Impeller of centrifugal compressor, centrifugal compressor including the impeller, and method for producing the impeller

A method for producing an impeller of a centrifugal compressor,

• the impeller including a plurality of blades each of which has a leading edge, a trailing edge, a pressure surface and a suction surface extending between the leading edge and the trailing edge, and a shroud-side end and a hub-side end defining the pressure surface and the suction surface together with the leading edge and the trailing edge,
• the method comprising a step of forming each of the plurality of blades,
• wherein the step of forming each of the plurality of blades includes:
• a step of line cutting the pressure surface and the suction surface such that a blade element connecting the shroud-side end and the hub-side end is linear;
• and
• a step of forming the trailing edge by removing a part of the blade, such that the trailing edge has a convex shape with respect to an imaginary straight line connecting the shroud-side end and the hub-side end in the trailing edge.