Kort nozzle

Abstract

A Kort nozzle, in particular a Kort nozzle configured rotatable around the rudder axis of a ship, wherein at least one opening is provided in the wall of the Kort nozzle, so that the occurence of recirculations or of swirls is avoided or reduced even with an angular position with respect to a longitudinal axis of the ship and a globally uniform flow pattern is adjusted as far as possible.

1 . In a Kort nozzle configured to be swivelable about a rudder axis of a ship, wherein the Kort nozzle comprises a ring duct consisting of one solid wall, said duct being conically tapered, and a bearing for swiveling the Kort nozzle about the rudder axis of a ship, wherein the wall of the duct has at least two openings which are disposed substantially opposite each other, wherein a a fixed ship's propeller is disposed in the Kort nozzle so that the Kort nozzle is also swivelable about the propeller, and wherein the at least two openings are both always unsealed and configured so that water flows simultaneously through said at least two openings from outside to the inside of the Kort nozzle. 
   
   
       2 . (canceled) 
   
   
       3 . The Kort nozzle according to  claim 1 , wherein the at least two openings are disposed in a central area with respect to a height of the Kort nozzle. 
   
   
       4 . The Kort nozzle according to  claim 3 , wherein the central area ranges from one third to two thirds of the height of the Kort nozzle. 
   
   
       5 . The Kort nozzle according to  claim 4 , wherein the central area ranges from two fifths to three fifths of the height of the Kort nozzle. 
   
   
       6 . The Kort nozzle according to  claim 3 , wherein at least two openings are disposed in each central area of the Kort nozzle, wherein the at least two openings of each central area are arranged in a longitudinal direction of the Kort nozzle one behind the other and/or in a vertical direction above one another. 
   
   
       7 . The Kort nozzle according to  claim 1 , wherein the at least two openings are each disposed with respect to a length of the Kort nozzle in an area from one third to two thirds of the length. 
   
   
       8 . The Kort nozzle according to  claim 1 , wherein the at least two openings are each disposed with respect to a length of the Kort nozzle in an area from two fifths to three fifths of the length. 
   
   
       9 . The Kort nozzle according to  claim 1 , wherein the at least two openings are each disposed with respect to a length of the Kort nozzle in an area in the middle of the length. 
   
   
       10 . (canceled) 
   
   
       11 . The Kort nozzle according to  claim 1 , wherein for a swiveling angle of 10°, 15° or 20° one of the at least two openings is disposed substantially adjacent to the propeller. 
   
   
       12 . The Kort nozzle according to  claim 1 , wherein the at least two openings are configured as an oblong slit extending in vertical direction. 
   
   
       13 . The Kort nozzle according to  claim 1 , wherein the at least two openings extend obliquely from the outside to the inside through the wall with respect to a main flow direction. 
   
   
       14 . The Kort nozzle according to  claim 13 , wherein the at least two openings extend at an angle of 10° to 60°, with respect to the longitudinal axis of the Kort nozzle. 
   
   
       15 . The Kort nozzle according to  claim 14 , wherein the at least two openings extend at an angle of 20° to 45°, with respect to the longitudinal axis of the Kort nozzle. 
   
   
       16 . The Kort nozzle according to  claim 14 , wherein the at least two openings extend at an angle of 30° to 35°, with respect to the longitudinal axis of the Kort nozzle. 
   
   
       17 . The Kort nozzle according to  claim 1 , wherein the at least two openings taper from the outer side of the wall to the inner side of the wall. 
   
   
       18 . The Kort nozzle according to  claim 1 , wherein the dimensions of the at least two openings are substantially constant over the whole extension thereof. 
   
   
       19 . The Kort nozzle according to  claim 1 , wherein admission edges and/or discharge edges of the at least two openings are rounded-off. 
   
   
       20 . Ship having a Kort nozzle according to  claim 1 .