Centrifugal impeller for a compressor

Abstract

A centrifugal impeller for a compressor, through which a fluid is to pass. The impeller includes blades each having a leading edge and a trailing edge, the rotation of the impeller sucking fluid in through the front of the impeller, the fluid leaving the impeller via its outer periphery, the trailing edges of the blades being such that in a radial section plane intersecting the trailing edges of the blades, they are curved in the direction opposite to the direction of rotation of the impeller, and the trailing edge portions of the blades are redirected in the direction of rotation of the impeller to form respective end fins serving to deflect the flow of the fluid by redirecting it radially.

1 - 9 . (canceled) 
     
     
         10 . A centrifugal impeller for a compressor through which a fluid can pass, the impeller presenting an axis of rotation, a front portion of small section, and a rear portion of large section, the impeller comprising:
 blades each having a leading edge and a trailing edge, rotation of the impeller sucking fluid in through the front of the impeller, an axial speed of the fluid passing through the impeller being transformed progressively into radial speed, the fluid leaving the impeller at its outer periphery, at the trailing edges of the blades,   wherein in a radial section plane intersecting the trailing edges of the blades, the blades are curved in the direction opposite to the direction of rotation of the impeller, wherein, in the radial section plane, a trailing edge portion of the blades is redirected in the direction of rotation of the impeller in such a manner that it forms an end fin such that the flow of fluid is deflected by being radially redirected, and   wherein the end fin extends from the trailing edge of the blades over a length that, measured along the outer edge of the blades, represents more than 2% and less than 10% of the total length of the outer edge.   
     
     
         11 . The centrifugal impeller of  claim 10 , wherein, in the radial section plane, the end fin forms an obtuse angle that is greater than or equal to 155° and strictly less than 180°, with the blade portion situated immediately upstream from the end fin. 
     
     
         12 . The centrifugal impeller of  claim 10 , the impeller having main blades and intermediate blades situated between the main blades and axially shorter than the main blades, wherein the main blades and/or the intermediate blades present the end fins. 
     
     
         13 . The centrifugal impeller of  claim 12 , wherein the main blades present the end fins. 
     
     
         14 . The centrifugal impeller of  claim 12 , wherein the intermediate blades present the end fins. 
     
     
         15 . A compressor comprising a centrifugal impeller according to  claim 10 . 
     
     
         16 . A turbomachine comprising a compressor according to  claim 15 .