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Effects of nozzle design on the noise from supersonic jets
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Maestrello, L. Norum, T. D. Seiner, J. M. |
| Copyright Year | 1980 |
| Description | The aeroacoustic supersonic performance of various internal nozzle geometries is evaluated for shock noise content over a wide range of nozzle pressure ratios. The noise emission of a Mach 1.5 and 2.0 convergent-divergent (C-D) nozzle is measured and compared to convergent nozzles. Comparisons are also made for a Mach 1.5 conical C-D nozzle and a porous plug nozzle. The Mach 1.5 conical C-D nozzle shows a small reduction in shock noise relative to the shock free case of the Mach 1.5 C-D nozzle. The Mach 1.5 C-D nozzle is found to have a wide operating nozzle pressure ratio range around its design point where shock noise remains unimportant compared to the jet mixing noise component. However it is found that the Mach 2 C-D nozzle shows no significant acoustic benefit relative to the convergent nozzle. Results from the porous plug nozzle indicate that shock noise may be completely eliminated, and the jet mixing noise reduced. |
| File Size | 2292789 |
| Page Count | 13 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19810009478 |
| Archival Resource Key | ark:/13960/t11p2wv7c |
| Language | English |
| Publisher Date | 1980-03-01 |
| Access Restriction | Open |
| Subject Keyword | Acoustics Nozzle Geometry Conical Nozzles Plug Nozzles Power Spectra Jet Aircraft Noise Noise Reduction Supersonic Cruise Aircraft Research Supersonic Nozzles Convergent-divergent Nozzles Pressure Ratio Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
