Patents by Inventor Prabakaran Modachur Krishnan
Prabakaran Modachur Krishnan 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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Patent number: 10132330Abstract: A system is provided, including an airfoil. The airfoil includes a first suction portion of a nominal airfoil profile substantially in accordance with Cartesian coordinate values of X, Y, and Z of a suction side as set forth in TABLE I to a maximum of three decimal places, wherein the X and Y values of the suction side are coordinate values that couple together to define suction side sections of the first suction portion of the nominal airfoil profile at each Z coordinate value, the suction side sections of the first suction portion of the nominal airfoil profile are coupled together to define the first suction portion, the airfoil includes an airfoil length along a Z axis, the first suction portion comprises a first portion length along the Z axis, the first portion length is less than or equal to the airfoil length, and the Cartesian coordinate values of X, Y, and Z are non-dimensional values convertible to dimensional distances.Type: GrantFiled: October 5, 2016Date of Patent: November 20, 2018Assignee: General Electric CompanyInventors: Prabakaran Modachur Krishnan, Dwight Eric Davidson
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Patent number: 10066641Abstract: A system is provided, including an airfoil. The airfoil includes a first suction portion of a nominal airfoil profile substantially in accordance with Cartesian coordinate values of X, Y, and Z of a suction side as set forth in TABLE I to a maximum of three decimal places, wherein the X and Y values of the suction side are coordinate values that couple together to define suction side sections of the first suction portion of the nominal airfoil profile at each Z coordinate value, the suction side sections of the first suction portion of the nominal airfoil profile are coupled together to define the first suction portion, the airfoil includes an airfoil length along a Z axis, the first suction portion comprises a first portion length along the Z axis, the first portion length is less than or equal to the airfoil length, and the Cartesian coordinate values of X, Y, and Z are non-dimensional values convertible to dimensional distances.Type: GrantFiled: October 5, 2016Date of Patent: September 4, 2018Assignee: General Electric CompanyInventors: Prabakaran Modachur Krishnan, Dwight Eric Davidson, Nandakumar Aladahalli Rangaswamy
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Publication number: 20180094643Abstract: A system is provided, including an airfoil. The airfoil includes a first suction portion of a nominal airfoil profile substantially in accordance with Cartesian coordinate values of X, Y, and Z of a suction side as set forth in TABLE I to a maximum of three decimal places, wherein the X and Y values of the suction side are coordinate values that couple together to define suction side sections of the first suction portion of the nominal airfoil profile at each Z coordinate value, the suction side sections of the first suction portion of the nominal airfoil profile are coupled together to define the first suction portion, the airfoil includes an airfoil length along a Z axis, the first suction portion comprises a first portion length along the Z axis, the first portion length is less than or equal to the airfoil length, and the Cartesian coordinate values of X, Y, and Z are non-dimensional values convertible to dimensional distances.Type: ApplicationFiled: October 5, 2016Publication date: April 5, 2018Inventors: Prabakaran Modachur Krishnan, Dwight Eric Davidson, Nandakumar Aladahalli Rangaswamy
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Publication number: 20180094644Abstract: A system is provided, including an airfoil. The airfoil includes a first suction portion of a nominal airfoil profile substantially in accordance with Cartesian coordinate values of X, Y, and Z of a suction side as set forth in TABLE I to a maximum of three decimal places, wherein the X and Y values of the suction side are coordinate values that couple together to define suction side sections of the first suction portion of the nominal airfoil profile at each Z coordinate value, the suction side sections of the first suction portion of the nominal airfoil profile are coupled together to define the first suction portion, the airfoil includes an airfoil length along a Z axis, the first suction portion comprises a first portion length along the Z axis, the first portion length is less than or equal to the airfoil length, and the Cartesian coordinate values of X, Y, and Z are non-dimensional values convertible to dimensional distances.Type: ApplicationFiled: October 5, 2016Publication date: April 5, 2018Inventors: Prabakaran Modachur Krishnan, Dwight Eric Davidson
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Patent number: 9644483Abstract: Various embodiments include a turbomachine bucket having a flow interrupter, as well as related turbomachines. Various embodiments include a turbomachine bucket having: a base section sized to couple with a turbomachine rotor, the base section having a leading edge and a trailing edge opposing the leading edge; a blade section coupled to the base section and aligned to extend radially from the base section; a shroud coupled to the blade section and aligned to extend radially from the blade section; and a flow interrupter coupled to the leading edge of the base section.Type: GrantFiled: March 1, 2013Date of Patent: May 9, 2017Assignee: General Electric CompanyInventors: Moorthi Subramaniyan, Prabakaran Modachur Krishnan
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Publication number: 20160281518Abstract: Systems and devices configured to reduce windage and mixing losses in a turbine by redirecting and/or aligning a direction of a leakage flow with the flowpath of the main flow of a turbine are disclosed. In one embodiment, a device includes: a base configured to connect to a diaphragm of a turbine; and a radial portion connected to the base and extending radially inboard from the base toward a rotor of the turbine, the radial portion oriented to adjust a direction of travel of a leakage flow of working fluid radially inboard at an angle complementary to a primary working fluid path of the turbine.Type: ApplicationFiled: June 2, 2016Publication date: September 29, 2016Inventors: Prabakaran Modachur Krishnan, Kevin Joseph Barb, Srikanth Deshpande, Moorthi Subramaniyan
