Passive control of gas turbine clearances using ceramic matrix composites inserts
a technology of ceramic matrix and inserts, which is applied in the direction of machines/engines, climate sustainability, sustainable transportation, etc., can solve the problems of difficulty in matching rotor/stator deflections and clearance openings
Pending Publication Date: 2022-11-03
GENERAL ELECTRIC CO
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- Abstract
- Description
- Claims
- Application Information
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Benefits of technology
The solution effectively reduces rotor / stator clearances, minimizes parasitic leakage, and improves fuel efficiency by inhibiting thermal growth of stator components, thereby enhancing the overall performance of the gas turbine engine.
Problems solved by technology
During operation, the large differences in the thermal and mechanical growth of the rotating and stator components make it difficult to match rotor / stator deflections.
Transient mismatch also results in clearance opening during takeoff acceleration.
Method used
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[0036]Reference now will be made in detail to embodiments provided, one or more examples of which are illustrated in the drawings. Each example is provided by way of explanation, not limitation of the disclosed embodiments. In fact, it will be apparent to those skilled in the art that various modifications and variations can be made in the present embodiments without departing from the scope or spirit of the disclosure. For instance, features illustrated or described as part of one embodiment can be used with another embodiment to still yield further embodiments. Thus it is intended that the present invention covers such modifications and variations as come within the scope of the appended claims and their equivalents.
[0037]Referring to FIGS. 1-21, various embodiments of a gas turbine engine are depicted having a passive clearance control ring. The control ring inhibits thermal growth of itself and adjacent stator hardware to preclude increased spacing between a stator component and...
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Abstract
A passive clearance control limits thermal expansion between stator components relative to rotor components. A control ring controls clearance in a passive manner and is located on or adjacent to stationary components which thermally expand during engine operation. The control ring is formed of material having low coefficient of thermal expansion such as CMCs (Ceramic Matrix Composites) and therefore limits, inhibits or restrains expansion of the adjacent stator components as temperatures increase. Limiting expansion of the stator component reduces rotor / stator clearances and limits parasitic leakage of fluid along the flow path through the engine core.
Description
CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application claims priority to and is a divisional application of Ser. No. 16 / 667,071 filed on Oct. 29, 2019, which is a divisional of Ser. No. 14 / 897,823 filed on Dec. 11, 2015 (now abandoned), which is a National Stage Entry of Serial Number PCT / US2014 / 040792 filed on Jun. 4, 2014, which claims priority from a provisional application of Ser. No. 61 / 833,544 filed on Jun. 11, 2013. Priority to all of these applications is claimed, and all of these applications are incorporated herein by reference in their entirety for all purposes.BACKGROUND[0002]Present embodiments relate generally to a gas turbine engine. More specifically, the present embodiments relate, but are not limited, to clearance control structures for stator components disposed opposite or at radially outward areas on rotating portions of the gas turbine engine.[0003]A typical gas turbine engine generally possesses a forward end and an aft end with its several core or pro...
Claims
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IPC IPC(8): F01D11/18F01D11/02F01D25/00
CPCF01D11/18F01D11/025F01D25/005F05D2240/11F05D2240/55F05D2260/30F05D2300/6033F05D2300/5021Y02T50/60
Inventor MONDAL, BHASKAR NANDARAHAIM, JOHN JOSEPHMONIZ, THOMASROSS, STEVEN A.KIRK, JOELHUNTER, SCOTTFUSINATO, DANIEL
Owner GENERAL ELECTRIC CO