Bilge keel with porous leading edge

摘要

A bilge keel design for improved ship roll damping performance. The bilge keel has a porous region substantially at a forward end, and is designed to alleviate and mitigate added drag from flow misalignment due to scale effects and variation in vessel speed and loading conditions. The bilge keel design is use on both port and starboard sides of the vessel hull.

主权项

1. A ship with enhanced roll stabilization that accommodates for changing conditions comprising:
a hull having;
a bow end,a stern end,a port side, anda starboard side, a waterline region along the hull representing a region of possible waterlines on the hull; first and second bilge keels mounted along the hull within or below the waterline region, wherein the first bilge keel is positioned on the port side of the hull, and the second bilge keel is positioned on the starboard side of the hull, wherein each of the first and the second bilge keels comprise:
an elongated plate comprising;
an attachment end attached to the hull;a free end;a forward end having a leading edge, the forward end attached at the bow end of the hull, the forward end extending laterally from the attachment end to the free end; anda trailing end having a rear edge, the trailing end attached towards the rear of the hull, the trailing end extending laterally from the attachment end to the free end, wherein the elongated plate comprises a porous portion extending laterally from the attachment end to the free end, said porous portion substantially at the forward end, and wherein the remainder of the elongated plate in a direction extending from said porous portion towards the rear edge is non-porous.