Static vane assembly for an axial flow turbine
AssigneeALSTOM Technology Ltd
InventorsBenjamin Megerle, Ivan William McBean, Timothy Stephen Rice, Said Havakechian
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Abstract
An axial flow turbine is described having a casing defining a flow path for a working fluid therein, a rotor co-axial to the casing, a plurality of stages, each including a stationary row of vanes circumferentially mounted on the casing a rotating row blades, circumferentially mounted on the rotor, with within a stage n vanes have an extension such that at least a part of the trailing edge of each of the n vanes reaches into the annular space defined by the trailing edges of the remaining N-n vanes and the leading edges of rotating blades of the same stage.
Claims4
An axial flow turbine comprising:
- a casing defining a flow path for a working fluid therein;
- a rotor co-axial to the casing;
- a plurality of stages, each comprising:
- a row of N stationary vanes circumferentially mounted on the casing;
- and
- a row of rotating blades circumferentially mounted on the rotor,
- wherein within a stage, n vanes have an extension such that at least a part of the trailing edge of each of the n vanes reaches into the annular space limited by the rotor and the casing and the trailing edges of the remaining N-n vanes and the leading edges of rotating blades of the same stage,
- wherein the number n of extended vanes is larger than zero but less than half the total number N of vanes in the stage, and
- the extension is limited to the first ⅔ of the radial height of a vane.
Dependencies are inferred from the claim text.