Patent ID: 9163642
Filing Date: 2015-10-20
Classification: F04D

Abstract:
1. An impeller of a rotary machine, in which a direction of flow is configured to gradually change from an axial direction to a radial direction as the flow goes from an interior in the radial direction of a fluid flow passage to an exterior in the radial direction of the fluid flow passage, the impeller comprising: a hub surface defining at least a portion of the fluid flow passage; a blade surface defining at least a portion of the fluid flow passage; and a bulge disposed at a corner formed by the hub surface and the blade surface, the bulge being disposed at an acute angle with respect to both of the hub surface and the blade surface, the bulge being located at a rear half on an outlet side of the fluid flow passage, and the bulge being disposed so as to bulge toward the interior of the fluid flow passage from the corner.