Turbine intrusion loss reduction system

摘要

Systems and devices configured to reduce windage and mixing losses in a turbine by redirecting and/or aligning a direction of a leakage flow with the flowpath of the main flow of a turbine are disclosed. In one embodiment, a device includes: a base configured to connect to a diaphragm of a turbine; and a radial portion connected to the base and extending radially inboard from the base toward a rotor of the turbine, the radial portion oriented to adjust a direction of travel of a leakage flow of working fluid radially inboard at an angle complementary to a primary working fluid path of the turbine.

主权项

1. A turbine diaphragm system comprising:
an outer ring; a set of nozzles disposed circumferentially about an interior of the outer ring, the set of nozzles extending radially inboard; a member connected to an inner surface of the outer ring and extending circumferentially along the outer ring adjacent a portion of the set of nozzles, the member oriented to adjust a direction of a leakage flow of working fluid to a radially inboard direction at an angle complementary to a primary working fluid path; a first set of ridges extending from the member in an upstream direction relative to the member, each ridge in the first set of ridges circumferentially distanced from one another; and an inner ring radially inboard of the outer ring and connected to the set of nozzles, wherein the first set of ridges is disposed on an upstream facing surface of the member, the first set of ridges is oriented substantially radially and is distanced radially inboard from the outer ring.