Airfoil acoustic impedance control

Details Airfoil acoustic impedance control Airfoil acoustic impedance control

2007-05-29

2009-10-27

Cuff, Michael (Department: 3741)

Power plants

Reaction motor

Interrelated reaction motors

C415S119000, C415S115000, C416S232000, C416S233000

Reexamination Certificate

active

07607287

ABSTRACT:
A noise control cassette for a gas turbine engine includes a perforated face sheet configured for exposure to an airflow, a non-perforated backing sheet, a core arranged between the face sheet and the backing sheet and defining a cavity between the face sheet and the backing sheet having an effective length tuned so as to provide acoustic reactance control, and an attachment face for attaching the cassette to an airfoil-shaped structure.

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