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US 8,282,336 B2Granted
Instability mitigation system
AssigneeGeneral Electric Company
InventorsAspi Rustom Wadia, Seyed Gholamali Saddoughi, Clark Leonard Applegate
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Abstract
An instability mitigation system is disclosed, comprising a detection system for detecting an onset of an instability in a rotor during the operation of the rotor, a mitigation system that facilitates the improvement of the stability of the rotor when the onset of instability is detected by the detection system, a control system for controlling the detection system and the mitigation system.
Claims12
An instability mitigation system for a rotor, the system comprising:
- a detection system comprising a sensor located on a static component spaced radially outwardly and apart from tips of a row of blades arranged circumferentially on the rotor wherein the sensor is capable of generating an input signal corresponding to a flow parameter at a location near the tip of a blade;
- a mitigation system that facilitates the improvement of the stability of the rotor when an onset of instability is detected by the detection system;
- a control system for controlling the detection system and the mitigation system;
- and
- a correlation processor that receives the input signal and a rotor speed signal and generates a stability correlation signal;
- wherein the control system comprises a controller that controls an AC potential applied to a first electrode and a second electrode of a plasma generator located on the static component;
- wherein the controller controls the AC potential by pulsing the AC potential at a selected frequency;
- and
- wherein the controller controls the AC potential by pulsing the AC potential at a frequency that is a multiple of the number blades in the row of blades.
6 more elements
An instability mitigation system for a rotor, the system comprising:
- a detection system comprising a sensor located on a static component spaced radially outwardly and apart from tips of a row of blades arranged circumferentially on the rotor wherein the sensor is capable of generating an input signal corresponding to a flow parameter at a location near the tip of a blade;
- a mitigation system that facilitates the improvement of the stability of the rotor when an onset of instability is detected by the detection system;
- a control system for controlling the detection system and the mitigation system;
- and
- a correlation processor that receives the input signal and a rotor speed signal and generates a stability correlation signal;
- wherein the control system comprises a controller that controls an AC potential applied to a first electrode and a second electrode of a plasma generator located on the static component;
- wherein the controller controls the AC potential by pulsing the AC potential at a selected frequency;
- and
- wherein the controller pulses the AC potential in-phase with a multiple of the vortex shedding frequency at the blade tip.
6 more elements
An instability mitigation system for a rotor, the system comprising:
- a detection system comprising a sensor located on a static component spaced radially outwardly and apart from tips of a row of blades arranged circumferentially on the rotor wherein the sensor is capable of generating an input signal corresponding to a flow parameter at a location near the tip of a blade;
- a mitigation system that facilitates the improvement of the stability of the rotor when an onset of instability is detected by the detection system;
- a control system for controlling the detection system and the mitigation system;
- and
- a correlation processor that receives the input signal and a rotor speed signal and generates a stability correlation signal;
- wherein the control system comprises a controller that controls an AC potential applied to a first electrode and a second electrode of a plasma generator located on the static component;
- wherein the controller controls the AC potential by pulsing the AC potential at a selected frequency;
- and
- wherein the controller pulses the AC potential out-of-phase with a multiple of the vortex shedding frequency at the blade tip.
6 more elements
Dependencies are inferred from the claim text.