invention relates to a duct for a vessel. An operator is capable of guiding the effective improvement of the propulsive performance of the propeller without special problems while easily avoiding various kinds of problems caused by cavitation (for example, a problem of a remarkable decrease in the propulsive performance of a propeller due to the bad influence of the cavitation, a problem of damage to a body, blades, and the like of the propeller due to a collision between the propeller and the cavitation, a problem of an increase in fluctuation pressure of the vessel due to the pressure waves caused by the collision between the propeller and the cavitation by additionally forming) <an auxiliary duct for rectifying a fluid flow capable of inducing a flow velocity increase and a pressure decrease by rectifying the fluid flow in the front side> of the upper part of a starboard of the duct for the vessel corresponding to the upper front part of the starboard of the propeller (namely, 0° to 90°, a first quadrant of rectangular coordinates), additionally forming <an air injecting unit capable of injecting predetermined air to the front side of the upper part of the propeller (namely, 0° to 90°, a first quadrant of rectangular coordinates) (for example, a configuration composed of an air injecting hole, an air flow line, an air storage box, an air injection control module, and the like)> to be connected to the auxiliary duct of rectifying the fluid, and additionally forming an air layer capable of preventing the formation of unnecessary cavitation in the front upper part of the starboard of the propeller and preventing pressure waves due to the cavitation in a corresponding region. The duct for the vessel includes a main duct and the auxiliary duct. |
