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:
Jan. 23, 1979
Filed:
Jan. 27, 1977
Allan B Packman, West Hartford, CT (US);
United Technologies Corporation, Hartford, CT (US);
Abstract
Jet noise generation occasioned from the gaseous streams in the coaxial streams of a turbofan engine when they as well as the ambient stream encounter is reduced by designing the engine so that the value of the true velocity of the outer stream is substantially higher than the value of the true velocity of the inner stream. It is contemplated that for a turbofan engine the fan stream and primary or engine core streams are inverted so that the higher velocity stream would be in the outer coaxial passage immediately upstream of the point where the streams discharge to ambient. A modified conventional lobe mixer is utilized to invert flow streams.