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Sound generation by aircraft wake vortices
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Hardin, Jay C. Wang, Frank Y. |
| Copyright Year | 2003 |
| Description | This report provides an extensive analysis of potential wake vortex noise sources that might be utilized to aid in their tracking. Several possible mechanisms of aircraft vortex sound generation are examined on the basis of discrete vortex dynamic models and characteristic acoustic signatures calculated by application of vortex sound theory. It is shown that the most robust mechanisms result in very low frequency infrasound. An instability of the vortex core structure is discussed and shown to be a possible mechanism for generating higher frequency sound bordering the audible frequency range. However, the frequencies produced are still low and cannot explain the reasonably high-pitched sound that has occasionally been observed experimentally. Since the robust mechanisms appear to generate only very low frequency sound, infrasonic tracking of the vortices may be warranted. |
| File Size | 562318 |
| Page Count | 28 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20040006312 |
| Archival Resource Key | ark:/13960/t7dr7t19d |
| Language | English |
| Publisher Date | 2003-12-01 |
| Access Restriction | Open |
| Subject Keyword | Acoustics Aircraft Wakes Sound Waves Mathematical Models Velocity Vortices Tracking Position Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
