公开(公告)号：US12247580B2

公开(公告)日：2025-03-11

申请号：US18142745

申请日：2023-05-03

Applicant: General Electric Company

Inventor： Vaishnav Raghuvaran ,  Bhaskar Nanda Mondal ,  Thomas Ory Moniz ,  Atanu Saha ,  Vaibhav Deshmukh ,  Curtis Walton Stover ,  Andrew Mark Del Donno

IPC: F04D29/54 ,  F01D11/00 ,  F02K3/06 ,  F04D19/02 ,  F04D29/08

Abstract: Structures for reducing forward loads in compressors are described. A compressor includes inner and outer circumferential support structures positioned concentrically around a central axis, and an aft-most stage including a vane extending radially inward from the outer circumferential support structure. An axial length of the aft-most stage is defined by a spacer arm of the inner circumferential support structure. The vane includes a root, a tip, and a trailing edge extending between the root and the tip. A ratio of a first radial distance between a first point located at an intersection of the tip of the vane and the trailing edge to a radially inner wall of the spacer arm of the inner circumferential support structure to a second radial distance between the first point and a second point located at an intersection of the root of the vane and the trailing edge is between 0.95 and 4.5.

公开(公告)号：US20230407101A1

公开(公告)日：2023-12-21

申请号：US18085935

申请日：2022-12-21

Applicant: General Electric Company

Inventor： Mohandas Nayak ,  Sundeep Kumar ,  Atanu Saha ,  Julie Marie Kuhn

IPC: C09D1/00 ,  C09D133/08 ,  C09D179/08 ,  C08K3/105

CPC classification number: C09D1/00 ,  C09D133/08 ,  C23C4/11 ,  C08K3/105 ,  C09D179/08

Abstract: A coating method is provided. The coating method includes applying, via electrophoretic deposition or slurry deposition, an overcoat composition on an outer surface of a thermal barrier coating system on a substrate. The overcoat composition includes a coating material comprising a plurality of particles having a particle size of less than 1000 nm. The method includes sintering the overcoat composition in the presence of one or more sintering aids to form an overcoat layer having a surface roughness of less than 1 micrometer.

公开(公告)号：US11828226B2

公开(公告)日：2023-11-28

申请号：US17827180

申请日：2022-05-27

Applicant: General Electric Company

Inventor： Sesha Subramanian ,  Ravikanth Avancha ,  Atanu Saha

IPC: F02C6/08 ,  F02C9/18

CPC classification number: F02C6/08 ,  F02C9/18

Abstract: In one aspect, the present disclosure is directed a gas turbine engine including a compressor, a combustor, and a turbine in a serial flow arrangement. The compressor includes a casing having an inner wall and an outer wall. The inner wall defines a passageway for airflow through the compressor. The casing defines a bleed cavity between the inner wall and the outer wall. The inner wall has an opening. The casing defining a channel between the opening and the bleed cavity to direct airflow into the bleed cavity. The channel is defined by a first wall and a second wall of the casing. The second wall being downstream of the first wall. A surface of the first wall has a pattern to reduce flow separation in the channel.

公开(公告)号：US20230332539A1

公开(公告)日：2023-10-19

申请号：US17827180

申请日：2022-05-27

Applicant: General Electric Company

Inventor： Sesha Subramanian ,  Ravikanth Avancha ,  Atanu Saha

IPC: F02C9/18 ,  F02C7/00

CPC classification number: F02C9/18 ,  F02C7/00 ,  F05D2240/127

Abstract: In one aspect, the present disclosure is directed a gas turbine engine including a compressor, a combustor, and a turbine in a serial flow arrangement. The compressor includes a casing having an inner wall and an outer wall. The inner wall defines a passageway for airflow through the compressor. The casing defines a bleed cavity between the inner wall and the outer wall. The inner wall has an opening. The casing defining a channel between the opening and the bleed cavity to direct airflow into the bleed cavity. The channel is defined by a first wall and a second wall of the casing. The second wall being downstream of the first wall. A surface of the first wall has a pattern to reduce flow separation in the channel.

公开(公告)号：US20230323835A1

公开(公告)日：2023-10-12

申请号：US17838603

申请日：2022-06-13

Applicant: General Electric Company

Inventor： Rajesh Kumar ,  Prateek Jalan ,  Kudum Shinde ,  Atanu Saha ,  Hiranya Kumar Nath ,  Ravindra Shankar Ganiger

IPC: F02K3/02 ,  F02C7/12

CPC classification number: F02K3/02 ,  F05D2260/20 ,  F02C7/12

Abstract: A gas turbine engine includes a casing, a rotor assembly rotatably mounted within the casing, the rotor assembly comprising a forward rotor portion defining a forward rotor cavity and an aft rotor portion defining an aft rotor cavity, the aft rotor cavity being fluidly isolated from the forward rotor cavity, and a cooling system. The cooling system includes a forward cooling fluid supply, a forward supply line providing fluid communication between the forward cooling fluid supply and the forward rotor cavity, an aft cooling fluid supply, an aft supply line providing fluid communication between the aft cooling fluid supply and the aft rotor cavity, and a flow control system fluidly coupled to the forward supply line and the aft supply line for regulating a flow of forward cooling fluid and a flow of aft cooling fluid.

