Ship's stem duct with airfoil section

Details Ship's stem duct with airfoil section Ship's stem duct with airfoil section

1995-03-20

1996-10-22

Basinger, Sherman

Ships

Displacement-type hull

114 67R, B63B 132

Patent

active

055666345

ABSTRACT:
A stem duct of a ship used to achieve the reduction of the ship's propulsion wave height and the improvement in the laminarity of the flow around the ship's bow, so that the ship is able to move with an increased speed and/or with reduced fuel consumption. The duct is mounted on each side of the bow frontal surface and has an airfoil section fitted, arranged in the direction of the flow, with its leading edge at the duct inlet and its trailing edge at the duct outlet. Following mounting of the duct, a passage is created for the flow, between the duct's interior surface, consisting of the convex airfoil surface, and the ship's bow surface. The flow passing through the passage acquires an increased speed and a reduced pressure, thereby leading to an improved slip of the ship.

REFERENCES:
patent: 1258554 (1918-03-01), Furness
patent: 1859139 (1932-05-01), Hanlon
patent: 2139594 (1938-12-01), Kort
patent: 2649266 (1953-08-01), Darrieus
patent: 2767678 (1956-10-01), Vertens
patent: 3302603 (1967-02-01), Eckert
patent: 5046444 (1991-09-01), Vorus

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