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| Content Provider | The American Society of Mechanical Engineers (ASME) Digital Collection |
|---|---|
| Author | Zahn, Max Betz, Michael Schulze, Moritz Hirsch, Christoph Sattelmayer, Thomas |
| Copyright Year | 2017 |
| Abstract | A numerical modeling approach based on linearized Euler equations is applied to predict the linear stability of an annular combustor with and without dampers. The acoustic properties of all relevant combustor components such as damping devices, swirl burner characteristics, swirl flame dynamics, and combustor exit are individually evaluated via experimental and numerical approaches. All of the components are incorporated subsequently into the combustor model using impedances and acoustic transfer matrices to obtain an efficient procedure. This study focuses on using this approach to predict an annular combustor’s stability margin and to assess how dampers influence the modal dynamics of the first azimuthal mode. Stability predictions are successfully validated with experimental data. Different combustor components’ contributions to the acoustic damping of the entire system is also determined based on that numerical approach. Damper application in combustors can engender uncertainties in resonance frequency in the case of hot-gas ingestion. The impact of “detuned” resonators on the predicted damping rates with respect to a deviation in the resonance frequency and the eigenfrequency of the attenuated acoustic mode is therefore evaluated. The influence of dampers on the annular combustor’s stability margin is also determined. |
| Sponsorship | International Gas Turbine Institute |
| File Format | |
| ISBN | 9780791850848 |
| DOI | 10.1115/GT2017-64238 |
| Volume Number | Volume 4A: Combustion, Fuels and Emissions |
| Conference Proceedings | ASME Turbo Expo 2017: Turbomachinery Technical Conference and Exposition |
| Language | English |
| Publisher Date | 2017-06-26 |
| Publisher Place | Charlotte, North Carolina, USA |
| Access Restriction | Subscribed |
| Subject Keyword | Damping Flames Uncertainty Stability Dampers Computer simulation Dynamics (mechanics) Acoustics Resonance Acoustical properties Combustion chambers |
| Content Type | Text |
| Resource Type | Article |
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