United Technologies Corporation

Douglas E Duke

Michael D Greenberg

William Abdel-Messeh

Ricardo Trindade

Jose A Lopes

Richard M Murphy

William H Greene, Jr

Andrew J Lutz

Patrick R Carey

Eric Herbst

Karl J Yaeger

James A Sunamoto

Aaron T Frost

Kevin J Pallos

Kenneth J Sawyer

Zonda L Feulner

Dennis C Shooter

The ends of cooling air passages in turbine blades and/or vanes of a gas turbine engine are provided with turbulation promoters to enhance the cooling of such structures as inner and outer shrouds and the like to accommodate thermal loads thereon.

Enhanced turbine airfoil cooling

A portable device for refurbishing an edge of an airfoil is provided that has an edge shaper and airfoil positioners that positively engage the airfoil. A method for refurbishing an edge of an airfoil is also provided that includes the steps of (a) providing the portable refurbishing device; (b) locating the edge shaper and the airfoil edge relative to one another with the positioners; and (c) moving one of the device or the airfoil relative to the other along the airfoil edge.

Method and apparatus for refurbishing a gas turbine airfoil

An array (32) of flow directing elements such as fan blades (20) for a turbine engine (10) is disclosed. Each blade in the array has a set of circumferentially shrouds (42, 44) whose contact edges (46, 48) abut each other during engine operation. A shroud angle .sigma. establishes the running chord angle .alpha. of the airfoil (30) portion of the array. Slight differences in the shroud angles of adjacent blades cause corresponding differences in the running chord angles so that the array is detuned and airfoil flutter is precluded.

Flutter resistant blades, vanes and arrays thereof for a turbomachine

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Hebron, CT, United States of America

Douglas E Duke