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:
Apr. 12, 1994
Filed:
Jul. 09, 1990
William R Hines, Montgomery, OH (US);
General Electric Company, Cincinnati, OH (US);
Abstract
An industrial gas turbine engine includes in serial flow relationship a booster compressor, core engine, power turbine, and flow channel, with the power turbine having a first shaft, joined to the booster compressor, and an output shaft, and the flow channel having an outlet. Means for selectively varying flow area of the channel outlet are provided for controlling stall margin of the booster compressor in an exemplary embodiment of the engine and method of operation. The flow area varying means is effective for providing a minimum area of the channel outlet for controlling booster compressor stall margin at least at a synchronous speed associated with powering an electrical generator. In one embodiment, the flow area varying means effects a minimum horsepower from the output shaft for allowing lock-on and lock-off of the electrical generator at synchronous speed. In another embodiment of the invention, the flow area varying means is effective for braking the electrical generator during a full power stopcock rollback.