United Technologies Corporation

Raytheon Technologies Corporation

Rtx Corporation

Paul H Spiesman

Matthew D Teicholz

John R Gendron

Glenn D Bartkowski

William G Tempelman

Sean D J Blake

Kerri A Wojcik

Christopher J Hanlon

Wyatt S Daentl

Stewart B Hatch

Sean Dj Blake

An example gas turbine engine compressor includes a first compressor section. The first compressor section includes a rotating stage that includes rotating blades and a stationary stage upstream thereof that includes stationary guide vanes. The stationary vanes controllably pivot about respective pivot axes for providing flow control into the rotating stage.

Low compressor having variable vanes

An example variable vane scheduling method includes adjusting variable vanes from a position based on a first schedule to a position based on a different, second schedule in response to a control feature. An example method of controlling flow through a compressor of a turbomachine includes moving variable vanes to positions that allow more flow into the compressor in response to bleed air being communicated away from the compressor.

Variable vane scheduling

A disclosed control system for a gas turbine engine includes a controller configured to set a position of the variable area fan nozzle according to a predetermined schedule of variable area fan nozzle positions corresponding to a flight operating condition. The schedule is determined in view of a relationship between a position of the variable area nozzle and a performance level of the engine at current flight conditions.

Scheduling of variable area fan nozzle to optimize engine performance

Growing community of inventors

Coventry, CT, United States of America

Paul H Spiesman