Ship with stern equipped with a device for deflecting a flow of water

Abstract

The device comprises a plurality of deflector members (1) having a submerged lower face (2), called first face, generally fitting into the extension of the hull bottom (FC) of the ship, toward the rear thereof, while forming an angle (alpha) in relation to a general plane (delta) tangent to this bottom (FC), characterized by the fact that these deflector members (1) are articulated to the hull and are juxtaposed side by side, over all, or practically all, the width of the stern, control means (4) making it possible to cause it to pivot in one direction or the other in order to vary said angle (alpha), these means being housed in part in a protective case.

Description

technical field [0001] The invention relates to boats, the stern of which is equipped with a flow deflection device. [0002] More specifically, it relates to ships of large size and high tonnage, such as cruise ships, whose speed of movement is relatively limited compared to that of a caravan, which is, for reference, between 10 and 25 knots (knot) Sometimes between about 18 and 45km / h cruising speed, and its Froude (Froude) number is 0.28. Background technique [0003] The hulls of ships of this type are known to be equipped with wedge-shaped deflector members arranged below the waterline in the region of connection of the underside of the hull with the rear side or bow of the ship. [0004] The function of this type of deflector, often named using the term "trim wedge", is to deflect the flow of water passing under the hull downward and aft at the stern in relative motion, which results in an increase or associated reduce the fuel consumption necessary for propulsion at...

AI Technical Summary

Problems solved by technology

[0011] But this type of hull arrangement is not suitable for large size and high tonnage ships, which will not lower (squat)

Moreover, it is not possible to make it avoid the recirculation of the waves at the rear of the ship, which causes a loss of ship propulsion energy (by increasing friction and disrupting the water flow near the blades of the propulsion device)

[0012] Also, since the surge from the rear is free to drive into the stern overhang ( counter), so this type of floating body cannot solve the problem of rear impact (slamming)

Images