Patents by Inventor Ramakrishna Venkata Mallina
Ramakrishna Venkata Mallina has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20240117768Abstract: A rotary component for a gas turbine engine includes a plurality of rotor blades operably coupled to a rotating shaft extending along the central axis and an outer casing arranged exterior to the plurality of rotor blades in a radial direction of the gas turbine engine. The outer casing defines a gap between a blade tip of each of the plurality of rotor blades and the outer casing. The outer casing includes a plurality of features formed into an interior surface thereof. Each of the plurality of features includes one or more design parameters that are perturbed about a mean design parameter for stall performance so as to provide a circumferential variation in wake strengths associated with the plurality of rotor blades, thereby reducing operational noise of the gas turbine engine.Type: ApplicationFiled: October 3, 2022Publication date: April 11, 2024Inventors: Trevor Howard Wood, Ramakrishna Venkata Mallina, Giridhar Jothiprasad, Kishore Ramakrishnan, Thomas Malkus
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Patent number: 11938539Abstract: A build unit for additively manufacturing three-dimensional objects may include an energy beam system having one or more irradiation devices respectively configured to direct one or more energy beams onto a region of a powder bed, and an inertization system including an irradiation chamber defining an irradiation plenum, one or more supply manifolds, and a return manifold. The one or more supply manifolds may include a downflow manifold configured to provide a downward flow of a process gas through at least a portion of the irradiation plenum defined by the irradiation chamber, and/or a crossflow manifold configured to provide a lateral flow of the process gas through at least a portion of the irradiation plenum defined by the irradiation chamber. The return manifold may evacuate or otherwise remove process gas from the irradiation plenum defined by the irradiation chamber.Type: GrantFiled: April 16, 2021Date of Patent: March 26, 2024Assignees: General Electric Company, Concept Laser GmbHInventors: Eric Edward Halla, Ramakrishna Venkata Mallina, Kishore Ramakrishnan, Shashwat Swami Jaiswal, Mohammed Mounir Shalaby, Peter Pontiller-Schymura
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Patent number: 11759861Abstract: A build unit for additively manufacturing three-dimensional objects may include an energy beam system having one or more irradiation devices respectively configured to direct one or more energy beams onto a region of a powder bed, and an inertization system including an irradiation chamber defining an irradiation plenum, one or more supply manifolds, and a return manifold. The one or more supply manifolds may include a downflow manifold configured to provide a downward flow of a process gas through at least a portion of the irradiation plenum defined by the irradiation chamber, and/or a crossflow manifold configured to provide a lateral flow of the process gas through at least a portion of the irradiation plenum defined by the irradiation chamber. The return manifold may evacuate or otherwise remove process gas from the irradiation plenum defined by the irradiation chamber.Type: GrantFiled: April 16, 2021Date of Patent: September 19, 2023Assignees: General Electric Company, Concept Laser GmbHInventors: Eric Edward Halla, Ramakrishna Venkata Mallina, Kishore Ramakrishnan, Shashwat Swami Jaiswal, Mohammed Mounir Shalaby, Adam Garret Susong, Peter Pontiller-Schymura
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Publication number: 20220331875Abstract: A build unit for additively manufacturing three-dimensional objects may include an energy beam system having one or more irradiation devices respectively configured to direct one or more energy beams onto a region of a powder bed, and an inertization system including an irradiation chamber defining an irradiation plenum, one or more supply manifolds, and a return manifold. The one or more supply manifolds may include a downflow manifold configured to provide a downward flow of a process gas through at least a portion of the irradiation plenum defined by the irradiation chamber, and/or a crossflow manifold configured to provide a lateral flow of the process gas through at least a portion of the irradiation plenum defined by the irradiation chamber. The return manifold may evacuate or otherwise remove process gas from the irradiation plenum defined by the irradiation chamber.Type: ApplicationFiled: April 16, 2021Publication date: October 20, 2022Inventors: Eric Edward Halla, Ramakrishna Venkata Mallina, Kishore Ramakrishnan, Shashwat Swami Jaiswal, Mohammed Mounir Shalaby, Peter Pontiller-Schymura