公开(公告)号：US20230312935A1

公开(公告)日：2023-10-05

申请号：US17841861

申请日：2022-06-16

Applicant: General Electric Company

Inventor： Atanu Saha ,  Bernard Patrick Bewlay ,  Neelesh Nandkumar Sarawate

IPC: C09D1/00 ,  C04B35/63 ,  C04B35/488 ,  C04B35/505

CPC classification number: C09D1/00 ,  C04B35/6316 ,  C04B35/488 ,  C04B35/505 ,  C04B2235/3246 ,  C04B2235/3225 ,  C04B2235/5436

Abstract: Coated components, along with methods of their formation, are provided. The coating may include a component having a surface and a coating over the surface of the component. The coating may include a first plurality of coarse micrograins having an coarse median grain size of greater than 10 μm to 20 μm, a second plurality of medium micrograins having a medium median grain size of 4 μm to 10 μm, a third plurality of fine micrograins having a fine median grain size of 0.001 μm to less than 4 μm. Each of the coarse micrograins, medium micrograins, and fine micrograins may include, independently, a yttria-stabilized zirconia (YSZ) constituent having a chemical formula of (ZrO2)(1−x)(Y2O3)x with x is from greater than 0 to less than 1.

公开(公告)号：US11655720B2

公开(公告)日：2023-05-23

申请号：US17313538

申请日：2021-05-06

Applicant: General Electric Company

Inventor： Hrishikesh Keshavan ,  Atanu Saha ,  Margeaux Wallace ,  Mamatha Nagesh ,  Ambarish Jayant Kulkarni ,  Bernard Patrick Bewlay, Jr.

IPC: F01D5/28 ,  F01D5/00 ,  B05D5/00 ,  B05D7/24

CPC classification number: F01D5/288 ,  B05D5/005 ,  B05D7/24 ,  F01D5/005 ,  F05D2220/32 ,  F05D2230/31 ,  F05D2230/80 ,  F05D2230/90 ,  F05D2240/35 ,  F05D2260/231 ,  F05D2300/611 ,  F05D2300/701

Abstract: A sprayable thermal barrier coating powder mixture for a gas turbine engine includes: a dry composition having a low surface area ceramic powder having a median particle size distribution greater than 5 microns and less than 50 microns, and a high surface area ceramic powder having a median particle size distribution smaller than 5 microns, wherein the low surface area ceramic powder makes up at least 50% by weight of the dry composition of the sprayable thermal barrier coating powder mixture.

公开(公告)号：US11549382B2

公开(公告)日：2023-01-10

申请号：US17089331

申请日：2020-11-04

Applicant: General Electric Company

Inventor： Hrishikesh Keshavan ,  Ambarish Jayant Kulkarni ,  Margeaux Wallace ,  Byron Andrew Pritchard, Jr. ,  Almed M. Elkady ,  Atanu Saha ,  Mamatha Nagesh ,  Bernard Patrick Bewlay

IPC: F01D5/28 ,  C23C4/11 ,  C23C4/02 ,  C23C4/134

Abstract: A coated component of a gas turbine engine includes a substrate defining a surface, a thermal barrier coating deposited on the surface of the substrate, a region of the component where the thermal barrier coating has spalled from the substrate, a layer of environmental contaminant compositions formed on one or more of the thermal barrier coating or the region of the component where the thermal barrier coating has spalled from the substrate in response to an initial exposure of the component to high operating temperatures of the gas turbine engine, and a thermal barrier coating (TBC) restoration coating deposited at least on the region of the component where there thermal barrier coating has spalled from the substrate.

公开(公告)号：US10822687B2

公开(公告)日：2020-11-03

申请号：US15431805

申请日：2017-02-14

Applicant: General Electric Company

Inventor： Atanu Saha ,  Nicholas Edward Antolino ,  Don Mark Lipkin

IPC: C04B35/505 ,  C23C12/00 ,  C23C8/62 ,  C04B41/89 ,  C04B41/00 ,  C04B41/52 ,  F01D5/28 ,  C04B35/50 ,  C23C30/00

Abstract: Methods of forming an environmental barrier coating are disclosed. A method includes disposing a powder-based coating on a substrate, heat-treating the powder-based coating at a temperature greater than 800° C. and less than 1200° C. to form a porous coating that includes surface-connected pores, infiltrating at least some of the surface-connected pores of the porous coating with an infiltrant material to form an infiltrated coating, and sintering the infiltrated coating at a temperature greater than 1200° C. and less than 1500° C. to form the environmental barrier coating on the substrate.

公开(公告)号：US10384978B2

公开(公告)日：2019-08-20

申请号：US15243005

申请日：2016-08-22

Applicant: GENERAL ELECTRIC COMPANY

Inventor： Kevin Paul McEvoy ,  James Ruud ,  Lawrence E. Szala ,  Susan Corah ,  Atanu Saha ,  Hrishikesh Keshavan

IPC: C04B35/48 ,  F01D5/28 ,  C23C4/134 ,  C04B35/622 ,  C04B35/64 ,  C23C14/22 ,  C04B41/87 ,  C04B41/00 ,  C04B41/50 ,  C23C28/00 ,  F01D5/00 ,  C23C4/11

Abstract: The present invention is directed to repair compositions for thermal barrier coatings and methods of use thereof. The repair compositions include a ceramic composition, a colloidal solution, an aqueous binder, an aqueous dispersant, and an aqueous ammonia solution. The ceramic composition includes a first population of yttria-stabilized zirconia particles having a mean diameter from about 250 nm to about 1000 nm, a second population of yttria-stabilized zirconia particles having a mean diameter from about 2 μm to about 10 μm, and a third population of yttria-stabilized zirconia particles having a mean diameter from about 20 μm to about 250 μm. One method includes depositing the repair layer onto the damaged region, the repair layer including the repair composition, and heat treating the repair layer.