Torsional Damping for Gas Turbine Engines

摘要

The present disclosure is directed to a gas turbine engine assembly having a compressor configured to increase pressure of incoming air, a combustion chamber, at least one turbine coupled to a generator, a torsional damper, and a controller. The combustion chamber is configured to receive a pressurized air stream from the compressor. Further, fuel is injected into the pressurized air in the combustion chamber and ignited so as to raise a temperature and energy level of the pressurized air. The turbine is operatively coupled to the combustion chamber so as to receive combustion products that flow from the combustion chamber. The generator is coupled to the turbine via a shaft. Thus, the torsional damper is configured to dampen torsional oscillations of the generator. Moreover, the controller is configured to provide additional damping control to the generator.

主权项

1. A method of damping torsional oscillations of a shaft system of a gas turbine engine assembly, comprising:
providing pressurized air to a combustion chamber; injecting fuel into the pressurized air within the combustion chamber and igniting the fuel so as to raise a temperature and energy level of the pressurized air; providing combustion products from the combustion chamber to a turbine coupled via a shaft system to a generator; and generating, via the generator, AC voltage; converting, via a power converter, the AC voltage into DC voltage; damping torsional oscillations of the shaft system via an electrical damper that includes at least one resistor, wherein the electrical damper is configured to operate on the DC voltage and is integral to the converter; and controlling, via a controller, the at least one resistor so to prohibit the generator from having a constant power load.