The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 01, 2000
Filed:
Jun. 05, 1996
Applicant:
Inventor:
Anthony M Blackner, Kirkland, WA (US);
Assignee:
The Boeing Company, Seattle, WA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F02K / ;
U.S. Cl.
CPC ...
602261 ; 244130 ; 244208 ; 181213 ;
Abstract
A jet engine has a noise reduction system which reduces the boundary layer located on the outer surface of the nacelle. The noise reduction system includes a plurality of openings located in the outer surface of the nacelle which are in communication with a source of low pressure. The low pressure causes a reduction in the boundary layer at the openings so that resulting ambient air flow velocity near the nacelle surface is increased. This causes a reduction in the shearing between the secondary and ambient airflows thereby reducing the noise.