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Computational analyses of offset stream nozzles for noise reduction
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Wiese,Michael Foster, Lancert Dippold II, Vance |
| Copyright Year | 2007 |
| Description | The Wind computational fluid dynamics code was used to perform a series of simulations on two offset stream nozzle concepts for jet noise reduction. The first concept used an S-duct to direct the secondary stream to the lower side of the nozzle. The second concept used vanes to turn the secondary flow downward. The analyses were completed in preparation of tests conducted in the NASA Glenn Research Center Aeroacoustic Propulsion Laboratory. The offset stream nozzles demonstrated good performance and reduced the amount of turbulence on the lower side of the jet plume. The computer analyses proved instrumental in guiding the development of the final test configurations and giving insight into the flow mechanics of offset stream nozzles. The computational predictions were compared with flowfield results from the jet rig testing and showed excellent agreement. |
| File Size | 22321071 |
| Page Count | 31 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20120012692 |
| Archival Resource Key | ark:/13960/t0dv6hj0s |
| Language | English |
| Publisher Date | 2007-05-21 |
| Access Restriction | Open |
| Subject Keyword | Fluid Mechanics And Thermodynamics Jet Aircraft Noise Computational Fluid Dynamics Noise Reduction Plumes Computer Programs Ducted Flow Nozzle Design Nozzle Flow Turbulence Models Subsonic Flow Vanes Streamlining Secondary Flow Dual Thrust Nozzles Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
