Jet nozzle mixer
US8069647B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 25, 2006 |
| Grant date | Dec 6, 2011 |
| Priority date | — |
| Expiry date | May 15, 2027 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49346
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An external jet nozzle mixer includes identically formed lobes. The external mixer works with the internal mixer further to mix the engine internal bypass flow with the internal jet engine core flow to level the disparate flow velocities, to reduce the peak velocities from the jet engine core and increase the lower bypass velocities of the engine internal bypass flow, and thereby reduce noise. The internal lobe contours act as lifting flutes, causing mixing of the primary hot and cold flows to mix before exiting the nozzle. The external lobe contours act as venturi chutes, accelerating the cooler ambient secondary air flow. The lobes thus act collectively as an injector to force the cooler ambient secondary flow into the previously mixed primary flow as it exits the nozzle. Also obtained is an increased thrust efficiency and, consequently, decreased fuel consumption and engine emissions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.