Rotary kinetic fluid motors or pumps – With sound or vibratory wave absorbing or preventing means...
Patent
1996-08-09
1997-12-30
Ferensic, Denise L.
Rotary kinetic fluid motors or pumps
With sound or vibratory wave absorbing or preventing means...
181212, 602261, F01D 2500, F01N 700
Patent
active
057022313
ABSTRACT:
Noise attenuating linings for a turbofan engine inlet are installed around the upper crown area and/or around the lower lip. The acoustical lining at the upper crown area attenuates those fan noise emissions which are normally reflected from the crown area downward toward the ground. The acoustical lining at the lower inlet lip attenuates those fan noise emissions which travel along the inner surface of the lip and are diffracted around the lower lip downward toward the ground.
REFERENCES:
patent: 3890060 (1975-06-01), Lipstein
patent: 3946830 (1976-03-01), Kutnet et al.
patent: 4534167 (1985-08-01), Chee
patent: 4786231 (1988-11-01), Kelley
patent: 4828175 (1989-05-01), Heufler et al.
patent: 5058617 (1991-10-01), Stockman et al.
Ferensic Denise L.
Kim Joanne
Sproule Robert H.
The Boeing Company
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