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US 7,055,329 B2Granted
Method and apparatus for noise attenuation for gas turbine engines using at least one synthetic jet actuator for injecting air
AssigneeGeneral Electric Company
InventorsSteven Martens, Seyed Gholamali Saddoughi, Kevin Sean Early
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Abstract
A method enables a gas turbine engine to be operated. The method comprises channeling exhaust gases from a core engine through an exhaust assembly and past at least one flow boundary surface, and selectively operating a noise suppression system extending from the at least one flow boundary surface to facilitate attenuating noise generated during engine operation.
Claims17
A method for operating a gas turbine engine, said method comprising:
- channeling exhaust gases from a core engine through an exhaust assembly and past at least one flow boundary surface;
- and
- selectively operating a noise suppression system extending from the at least one flow boundary surface to facilitate attenuating noise generated during engine operation by injecting air into a stream flow from the at least one flow boundary surface to form streamwise vortices.
An assembly for a gas turbine engine, said assembly comprising:
- a centerbody;
- a fan nozzle assembly having an outer case;
- a fan nozzle radially outwardly from said centerbody, at least one of said fan nozzle and said centerbody comprises a flow boundary;
- and
- a noise suppression system extending from at least one of said fan assembly outer case and said centerbody, said noise suppression system selectively operable during engine operations to facilitate attenuating jet noise generated during engine operation and configured to inject air from at least one flow boundary surface and generate streamwise vortices into at least one of a bypass stream flow and a freestream flowing past said assembly.
2 more elements
A gas turbine engine comprising:
- a core engine;
- and
- an exhaust assembly extending downstream from said core engine for discharging exhaust gases from said core engine, said exhaust assembly comprising a flow boundary surface and a noise suppression system extending from said flow boundary surface, said noise suppression system is selectively operable to facilitate attenuating noise generated during engine operation by injecting air outwardly from said at least one flow boundary surface to generate streamwise vortices.
Dependencies are inferred from the claim text.