Centrifugal air propulsive unit for vehicle, has case with peripheral wall having inner side with axial extension zone, and turbine with vanes having outer edges, where outer edges and extension zone are homothetic in their major part

摘要

The unit has a turbine (1) with vanes (2) having axially concave outer edges. A case has a peripheral wall (5) with an inner side (4) having an axial extension zone (8) that is axially convex. The outer edges of the vanes and the axial extension zone of the inner side are homothetic in their major part. The axial curvature of the outer edges of the blades has a curved zone (11) placed at a distance (h2) from the base of the vanes.