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Publication number: 20220332049Abstract: A build unit for additively manufacturing three-dimensional objects may include an energy beam system having one or more irradiation devices respectively configured to direct one or more energy beams onto a region of a powder bed, and an inertization system including an irradiation chamber defining an irradiation plenum, one or more supply manifolds, and a return manifold. The one or more supply manifolds may include a downflow manifold configured to provide a downward flow of a process gas through at least a portion of the irradiation plenum defined by the irradiation chamber, and/or a crossflow manifold configured to provide a lateral flow of the process gas through at least a portion of the irradiation plenum defined by the irradiation chamber. The return manifold may evacuate or otherwise remove process gas from the irradiation plenum defined by the irradiation chamber.Type: ApplicationFiled: April 16, 2021Publication date: October 20, 2022Inventors: Eric Edward Halla, Ramakrishna Venkata Mallina, Kishore Ramakrishnan, Shashwat Swami Jaiswal, Mohammed Mounir Shalaby, Peter Pontiller-Schymura
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Publication number: 20220331869Abstract: A build unit for additively manufacturing three-dimensional objects may include an energy beam system having one or more irradiation devices respectively configured to direct one or more energy beams onto a region of a powder bed, and an inertization system including an irradiation chamber defining an irradiation plenum, one or more supply manifolds, and a return manifold. The one or more supply manifolds may include a downflow manifold configured to provide a downward flow of a process gas through at least a portion of the irradiation plenum defined by the irradiation chamber, and/or a crossflow manifold configured to provide a lateral flow of the process gas through at least a portion of the irradiation plenum defined by the irradiation chamber. The return manifold may evacuate or otherwise remove process gas from the irradiation plenum defined by the irradiation chamber.Type: ApplicationFiled: April 16, 2021Publication date: October 20, 2022Inventors: Eric Edward Halla, Ramakrishna Venkata Mallina, Kishore Ramakrishnan, Shashwat Swami Jaiswal, Mohammed Mounir Shalaby, Adam Garret Susong, Peter Pontiller-Schymura
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Patent number: 10823194Abstract: A compressor is provided including a casing, a hub, a flow path, a plurality of blades, and an end-wall treatment formed in at least one of the casing and the hub, and facing a tip of each blade. The flow path is formed between the casing and the hub, and the plurality of blades is positioned in the flow path. The tip of each blade and the end-wall treatment are configured to move relative to each other. Such end-wall treatment includes a first recess portion extending along a first axis to maintain a fluid flow substantially straight through the first recess portion. The end-wall treatment further includes a plurality of second recess portions spaced apart from each other and extending from the first recess portion along a second axis different than the first axis to maintain the fluid flow substantially straight through the plurality of second recess portions.Type: GrantFiled: December 1, 2014Date of Patent: November 3, 2020Assignee: GENERAL ELECTRIC COMPANYInventors: Giridhar Jothiprasad, Ramakrishna Venkata Mallina, John David Stampfli, Rudolf Konrad Selmeier, Davide Giacché
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Patent number: 10539154Abstract: A compressor is provided including a compressor end-wall having a casing and a hub. The compressor further includes at least one set of rotor blades, one set of stator blades, and a plurality of end-wall treatments spaced apart from each other, formed in an interior surface of at least one of the casing and hub, and facing a tip of the rotor blade or stator blade. Each end-wall treatment includes a forward recess portion extending along a first axis and an aft recess portion extending along a second axis different than the first axis. The aft recess portion is joined to the corresponding forward recess portion via an intersection portion which is inclined relative to at least one of the first axis, and the second axis. The aft recess portion and/or the forward recess portion are bent from the intersection portion and inclined relative to an axial direction of the compressor.Type: GrantFiled: December 10, 2014Date of Patent: January 21, 2020Assignee: General Electric CompanyInventors: Ramakrishna Venkata Mallina, Sungho Yoon, Vittorio Michelassi, Ivan Malcevic
