Combustion Noise

1. Front Matter

   Pages i-xv

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2. Numerical RANS/URANS simulation of combustion noise

   • Bernd Mühlbauer, Berthold Noll, Roland Ewert, Oliver Kornow, Manfred Aigner

   Pages 1-31

3. Measurement and Simulation of Combustion Noise emitted from Swirl Burners

   • C. Bender, F. Zhang, P. Habisreuther, H. Büchner, H. Bockhorn

   Pages 33-62

4. Modeling of noise sources in combustion processes via Large-Eddy Simulation

   • Anna Schwarz, Felix Flemming, Martin Freitag, Johannes Janicka

   Pages 63-88

5. Modelling of the Sound Radiation from Flames by means of Acoustic Equivalent Sources

   • Rafael Piscoya, Haike Brick, Martin Ochmann, Peter Költzsch

   Pages 89-123

6. Investigation of the Correlation of Entropy Waves and Acoustic Emission in Combustion Chambers

   • Friedrich Bake, André Fischer, Nancy Kings, Ingo Röhle

   Pages 125-146

7. Influence of boundary conditions on the noise emission of turbulent premixed swirl flames

   • Fabian Weyermann, Christoph Hirsch, Thomas Sattelmayer

   Pages 147-174

8. Theoretical and Numerical Analysis of Broadband Combustion Noise

   • Thanh Phong Bui, Wolfgang Schröder

   Pages 175-215

9. Investigations Regarding the Simulation of Wall Noise Interaction and Noise Propagation in Swirled Combustion Chamber Flows

   • Christoph Richter, Łukasz Panek, Verina Krause, Frank Thiele

   Pages 217-238

10. Direct Numerical Simulations of turbulent flames to analyze flame/acoustic interactions

    • G. Fru, H. Shalaby, A. Laverdant, C. Zistl, G. Janiga, D. Thévenin

    Pages 239-268

11. Localization of Sound Sources in Combustion Chambers

    • Christian Pfeifer, Jonas P. Moeck, C. Oliver Paschereit, Lars Enghardt

    Pages 269-291

12. Back Matter

    Pages 1-1

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November, 2008 Anna Schwarz, Johannes Janicka In the last thirty years noise emission has developed into a topic of increasing importance to society and economy. In ?elds such as air, road and rail traf?c, the control of noise emissions and development of associated noise-reduction techno- gies is a central requirement for social acceptance and economical competitiveness. The noise emission of combustion systems is a major part of the task of noise - duction. The following aspects motivate research: • Modern combustion chambers in technical combustion systems with low pol- tion exhausts are 5 - 8 dB louder compared to their predecessors. In the ope- tional state the noise pressure levels achieved can even be 10-15 dB louder. • High capacity torches in the chemical industry are usually placed at ground level because of the reasons of noise emissions instead of being placed at a height suitable for safety and security. • For airplanes the combustion emissions become a more and more important topic. The combustion instability and noise issues are one major obstacle for the introduction of green technologies as lean fuel combustion and premixed burners in aero-engines. The direct and indirect contribution of combustion noise to the overall core noise is still under discussion. However, it is clear that the core noise besides the fan tone will become an important noise source in future aero-engine designs. To further reduce the jet noise, geared ultra high bypass ratio fans are driven by only a few highly loaded turbine stages.

• Acoustic Emission
• Burners
• Combustion Chamber Flows
• combustion
• entropy
• modeling
• noise
• radiation
• simulation
• sound
• swirl flames
• wave

• FG Energie- und Kraftwerkstechnik, TU Darmstadt, Darmstadt, Germany

  Anna Schwarz

• FB 16 Maschinenbau, TU Darmstadt, Darmstadt, Germany

  Johannes Janicka

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