|국가/구분||United States(US) Patent 등록|
|국제특허분류(IPC7판)||F02K-003/02 F02K-003/00 B64C-009/28 B64C-009/00 B64C-015/00 F01N-001/14|
|미국특허분류(USC)||060/204; 060/226.1; 060/262; 060/264; 239/265.19; 181/220; 244/035.R; 244/211|
|발명자 / 주소|
|출원인 / 주소|
|인용정보||피인용 횟수 : 5 인용 특허 : 3|
Disclosed is a means for reducing jet engine exhaust noise wherein mixing is enhanced between adjacent exhaust flows and between exhaust flow and free-stream flow. Also disclosed is a means for improving the thrust of jet engines and for reducing the noise and drag of aircraft. The device is a segmented, triangular or trapezoidal shaped, curved extension to a nozzle's sleeve or surface trailing edge that results in a serrated trailing edge. The extensions enhance the natural free mixing of the adjacent flows and therefore reduce the acoustic energy assoc...
What is claimed is: 1. A method for creating vortexes to mix two adjacent flows and reduce noise and drag from a jet engine or aircraft comprising: a stream-wise segmented nozzle or surface extension having a substantially triangular or trapezoidal saw toothed planform shape with semi-round tips and valleys wherein vortexes are created by immersing the tip of the segmented nozzle or surface extension into either flow adjacent to the nozzle or surface extension. 2. A method for utilizing segmented surface or nozzle extensions on a jet engine accordin...