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Patent number: 10047620Abstract: A compressor for a gas turbine engine including one or more endwall treatments for controlling leakage flow and circumferential flow non-uniformities in the compressor. The compressor includes a casing, a hub, a flow path formed between the casing and the hub, a plurality of blades positioned in the flow path, and one or more circumferentially varying end-wall treatments formed in an interior surface of at least one of the casing or the hub. Each of the one or more circumferentially varying endwall treatments circumferentially varying based on their relative position to an immediately adjacent upstream bladerow. Each of the one or more endwall treatments is circumferentially varied in at least one of placement relative to the immediately adjacent upstream bladerow or in geometric parameters defining each of the plurality of circumferentially varying endwall treatments. Additionally disclosed is an engine including the compressor.Type: GrantFiled: December 16, 2014Date of Patent: August 14, 2018Assignee: GENERAL ELECTRIC COMPANYInventors: Davide Giacché, John David Stampfli, Ramakrishna Venkata Mallina, Vittorio Michelassi, Giridhar Jothiprasad, Ajay Keshava Rao, Rudolf Konrad Selmeier, Sungho Yoon, Ivan Malcevic
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Publication number: 20170328377Abstract: A compressor is provided including a compressor end-wall having a casing and a hub. The compressor further includes at least one set of rotor blades, one set of stator blades, and a plurality of end-wall treatments spaced apart from each other, formed in an interior surface of at least one of the casing and hub, and facing a tip of the rotor blade or stator blade. Each end-wall treatment includes a forward recess portion extending along a first axis and an aft recess portion extending along a second axis different than the first axis. The aft recess portion is joined to the corresponding forward recess portion via an intersection portion which is inclined relative to at least one of the first axis, and the second axis. The aft recess portion and/or the forward recess portion are bent from the intersection portion and inclined relative to an axial direction of the compressor.Type: ApplicationFiled: December 10, 2014Publication date: November 16, 2017Inventors: Ramakrishna Venkata MALLINA, Sungho YOON, Vittorio MICHELASSI, Ivan MALCEVIC
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Publication number: 20160169017Abstract: A compressor for a gas turbine engine including one or more endwall treatments for controlling leakage flow and circumferential flow non-uniformities in the compressor. The compressor includes a casing, a hub, a flow path formed between the casing and the hub, a plurality of blades positioned in the flow path, and one or more circumferentially varying end-wall treatments formed in an interior surface of at least one of the casing or the hub. Each of the one or more circumferentially varying endwall treatments circumferentially varying based on their relative position to an immediately adjacent upstream bladerow. Each of the one or more endwall treatments is circumferentially varied in at least one of placement relative to the immediately adjacent upstream bladerow or in geometric parameters defining each of the plurality of circumferentially varying endwall treatments. Additionally disclosed is an engine including the compressor.Type: ApplicationFiled: December 16, 2014Publication date: June 16, 2016Inventors: Davide Giacché, John David Stampfli, Ramakrishna Venkata Mallina, Vittorio Michelassi, Giridhar Jothiprasad, Ajay Keshava Rao, Rudolf Konrad Selmeier, Sungho Yoon, Ivan Malcevic
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Publication number: 20160153360Abstract: A compressor is provided including a casing, a hub, a flow path, a plurality of blades, and an end-wall treatment formed in at least one of the casing and the hub, and facing a tip of each blade. The flow path is formed between the casing and the hub, and the plurality of blades is positioned in the flow path. The tip of each blade and the end-wall treatment are configured to move relative to each other. Such end-wall treatment includes a first recess portion extending along a first axis to maintain a fluid flow substantially straight through the first recess portion. The end-wall treatment further includes a plurality of second recess portions spaced apart from each other and extending from the first recess portion along a second axis different than the first axis to maintain the fluid flow substantially straight through the plurality of second recess portions.Type: ApplicationFiled: December 1, 2014Publication date: June 2, 2016Inventors: Giridhar Jothiprasad, Ramakrishna Venkata Mallina, John David Stampfli, Rudolf Konrad Selmeier, Davide Giacché
