Rotary kinetic fluid motors or pumps – With sound or vibratory wave absorbing or preventing means...
Patent
1994-11-28
1995-12-26
Look, Edward K.
Rotary kinetic fluid motors or pumps
With sound or vibratory wave absorbing or preventing means...
415118, 381 71, F01D 2504, G10K 1116
Patent
active
054781990
ABSTRACT:
A gas turbine engine fan assembly includes an equal number of rotor blades and stator vanes spaced axially therefrom. An annular duct surrounds the blades and vanes and has an inlet for receiving air and an outlet for discharging at least a portion of the air upon compression by the blades. The fan duct further includes a passive acoustic liner tuned for attenuating at least one harmonic noise tone generated by the blades, with a fundamental blade passing frequency noise tone being actively attenuated by a plurality of anti-noise sound transmitters disposed in the fan duct.
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General Electric Company
Hess Andrew C.
Lee Michael S.
Look Edward K.
Scanlon Patrick R.
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