Abstract: Assembly comprising a body extending around a central axis, the body having an outer surface from which a plurality of blades extend, each of said blades having a blade root and a blade tip, defining an inner radial end and an outer radial end of the blade relative to the central axis, said blades having the same blade height measured radially relative to the central axis, characterized in that each of the blades is connected to the body by its blade root via a connection having a nonzero connection height, so that for the plurality of said blades, the connection height of two successive blades is different.

Abstract: A centrifugal impeller having an axis of rotation extending from front to rear, and including a body extending around the axis of rotation, the body having a front portion and a rear portion of larger section than the front portion, the impeller also have blades projecting from a front face of the body, the body presenting a setback in its front face between two consecutive blades, which setback is situated at a circumferential distance from the two blades.

Abstract: A centrifugal impeller (18) having an axis of rotation (X) extending from front to rear, and comprising a body (20) extending around the axis of rotation (X), the body (20) having a front portion and a rear portion of larger section than the front portion, the impeller also have blades (24, 25) projecting from a front face (20a) of the body (20), the body (20) presenting a setback (30) in its front face (20a) between two consecutive blades (24, 25), which setback (30) is situated at a circumferential distance from said two blades (24, 25).