# US 10,502,069 B2 · Turbomachine rotor blade > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,502,069 B2 - Document ID: US10502069B2 - Status: Granted - Kind: B2 - Application number: 15/615,876 - Filed: 2017-06-07 - Published: 2018-12-13 - Granted: 2019-12-10 - Earliest claimed: 2017-06-07 - Assignees: General Electric Company - Applicants: General Electric Company - Inventors: Mark Andrew Jones; Bradley Taylor Boyer - Web page: https://patentgrep.com/patent/US10502069B2 ## CPC - F01D 5/187: {Convection cooling} - F01D 5/20: Specially-shaped blade tips to seal space between tips and stator {(F01D5/225 takes precedence)} - F01D 5/225: {by shrouding} - F05D 2220/32: in gas turbines - F05D 2240/81: Cooled platforms - F05D 2250/314: the axes being inclined in relation to each other - F05D 2250/52: Outlet - F05D 2260/201: by impingement of a fluid - F01D: NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES (machines or engines for liquids F03; non-positive displacement pumps F04D) - F05D: INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS ## Abstract A rotor blade includes an airfoil defining at least one cooling passage and a camber line extending from a leading edge to a trailing edge. The rotor blade further includes a tip shroud coupled to the airfoil, the tip shroud and the airfoil defining a core fluidly coupled to the at least one cooling passage, the core including a plurality of outlet apertures, each of the plurality of outlet apertures including an opening defined in an exterior surface of the tip shroud. A first outlet aperture is oriented to exhaust cooling fluid through the opening thereof in a direction that is between 15 degrees from parallel to and parallel to the camber line at the trailing edge. A second outlet aperture is oriented to exhaust cooling fluid through the opening thereof in a direction that is greater than 15 degrees from parallel to the camber line at the trailing edge. ## Claims ### Claim 1 A rotor blade for a turbomachine, comprising: an airfoil defining at least one cooling passage, the airfoil further defining a camber line extending from a leading edge to a trailing edge; and a tip shroud coupled to the airfoil, the tip shroud and the airfoil defining a core fluidly coupled to the at least one cooling passage, the core comprising a plurality of outlet apertures, each of the plurality of outlet apertures comprising an opening defined in an exterior surface of the tip shroud, wherein a first outlet aperture of the plurality of outlet apertures is oriented to exhaust cooling fluid through the opening of the first outlet aperture in a direction that is within 15 degrees of parallel to the camber line at the trailing edge and is oriented with a hot gas path direction of flow through the turbomachine, and a second outlet aperture of the plurality of outlet apertures is oriented to exhaust cooling fluid through the opening of the second outlet aperture in a direction that is greater than 15 degrees from parallel to the camber line at the trailing edge, whereby the cooling fluid exhausted through the opening of the first outlet aperture supplies additional thrust to the rotor blade and improved aerodynamic performance is facilitated. ### Claim 2 (depends on 1) The rotor blade of claim 1, wherein the first outlet aperture is a plurality of first outlet apertures. ### Claim 3 (depends on 1) The rotor blade of claim 1, wherein the opening of the first outlet aperture is defined in a non-radial face of the tip shroud. ### Claim 4 (depends on 3) The rotor blade of claim 3, wherein the non-radial face is a trailing edge face. ### Claim 5 (depends on 1) The rotor blade of claim 1, wherein the core comprises a body cavity, and wherein each of the plurality of outlet apertures is in fluid communication with the body cavity. ### Claim 6 (depends on 1) The rotor blade of claim 1, wherein the first outlet aperture is oriented to exhaust cooling fluid through the opening of the first outlet aperture in a direction that is within 5 degrees of parallel to the camber line at the trailing edge. ### Claim 7 (depends on 1) The rotor blade of claim 1, wherein the second outlet aperture is a plurality of second outlet apertures. ### Claim 8 (depends on 1) The rotor blade of claim 1, wherein the opening of the second outlet aperture is defined in a non-radial face of the tip shroud. ### Claim 9 (depends on 8) The rotor blade of claim 8, wherein the non-radial face is a leading edge face. ### Claim 10 (depends on 8) The rotor blade of claim 8, wherein the non-radial face is one of a pressure side face or a suction side face. ### Claim 11 A rotor blade for a turbomachine, comprising: an airfoil defining at least one cooling passage, the airfoil further defining a camber line extending from a leading edge to a trailing edge; and a tip shroud coupled to the airfoil, the tip shroud comprising a pressure side face, a suction side face, a leading edge face, and a trailing edge face, the tip shroud and the airfoil defining a core fluidly coupled to the at least one cooling passage, the core comprising a plurality of outlet apertures, each of the plurality of outlet apertures comprising an opening defined in an exterior surface of the tip shroud, wherein the opening of a first outlet aperture of the plurality of outlet apertures is defined in the trailing edge face and the opening of a second outlet aperture of the plurality of outlet apertures is defined in one of the pressure side face, the suction side face, or the leading edge face, and wherein the first outlet aperture is oriented to exhaust cooling fluid through the opening of the first outlet aperture in a direction that is within 15 degrees of parallel to the camber line at the trailing edge and is oriented with a hot gas path direction of flow through the turbomachine, and the second outlet aperture is oriented to exhaust cooling fluid through the opening of the second outlet aperture in a direction that is greater than 15 degrees from parallel to the camber line at the trailing edge, whereby the cooling fluid exhausted through the opening of the first outlet aperture supplies additional thrust to the rotor blade and improved aerodynamic performance is facilitated. ### Claim 12 (depends on 11) The rotor blade of claim 11, wherein the first outlet aperture is a plurality of first outlet apertures. ### Claim 13 (depends on 11) The rotor blade of claim 11, wherein the core comprises a body cavity, and wherein each of the plurality of outlet apertures is in fluid communication with the body cavity. ### Claim 14 (depends on 11) The rotor blade of claim 11, wherein the first outlet aperture is oriented to exhaust cooling fluid through the opening of the first outlet aperture in a direction that is within 5 degrees of parallel to the camber line at the trailing edge. ### Claim 15 (depends on 11) The rotor blade of claim 11, wherein the second outlet aperture is a plurality of second outlet apertures. ### Claim 16 (depends on 11) The rotor blade of claim 11, wherein the one of the pressure side face, the suction side face, or the leading edge face is the leading edge face. ### Claim 17 (depends on 11) The rotor blade of claim 11, wherein the one of the pressure side face, the suction side face, or the leading edge face is one of the pressure side face or the suction side face.