Abstract
The fluctuating field of a heated jet excited by a sound pulse is simulated numerically. The fluctuations in both the flow field and the far field are studied. The flow field results depend crucially on the stability properties of the heated jet. The altered stability properties due to the heating cause a reduction in the overall fluctuations and a shift of the instability waves into lower frequencies. These changes cause a similar downward shift in the far field spectrum and a reduction in the total far field noise. The results provide a partial explanation in terms of stability theory of experimentally observed properties of the noise of heated jets.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 395-409 |
| Number of pages | 15 |
| Journal | Journal of Sound and Vibration |
| Volume | 86 |
| Issue number | 3 |
| DOIs | |
| State | Published - Feb 8 1983 |
Funding
t This work was partially supported under NASA Contracts No. NASl-14472 and NASl-15810 while the first author was in residence at the Institute for Computer Applications in Science and Engineering, NASA Langley Research Center, Hampton, Virginia 23665. Additional support for the first author was provided by Air Force Contract No. AFOSR-76-2881 and U.S. DEC Contract No. DE-ACOL-76ER03077.
ASJC Scopus subject areas
- Condensed Matter Physics
- Mechanics of Materials
- Acoustics and Ultrasonics
- Mechanical Engineering