99--TECHNOLOGY TRANSFER OPPORTUNITY ACTIVE AND CONTROLLABLE NOISE REDUCTIONSYSTEM FOR JET ENGINES

NASA Langley Research Center in Hampton, VA solicits inquiries from companies interested in obtaining license rights to commercialize, manufacture and market the following technology. License rights may be issued on an exclusive or nonexclusive basis and may include specific fields of use. NASA provides no funding in conjunction with these potential licenses. THE TECHNOLOGY: Scientists at NASA Langley Research Center have developed a noise reduction system which makes use of injectors placed on the inside trailing edge of a jet engine nozzle. The momentum of the injected water causes turbulence, much like a chevron, to induce mixing of the inner core nozzle flow with the outer flow (bypass fan stream or free stream) upon exit from the nozzle. Optimization and control of the injector noise reduction is possible through control variables such as injector angle, injector placement and distribution, injector port shape, water flow, etc. This is a significant advancement to the concept of using mechanically fixed chevrons on the trailing edge of jet engine nozzles to reduce noise. Unfortunately, the turbulence created with the chevrons, while useful for reducing noise upon takeoff, serves to reduce efficiency during cruising. The present innovation is a simple noise reduction system with effects similar to that of chevrons, yet it is active and controllable to maximize noise reduction while maintaining efficiency. This innovation has been developed and tested at NASA Langley Research Center using scale wind tunnel testing. The technology is protected under US patent application US20080078159, published April 2008. To express interest in this opportunity, please respond to contact@example.gov with the title of this Technology Transfer Opportunity as listed in this FBO notice and your preferred contact information. Please also provide the nature of your interest in the technology along with a brief background of your company. For more information about licensing other NASA-developed technologies, please visit the NASA Technology Transfer Portal at http://technology.nasa.gov/ . These responses are provided to members of NASA Langleys Office of Strategic Analysis and Business Development OSACB for the purpose of promoting public awareness of NASA-developed technology products, and conducting preliminary market research to determine public interest in and potential for future licensing opportunities. If direct licensing interest results from this posting, OSACB will follow the required formal licensing process of posting in the Federal Register. No follow-on procurement is expected to result from responses to this Notice.