Patent ID: 8128356
Filing Date: 2012-03-06
Classification: F01D,F02B,F02C,F05D,Y02T

Abstract:
1. A mixed flow turbine comprising: mixed flow turbine moving blades having inlet-side edges located at an upstream side is formed in a convex shape toward the upstream side; and a scroll that is a space formed upstream of the mixed flow turbine moving blades by a casing having a shroud that covers the radially external edges of the mixed flow turbine moving blades, the space being for supplying working fluid toward the inlet-side edges of the mixed flow turbine moving blades, wherein the scroll is separated by a scroll partition wall into a shroud-side space and a hub-side space; and wherein a shroud-side partition wall surface and a hub-side partition wall surface at the rear edge side of the scroll partition wall form a shroud-side inlet channel in which the working fluid flows substantially radially and a hub-side inlet channel in which the working fluid flows substantially in the same direction as the inclination direction of a hub circumferential surface at the inlet of the mixed flow turbine moving blades between the partition wall surfaces and portions facing the partition wall surfaces, respectively, wherein the hub-side inlet channel is provided with a hub-side blade-shaped nozzle whose blade surfaces are formed substantially parallel to a rotation axis.