|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||181/213 ; 60/262 ; 60/317 ; 181/220|
|발명자 / 주소|
|출원인 / 주소|
|인용정보||피인용 횟수 : 42 인용 특허 : 1|
Method and apparatus for reducing jet noise in a turbofan engine by causing internal mixing of fan and primary air to reduce the maximum velocity of gases at the nozzle exit plane by creating a particular type of vortex flow at a distance of at least one nozzle diameter forward of the nozzle exit plane. In one preferred embodiment for a JT8D engine an array of eight roll-top vortex generators are provided on each side of the splitter wall between fan and primary flows, and a portion of the fan air may be introduced into the central portion or core of the...
In a turbofan engine having an annular fan fluid flow exhaust passageway located between an outer engine cowling and a splitter wall structure, and an annular primary fluid flow exhaust passageway located inside of said splitter wall structure, apparatus for internal mixing of fan exhaust with primary exhaust forward of the nozzle exit plane of said engine comprising: a vortex generator attached to said splitter wall structure at least one nozzle diameter forward of said nozzle exit plane and extending radially into one of said annular passageways a dist...