Internally ventilated noise suppressor with large plug nozzle
US4501393A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 17, 1982 |
| Grant date | Feb 26, 1985 |
| Priority date | — |
| Expiry date | Mar 17, 2002 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB64D2033/024
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A jet engine noise suppressor particularly adapted for supersonic aircraft. The nozzle (10) has an internal wall surface (70) around a generally centrally positioned body (50) and an annular area (62) extending between the wall and the body. In this area there are separate gas and air flow ducts (64, 66) having entrance ends (82, 80) and exit ends (76, 78), the entrance ends of the gas ducts extending annularly around the body (50) to receive gas exhaust from the engine and the air ducts have entrance ends annularly outwardly of the gas ducts along the wall (70). There are openings (26) in a wall (14) upstream of the ducts to supply ambient air to the entrance ends (80) of the air ducts. There are doors (20) and actuators (24) operable to open and close the openings (26). The ducts are arranged to direct the flow patterns at the exit ends (76, 78) in a relationship inverted from that existing at the entrance ends (80, 82 ) so that the gas ducts (64) discharge annularly outwardly along shroud (100) and the air ducts (66) discharge annularly inwardly along the body (50). There is an annulus downstream of the ducts extending between the shroud (100) and the body (50) in which there ar…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.