Back to results
US 12,759,717 B2Granted
Gas turbine engine noise reduction
AssigneeGeneral Electric Company
InventorsKishore Ramakrishnan, Trevor Howard Wood, Harry Kirk Mathews, Jr., Eric Richard Westervelt, Honggang Wang, Timothy Richard DePuy
Life of this patent
Estimating the term…
Abstract
An aircraft engine includes a low pressure spool, a high pressure spool, and an alternative power source. The alternative power source is configured to add power to the high pressure spool. A controller is configured to determine a noise sensitive condition; and control, in response to determining the noise sensitive condition, the alternative power source to add power to the high pressure spool.
Claims18
An aircraft engine, comprising:
- a low pressure spool;
- a high pressure spool;
- an electric machine assembly;
- a primary power source configured to provide first power to the engine;
- an alternative power source configured to add second power to the high pressure spool, wherein the second power is in addition to the first power provided to the engine by the primary power source;
- and
- a controller configured to:
- determine a noise sensitive condition based on a noise value approaching or exceeding a selected noise threshold;
- and
- control, in response to determining the noise sensitive condition, the alternative power source to add power to the high pressure spool with the electric machine assembly to reduce the noise value to below the selected noise threshold while maintaining a nominal thrust of the engine.
7 more elements
An aircraft engine, comprising:
- a low pressure spool;
- a high pressure spool;
- an electric machine assembly including a first electric machine disposed on the low pressure spool and a second electric machine disposed on the high pressure spool;
- a primary power source configured to provide first power to the engine;
- an alternative power source configured to add second power to the high pressure spool, wherein the second power is in addition to the first power provided to the engine by the primary power source;
- and
- a controller configured to:
- determine a noise sensitive condition based on a noise value approaching or exceeding a selected noise threshold;
- and
- in response to determining the noise sensitive condition:
- control the alternative power source to add power to the high pressure spool to reduce noise while maintaining a nominal thrust of the engine;
- increase the speed of the high pressure spool with the second electric machine, the high pressure spool including a high pressure compressor, wherein increasing the speed of the high pressure spool moves a first operating point on a compressor map of the high pressure compressor from a first nominal operating point to a first noise reduction operating point;
- and
- reduce the speed of the low pressure spool with the first electric machine, the low pressure spool including a low pressure compressor, wherein reducing the speed of the low pressure spool moves a second operating point on a compressor map of a fan from a second nominal operating point to a second noise reduction operating point.
11 more elements
Dependencies are inferred from the claim text.