The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 18, 2022
Filed:
Apr. 18, 2019
United Technologies Corporation, Farmington, CT (US);
Joseph Kehoe, Vernon, 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);
RAYTHEON TECHNOLOGIES CORPORATION, Farmington, CT (US);
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.