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Experimental study of coaxial nozzle exhaust noise. [acoustic measurements
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Goodykoontz, J. H. Stone, J. R. |
| Copyright Year | 1979 |
| Description | Experimental results are presented for static acoustic model tests of various geometrical configurations of coaxial nozzles operating over a range of flow conditions. The geometrical configurations consisted of nozzles with coplanar and non-coplanar exit planes and various exhaust area ratios. Primary and secondary nozzle flows were varied independently over a range of nozzle pressure ratios from 1.4 to 3.0 and gas temperatures from 280 to 1100 K. Acoustic data are presented for the conventional mode of coaxial nozzle operation as well as for the inverted velocity profile mode. Comparisons are presented to show the effect of configuration and flow changes on the acoustic characteristics of the nozzles. |
| File Size | 2162898 |
| Page Count | 29 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19790012658 |
| Archival Resource Key | ark:/13960/t3dz5257b |
| Language | English |
| Publisher Date | 1979-01-01 |
| Access Restriction | Open |
| Subject Keyword | Acoustics Nozzle Geometry Exhaust Velocity Variable Cycle Engines Acoustic Measurement Exhaust Nozzles Nozzle Flow Noise Reduction Noise Generators Sound Pressure Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
