Siemens Energy, Inc.

Charles M Evans

Edwin Lee Kite

John Pula

Eric Munoz

Andrew R Narcus

Robert J McClelland

A gas turbine engine blade (), including an airfoil substrate () having an exterior surface, wherein: a base () of the airfoil substrate is located at a 0% radial on an inner platform surface () and a tip () of the airfoil substrate is located at a 100% radial; wherein at the 0% radial a cross-sectional profile of the exterior surface is substantially characterized by nominal X and Y coordinates present in Table 1; and wherein at a 50% radial location a cross-sectional profile of the exterior surface is characterized by nominal X and Y coordinates present in Table 6.

Gas turbine blade configuration

A turbine blade tip shroud (C,D) with a seal rail (C,D) oriented in a circumferential direction of rotation () relative to a turbine axis, and extending radially outward from the tip relative to the turbine axis. A first tooth () and a second tooth () form respective downstream and upstream lateral departures or bumps on the seal rail. Each tooth has a sharp top leading edge () and a smoothly curved side surface (). A back portion () of the seal rail may span linearly from a lateral peak () of the second tooth to a back end () of the seal rail that is centered on an extended centerline () of a front portion () of the seal rail. The teeth may be disposed proximate or over a stacking axis () of the blade.

Turbine blade tip shroud

A turbine blade airfoil (R,M,T,) comprising an outer surface shape defined by Cartesian coordinates of successive transverse profiles at radial increments as set forth in Tables 1a to 1k, wherein each table defines a transverse sectional profile characterized by a smooth curve connecting the coordinates, and the surface shape comprises a smooth surface connecting the sectional profiles. The blade may include a tip shroud with edge profiles defined by Cartesian coordinates set forth in Table 2a and 2b. A gusset/fillet may be provided between the blade airfoil and the tip shroud, with a planar diagonal surface over most of a diagonal bracing area of the gusset/fillet.

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Tequesta, FL, United States of America

Charles M Evans