Available Technologies - Search Results
| Title: | Method Of Eliminating Mach Waves From Supersonic Jets |
|---|---|
| UC Case No: | 1994-070-2-ott |
| Categories: |
Mechanical Engineering:
Aerospace
|
| Background: | Community noise is one of the major technological challenges faced by designers of future supersonic transports, such as the High-Speed Civil Transport (HSCT). The hot supersonic jets exhausting from the engines of such aircraft are powerful noise generators, especially during take-off. Untreated, they create noise levels which are environmentally unacceptable. A great portion of the noise is due to Mach waves, which are shock waves attached to turbulent eddies moving at supersonic velocities. So far, noise reduction achieved by conventional methods is marginal and is often accompanied by severe weight and thrust penalties. |
| Technology: | Researchers at the University of California, Irvine, have developed a novel way to eliminate Mach waves, hence a major source of noise, from the supersonic-jet exhaust. The invention modifies the flow conditions at the jet exhaust so as to prevent formation of Mach waves without causing thrust losses in a suitably-designed engine. This contrasts existing methods that try to suppress Mach waves after they are formed. |
| Application: | The invention should be of great utility to engine manufacturers and airframe builders who are working on the next generation of supersonic transports. It should also be of interest to manufacturers of military supersonic aircraft. |
| Contact: |
Demetrios Andrikos, Director, Engineering & Physical Sciences Office of Technology Alliances University of California, Irvine 380 University Tower Irvine, CA 92697-7700 Phone: (949) 824-1233 FAX: (949) 824-2899 Email: dandriko@uci.edu |
| Patent Status: | U.S. Patent No. 5,916,127 |
| UCI School: | School of Engineering |
| Department: | Mechanical & Aerospace Engineering |
