Abstract
In light of stricter emission regulations for aeroengines, the lean premixed combustion regime has received a renewed attention in recent years. This operation mode, however, is prone to thermoacoustic instabilities and requires careful consideration during the design process which involves the identification of frequencies of interest for a given burner. In this paper, the analysis of a detached eddy simulation (DES) of a prefilming airblast swirl burner is considered. Fast Fourier transform (FFT), Proper Orthogonal Decomposition (POD) and Wavelet transform are among the various techniques discussed and investigated in order to identify predominant frequencies in timeseries of variables of concern. The results highlight the strength of each approach and a comparison between the considered techniques is presented.
| Original language | English |
|---|---|
| Title of host publication | 28th International Congress on Sound and Vibration, ICSV 2022 |
| Subtitle of host publication | Singapore 24-28 July 2022, Proceedings |
| Publisher | Romanian Society of Acoustics |
| Pages | 775-781 |
| Volume | 1 |
| ISBN (Electronic) | 978-9-8118-5070-7 |
| ISBN (Print) | 978-1-7138-6704-3 |
| Publication status | Published - 2022 |
| Event | 28th International Congress on Sound and Vibration, ICSV 2022 - Singapore, Singapore Duration: 24 Jul 2022 → 28 Jul 2022 Conference number: 28 |
Publication series
| Name | Proceedings of the International Congress on Sound and Vibration |
|---|---|
| Publisher | International Institute of Acoustics and Vibration (IIAV) |
| Number | 28 |
| Volume | 2022 |
| ISSN (Electronic) | 2329-3675 |
Conference
| Conference | 28th International Congress on Sound and Vibration, ICSV 2022 |
|---|---|
| Abbreviated title | ICSV 2022 |
| Country/Territory | Singapore |
| City | Singapore |
| Period | 24/07/22 → 28/07/22 |
Keywords
- Airblast atomizer
- Non-premixed combustion
- Proper orthogonal decomposition (POD)
- Thermoacoustic instability
- Wavelets