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Studying Transient Jet Flames by High-Resolution LES Using Premixed Flamelet Chemistry

  • E. InancEmail author
  • F. Proch
  • A. M. Kempf
Conference paper
Part of the ERCOFTAC Series book series (ERCO, volume 25)

Abstract

A transient piloted turbulent non-premixed methane jet flame approaching its blow-off limit is numerically studied by high-resolution Large-Eddy Simulations (LES). In the statistically steady jet phase, the high turbulence intensity leads to local flame extinction and re-ignition events. During the transient phase, the pulsation leads to a global flame extinction soon after the blow-off velocity is reached. The flame then re-ignites when the strain is relaxed. To model turbulent combustion with a minimum set of equations in order to reduce the computational effort, a tabulated detailed chemistry approach is tested.

Notes

Acknowledgements

The authors gratefully acknowledge the financial support by the state North Rhine-Westphalia, Germany. We thank the University of Duisburg-Essen and the Center for Computational Sciences and Simulation (CCSS) for providing time on the HPC system magnitUDE (DFG grant INST 20876/209-1 FUGG) at the Zentrum für Informations- und Mediendienste (ZIM).

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Copyright information

© Springer Nature Switzerland AG 2019

Authors and Affiliations

  1. 1.Chair of Fluid DynamicsInstitute for Combustion and Gasdynamics, University of Duisburg-EssenDuisburgGermany

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