Christopher L Ho

US Patent:

20200332726, Oct 22, 2020

Filed:

Apr 18, 2019

Appl. No.:

16/388227

Inventors:

- Farmington CT, US
Richard P. Meisner - Glastonbury CT, US
Manuj Dhingra - Glastonbury CT, US
Patrick D. Couture - Tolland CT, US
Matthew R. Feulner - West Hartford CT, US
Brenda J. Lisitano - Middletown CT, US
Christopher L. Ho - Hartford CT, US

International Classification:

F02C 9/54

Abstract:

A method of operating a gas turbine engine includes commanding an acceleration of the gas turbine engine and moving a variable pitch high pressure compressor vane toward an open position thereby reducing an acceleration rate of a high pressure turbine rotor thereby reducing a change in a clearance gap between the high pressure turbine rotor and a blade outer airseal. An active clearance control system of a gas turbine engine includes an engine control system configured to command an acceleration of the gas turbine engine and move a variable pitch high pressure compressor vane toward an open position thereby slowing an acceleration rate of a high pressure turbine rotor thereby reducing a change in a clearance gap between the high pressure turbine rotor and a blade outer airseal located radially outboard of the high pressure turbine rotor.