# US 2006/0216144 A1 · First and second stage turbine airfoil shapes > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2006/0216144 A1 - Document ID: US20060216144A1 - Status: Published application - Kind: A1 - Application number: 11/090,300 - Filed: 2005-03-28 - Published: 2006-09-28 - Earliest claimed: 2005-03-28 - Inventors: Michael Sullivan; Dale Ladoon; Ferruccio Candela; Adam Fredmonski - Web page: https://patentgrep.com/patent/US20060216144A1 ## CPC - F01D 5/142: {of the blades of successive rotor or stator blade-rows} - F01D 5/141: {Shape, i.e. outer, aerodynamic form (F01D5/148 - F01D5/20 take precedence; blade construction F01D5/147)} - F05D 2250/70: Shape - F05D 2250/74: given by a set or table of xyz-coordinates - Y10S 416/02: Formulas of curves - 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 - Y10S: TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS ## Abstract The first stage nozzles and buckets have nominal airfoil profiles substantially in accordance with Cartesian coordinate values of X, Y and R set forth in Tables I and II, respectively, and second stage nozzles and buckets have nominal airfoil profiles substantially in accordance with Cartesian coordinate values set forth in Tables III and IV, respectively. The X, Y and R values are in millimeters. R represents distances along a radius from an axis of rotation of the turbine. For each airfoil, X and Y are distances which, when connected by smooth continuous arcs, define airfoil profile sections in planes normal to the radius at each distance R. The profile sections at the R distances for each airfoil are joined smoothly with one another to form the airfoil shape. The airfoil shapes given by the X, Y and R distances lie within envelopes of ±4.064 millimeters in a direction normal to any airfoil surface location therealong. ## Claims ### Claim 1 A turbine nozzle including an airfoil having an airfoil shape, said airfoil having a nominal profile substantially in accordance with Cartesian coordinate values of X, Y and R set forth in millimeters in Table I wherein R is a distance along a radius from an axis of rotation of the turbine and X and Y are distances which, when connected by smooth continuing arcs, define airfoil profile sections in planes normal to the radius and at each distance R, the profile sections at the R distances being joined smoothly with one another to form said airfoil shape. ### Claim 2 (depends on 1) A turbine nozzle according to claim 1 forming part of a first stage of a turbine. ### Claim 3 (depends on 1) A turbine nozzle according to claim 1 wherein said airfoil shape lies in an envelope within ±4.064 millimeters in a direction normal to any airfoil surface location. ### Claim 4 A turbine bucket including an airfoil having an airfoil shape, said airfoil having a nominal profile substantially in accordance with Cartesian coordinate values of X, Y and R set forth in millimeters in Table II wherein R is a distance along a radius from an axis of rotation of the turbine and X and Y are distances which, when connected by smooth continuing arcs, define airfoil profile sections in planes normal to the radius and at each distance R, the profile sections at the R distances being joined smoothly with one another to form said airfoil shape. ### Claim 5 (depends on 4) A turbine bucket according to claim 4 forming part of a first stage of a turbine. ### Claim 6 (depends on 4) A turbine bucket according to claim 4 wherein said airfoil shape lies in an envelope within 4.064 millimeters in a direction normal to any airfoil surface location. ### Claim 7 A turbine nozzle including an airfoil having an airfoil shape, said airfoil having a nominal profile substantially in accordance with Cartesian coordinate values of X, Y and R set forth in millimeters in Table III wherein R is a distance along a radius from an axis of rotation of the turbine and X and Y are distances which, when connected by smooth continuous arcs, define airfoil profile sections in planes normal to the radius and at each distance R, the profile sections in planes normal to the radius and at the R distances being joined smoothly with one another to form said airfoil shape. ### Claim 8 (depends on 7) A turbine nozzle according to claim 7 forming part of a second stage of the turbine. ### Claim 9 (depends on 7) A turbine nozzle according to claim 7 wherein said airfoil shape lies in an envelope within ±4.064 millimeters in a direction normal to any airfoil surface location. ### Claim 10 A turbine bucket including an airfoil having an airfoil shape, said airfoil having a nominal profile substantially in accordance with Cartesian coordinate values of X, Y and R set forth in millimeters in Table IV wherein R is a distance along a radius from an axis of rotation of the turbine and X and Y are distances which, when connected by smooth continuous arcs, define airfoil profile sections in planes normal to the radius and at each distance R, the profile sections at the R distances being joined smoothly with one another to form the airfoil shape. ### Claim 11 (depends on 10) A turbine bucket according to claim 10 forming part of a second stage of the turbine. ### Claim 12 (depends on 10) A turbine bucket according to claim 10 wherein said airfoil shape lies in an envelope within ±4.064 millimeters in a direction normal to any airfoil surface location. ### Claim 13 A first stage of a turbine having a plurality of nozzles in a circumferential array thereof about a turbine axis and a plurality of buckets in a circumferential array thereof about said axis downstream of said nozzles, each said nozzle including an airfoil having an airfoil shape, said airfoil having a nominal profile substantially in accordance with Cartesian coordinate values of X, Y and R set forth in millimeters in Table I wherein R is a distance along a radius from the axis of rotation of the turbine and X and Y are distances which, when connected by smooth continuing arcs, define airfoil profile sections in planes normal to the radius and at each distance R, the profile sections at the R distances being joined smoothly with one another to form said airfoil shape, each said bucket including a bucket airfoil having an airfoil shape, said bucket airfoil having a nominal airfoil profile substantially in accordance with Cartesian coordinate values of X, Y and R set forth in millimeters Table II wherein R is a distance along a radius from the axis of rotation of the turbine and X and Y are distances which, when connected by smooth continuing arcs, define bucket airfoil profile sections in planes normal to the radius and at each distance R, the profile sections at the R distances of Table II being joined smoothly with one another to form said bucket airfoil shape. ### Claim 14 (depends on 13) A second turbine stage according to claim 13 wherein each said airfoil shape of each of said nozzle and said bucket lies in an envelope within ±4.064 millimeters in a direction normal to any airfoil surface location therealong. ### Claim 15 A second stage of a turbine having a plurality of nozzles in a circumferential array thereof about a turbine axis and a plurality of buckets in a circumferential array thereof about said axis downstream of said nozzles, each said nozzle including an airfoil having an airfoil shape, said airfoil having a nominal profile substantially in accordance with Cartesian coordinate values of X, Y and R set forth in millimeters in Table III wherein R is a distance along a radius from the axis of rotation of the turbine and X and y are distances which, when connected by smooth continuous arcs, define airfoil profile sections in planes normal to the radius and at each distance R, the profile sections at the R distances being joined smoothly with one another to form said airfoil shape, each said bucket including a bucket airfoil having an airfoil shape, said bucket airfoil having a nominal profile substantially in accordance with Cartesian coordinate values of X, Y and R set forth in millimeters in Table IV wherein R is a distance along a radius from the axis of rotation of the turbine and X and Y are distances which, when connected by smooth continuous arcs, define airfoil profile sections in planes normal to the radius and at each distance R, the profile sections at the R distances of Table IV being joined smoothly with one another to form said bucket airfoil shape ### Claim 16 (depends on 15) A second stage of a turbine according to claim 15 wherein each said airfoil shape of each of said nozzles and said buckets lie in an envelope within ±4.064 millimeters in a direction normal to any airfoil surface location therealong.