Abstract
In practical heat production systems, premixed flames with cold heat exchanger in cross-flow is a widely used configuration. Self-excited thermoacoustic instabilities often occur in such systems. A practical way to predict the presence of the instabilities is the network model approach. In the present study, the configuration flame - heat exchanger is analyzed numerically. We first analyze the system as a network of segregated elements. Based on the resulting acoustic scattering matrix, the role of the heat exchanger as an amplifier of the flame resonant frequencies will be discussed. Then, results from the 1D network modeling are compared to results of compressible numerical simulations, performed for several distances between flame and heat exchanger. Finally, the limits to the validity of the segregated network model approach are discussed.
| Original language | English |
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| Title of host publication | From Ancient to Modern Acoustic : Proceedings of the 23rd International Congress on Sound and Vibration, 10-14 July 2016, Athens, Greece |
| Publisher | International Institute of Acoustics and Vibrations |
| Number of pages | 8 |
| ISBN (Electronic) | 9789609922623 |
| DOIs | |
| Publication status | Published - 2016 |
| Event | 23rd International Congress on Sound and Vibration (ICSV 2016) - Athens, Greece Duration: 10 Jul 2016 → 14 Jul 2016 Conference number: 23 http://www.icsv23.org/ |
Conference
| Conference | 23rd International Congress on Sound and Vibration (ICSV 2016) |
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| Abbreviated title | ICSV 2016 |
| Country | Greece |
| City | Athens |
| Period | 10/07/16 → 14/07/16 |
| Internet address |