Abstract
Acoustic response and stability of swirl burners operating in lean conditions is of great interest considering the stricter emission regulations. Lean operating modes exhibit a heightened sensitivity to thermoacoustic instability. This paper is aimed at understanding the natural acoustic characteristic of a prefilming Airblast atomizer operating at pressurized conditions. The presence of a helical precessing vortex core and its corresponding frequency as well as the natural fluctuations in the turbulent reactive flow is simulated using a large eddy simulation approach. Proper orthogonal decomposition is used to extract the prominent flow structures and infer their associated time dynamics within the swirl burner. This analysis is performed in absence of any external forcing to the system and can provide some insight into the stable operating modes of the swirl atomizer.
Original language | English |
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Title of host publication | "Advances in Acoustics, Noise and Vibration - 2021" Proceedings of the 27th International Congress on Sound and Vibration, ICSV 2021 |
Editors | Eleonora Carletti, Malcolm Crocker, Marek Pawelczyk, Jiri Tuma |
Publisher | Silesian University Press |
ISBN (Electronic) | 9788378807995 |
Publication status | Published - 2021 |
Event | 27th International Congress on Sound and Vibration, ICSV 2021 - Virtual, Online Duration: 11 Jul 2021 → 16 Jul 2021 Conference number: 27 |
Conference
Conference | 27th International Congress on Sound and Vibration, ICSV 2021 |
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Abbreviated title | ICSV 2021 |
City | Virtual, Online |
Period | 11/07/21 → 16/07/21 |
Keywords
- Airblast atomizer
- Non-premixed turbulent combustion
- Proper orthogonal decomposition
- Thermoacoustic instability