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Publication number: 20160153465Abstract: An axial compressor for a gas turbine engine including one or more endwall treatments for controlling leakage flow in the compressor. The one or more endwall treatments having a height formed in an interior surface of a compressor casing or a compressor hub and configured to return a flow adjacent a plurality of rotor blade tips or a plurality of stator blade tips to a cylindrical flow passage upstream of a point of removal of the flow. Each of the endwall treatments defining a front wall, a rear wall, an outer wall extending between the front wall and the rear wall, an axial overhang, an axial overlap, an axial lean angle and a tangential lean angle. The axial overhang extending upstream to overhang at least one of the at least one set of rotor blades or the at least one set of stator blades. The axial overlap extending downstream to overlap at least one of the at least one set of rotor blades or the at least one set of stator blades.Type: ApplicationFiled: December 1, 2014Publication date: June 2, 2016Inventors: Sungho Yoon, John David Stampfli, Ramakrishna Venkata Mallina, Vittorio Michelassi, Giridhar Jothiprasad, Ajay Keshava Rao, Rudolf Konrad Selmeier, Davide Giacché, Ivan Malcevic
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Patent number: 7817422Abstract: A heat sink for directly cooling at least one electronic device package is provided. The electronic device package has an upper contact surface and a lower contact surface. The heat sink comprises a cooling piece formed of at least one thermally conductive material. The cooling piece defines multiple inlet manifolds configured to receive a coolant and multiple outlet manifolds configured to exhaust the coolant. The inlet and outlet manifolds are interleaved. The cooling piece further defines multiple millichannels configured to receive the coolant from the inlet manifolds and to deliver the coolant to the outlet manifolds. The millichannels and inlet and outlet manifolds are further configured to directly cool one of the upper and lower contact surface of the electronic device package by direct contact with the coolant, such that the heat sink comprises an integral heat sink.Type: GrantFiled: August 18, 2008Date of Patent: October 19, 2010Assignee: General Electric CompanyInventors: Satish Sivarama Gunturi, Mahadevan Balasubramaniam, Ramakrishna Venkata Mallina, Richard Alfred Beaupre, Le Yan, Richard S. Zhang, Ljubisa Dragoljub Stevanovic, Adam Gregory Pautsch, Stephen Adam Solovitz
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Publication number: 20100038058Abstract: A heat sink for directly cooling at least one electronic device package is provided. The electronic device package has an upper contact surface and a lower contact surface. The heat sink comprises a cooling piece formed of at least one thermally conductive material. The cooling piece defines multiple inlet manifolds configured to receive a coolant and multiple outlet manifolds configured to exhaust the coolant. The inlet and outlet manifolds are interleaved. The cooling piece further defines multiple millichannels configured to receive the coolant from the inlet manifolds and to deliver the coolant to the outlet manifolds. The millichannels and inlet and outlet manifolds are further configured to directly cool one of the upper and lower contact surface of the electronic device package by direct contact with the coolant, such that the heat sink comprises an integral heat sink.Type: ApplicationFiled: August 18, 2008Publication date: February 18, 2010Applicant: GENERAL ELECTRIC COMPANYInventors: Satish Sivarama Gunturi, Mahadevan Balasubramaniam, Ramakrishna Venkata Mallina, Richard Alfred Beaupre, Le Yan, Richard S. Zhang, Ljubisa Dragoljub Stevanovic, Adam Gregory Pautsch, Stephen Adam Solovitz
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Publication number: 20100038774Abstract: A heat sink for cooling at least one electronic device package is provided. The electronic device package has an upper contact surface and a lower contact surface. The heat sink comprises at least one thermally conductive material and defines multiple inlet manifolds configured to receive a coolant, multiple outlet manifolds configured to exhaust the coolant, and multiple millichannels configured to receive the coolant from the inlet manifolds and to deliver the coolant to the outlet manifolds. The manifolds and millichannels are disposed proximate to the respective one of the upper and lower contact surface of the electronic device package for cooling the respective surface with the coolant.Type: ApplicationFiled: August 18, 2008Publication date: February 18, 2010Applicant: GENERAL ELECTRIC COMPANYInventors: Richard S. Zhang, Richard Alfred Beaupre, Ramakrishna Venkata Mallina, Arun Virupaksha Gowda, Le Yan, Ljubisa Dragoljub Stevanovic, Peter Morley, Stephen Adam Solovitz