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Patent number: 9453417Abstract: Systems and devices configured to reduce windage and mixing losses in a turbine by redirecting and/or aligning a direction of a leakage flow with the flowpath of the main flow of a turbine are disclosed. In one embodiment, a device includes: a base configured to connect to a diaphragm of a turbine; and a radial portion connected to the base and extending radially inboard from the base toward a rotor of the turbine, the radial portion oriented to adjust a direction of travel of a leakage flow of working fluid radially inboard at an angle complementary to a primary working fluid path of the turbine.Type: GrantFiled: October 2, 2012Date of Patent: September 27, 2016Assignee: General Electric CompanyInventors: Prabakaran Modachur Krishnan, Kevin Joseph Barb, Srikanth Deshpande, Moorthi Subramaniyan
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Publication number: 20160258295Abstract: Embodiments of the invention relate generally to rotary machines and, more particularly, to the reducing mixing of packing leakage and the main flow of hot gas or steam in gas and steam turbines, respectively. In one embodiment, the invention provides a turbine bucket comprising: a platform portion; an airfoil extending radially outward from the platform portion; and at least one recess extending radially inward into the platform portion, the at least one recess being disposed at an angle relative to a leading edge of the platform portion.Type: ApplicationFiled: March 2, 2015Publication date: September 8, 2016Inventors: Moorthi Subramaniyan, Rohit Chouhan, Prabakaran Modachur Krishnan
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Publication number: 20160201468Abstract: The present invention is an aerodynamically efficient turbine airfoil that includes a first endwall, a second endwall, a stacking axis, an aspect ratio, a percentage radial span, a tangential offset, and an angle; wherein relationships between the aspect ratio, percentage radial span, and angle are defined.Type: ApplicationFiled: January 13, 2015Publication date: July 14, 2016Inventors: Prabakaran Modachur Krishnan, Joseph Anthony Cotroneo
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Publication number: 20140248139Abstract: Various embodiments include a turbomachine bucket having a flow interrupter, as well as related turbomachines. Various embodiments include a turbomachine bucket having: a base section sized to couple with a turbomachine rotor, the base section having a leading edge and a trailing edge opposing the leading edge; a blade section coupled to the base section and aligned to extend radially from the base section; a shroud coupled to the blade section and aligned to extend radially from the blade section; and a flow interrupter coupled to the leading edge of the base section.Type: ApplicationFiled: March 1, 2013Publication date: September 4, 2014Applicant: GENERAL ELECTRIC COMPANYInventors: Moorthi Subramaniyan, Prabakaran Modachur Krishnan
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Publication number: 20140093359Abstract: Systems and devices configured to reduce windage and mixing losses in a turbine by redirecting and/or aligning a direction of a leakage flow with the flowpath of the main flow of a turbine are disclosed. In one embodiment, a device includes: a base configured to connect to a diaphragm of a turbine; and a radial portion connected to the base and extending radially inboard from the base toward a rotor of the turbine, the radial portion oriented to adjust a direction of travel of a leakage flow of working fluid radially inboard at an angle complementary to a primary working fluid path of the turbine.Type: ApplicationFiled: October 2, 2012Publication date: April 3, 2014Applicant: GENERAL ELECTRIC COMPANYInventors: Prabakaran Modachur Krishnan, Kevin Joseph Barb, Srikanth Deshpande, Moorthi Subramaniyan
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Publication number: 20130189107Abstract: A turbine includes a rotor being rotatable about an axis, a circumferential array of nozzles having circumferentially spaced airfoils and inner and outer bands disposed at opposite ends thereof, the inner band having a leading portion and a trailing portion, and an array of directors arranged on the inner band, the array of directors operative to direct a flow path of fluid, the flow path of fluid partially defined by the rotor and the inner band.Type: ApplicationFiled: January 24, 2012Publication date: July 25, 2013Applicant: GENERAL ELECTRIC COMPANYInventors: Prabakaran Modachur Krishnan, Moorthi Subramaniyan
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Publication number: 20130004290Abstract: The present application provides a turbo-machine. The turbo-machine may include a number of buckets, a number of nozzles, and a flow deflector system. The flow deflector system may include a bucket deflector and a nozzle deflector so as to limit leakage flow losses therethrough.Type: ApplicationFiled: June 29, 2011Publication date: January 3, 2013Applicant: GENERAL ELECTRIC COMPANYInventor: Prabakaran Modachur Krishnan
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Publication number: 20110280715Abstract: In one embodiment, a system includes a rotary machine and a packing seal that is disposed between rotary and stationary components of the rotary machine. The packing seal includes a pair of seal lands spaced axially along the rotary component and a seal tooth disposed at an axial position between the pair of seal lands. At least one seal land of the pair of seal lands or the seal tooth includes a curved flow-facing side and is slanted toward the curved flow-facing side.Type: ApplicationFiled: May 11, 2010Publication date: November 17, 2011Applicant: General Electric CompanyInventors: Umesh Garg, Senthil Kumar, Prabakaran Modachur Krishnan