Abstract
Results of an ongoing effort to quantify the role turbulence in scattering sound in jets are reported. Using a direct numerical simulation database to providethe flow data, ray paths traced through the mean flow are compared with those traced through the actual time dependent turbulent flow. Significant scattering by the turbulence is observed. The most notable effect is that upstream traveling waves that are trapped in the potential core by the mean flow, which acts as a wave guide, easily escape in the turbulent flow. A crude statistical estimate based on ray number density suggests that directivity is modified substantially by the turbulence, but no rigorous treatment of non-uniformities in the high-frequency approximation is attempted.
| Original language | English (US) |
|---|---|
| DOIs | |
| State | Published - 2001 |
| Externally published | Yes |
| Event | 39th Aerospace Sciences Meeting and Exhibit 2001 - Reno, NV, United States Duration: Jan 8 2001 → Jan 11 2001 |
Other
| Other | 39th Aerospace Sciences Meeting and Exhibit 2001 |
|---|---|
| Country/Territory | United States |
| City | Reno, NV |
| Period | 1/8/01 → 1/11/01 |
ASJC Scopus subject areas
- Space and Planetary Science
- Aerospace Engineering