United Technologies Corporation

United States of America As Represented by the Secretary of the Air Force

Gregory J Mack

Charles M Love

Roland Benoit

Eugene M Beverly

Thomas A Auxier

George W Kelch

Robert V Sloop

Daryl J Graber

An improved abrasive blade tip for gas turbine engines is taught, wherein an abrasive tip coating is applied to the blade tip in such a manner as to lessen wear through of the abrasive and the underlying airfoil on the leading and trailing edges, by coating the blade tip with abrasive not only on the tip surface per se, but so as to cover portions of the convex and concave airfoil surfaces at the corners where the tip surface intersects the leading and trailing edges.

Abrasive blade tip

This disclosure describes a cooling and manufacturing enhancement for gas turbine engine outer air seals. The invention provides convective cooling in a counter-flow array, internal heat transfer augmentation through the use of boundary layer trip-strips, coolant Mach number control through the use of tapered convective channels, inter-segment purge without additional secondary cooling air, and is castable.

Turbine blade outer air seal with optimized cooling

Hollow inlet guide vanes in the air intake of a gas turbine engine are supplied with pressurized bleed air. The interior of the vanes are provided with orifices through which the bleed air must flow, and those orifices are tuned to a desired frequency which sets up vane vibrations. This arrangement provides deicing by both the supply of heated bleed air which impinges on the selected areas of the vanes and by the vibrations which are set up in the vanes, and it does so simply with the use of the bleed air.

Acoustical anti-icing system

Growing community of inventors

Palm Beach Gardens, FL, United States of America

Gregory J Mack