JET ENGINE VARIABLE AREA TURBINE NOZZLE

Assignee

GENERAL ELECTRIC COMPANY A NEW YORK CORPORATION

Filed

Oct 28, 1991

Granted

Nov 4, 1997

Location

WEST CHESTER OH US

Abstract

A turbine nozzle for a gas turbine engine subassembly having an axial turbine. The turbine nozzle airfoil-shaped vanes are fixedly attached to one or both of the annular inner and outer casings. Apparatus is provided to vary the vane airflow passage area between the casings and between the pressure side of one vane and the suction side of an adjacent vane. The apparatus varies the area near at least the pressure side of the one vane. Various embodiments of the apparatus include: a small pivotable flap pivotally attached to the outer casing and positioned near the pressure side of the one vane; a small movable flap attached to the outer casing to be movable along the pressure side of the one vane, and a plug member insertable into and withdrawable from the vane airflow passage through the outer casing near at least the pressure side of the one vane.

Source: Google Patents