Journal article

Reduced chemistry for sound generation by planar annihilation in premixed methane/hydrogen flames

Jen Zen Ho, Mohsen Talei, Robert L Gordon, Michael J Brear

Proceedings of the Combustion Institute | ELSEVIER SCIENCE INC | Published : 2021

Abstract

Sound generation by planar flame annihilation for methane/hydrogen/air premixed flames was studied using one-dimensional fully-resolved simulations. The Foundational Fuel Chemistry Model (FFCM) was employed to perform the simulations for different initial pressures and temperatures, for volumetric mixtures of 0-100% hydrogen in the fuel mixture. For cases with 25-80% of hydrogen in the fuel mixture three stages of annihilation were observed. The first stage showed a gradual flame extinction coupled with the generation of a pressure wave with a long wavelength. The second stage featured a more rapid extinction as the flame accelerates towards the symmetry axis, producing a sharp pressure drop..

View full abstract

Grants

Awarded by Australian Research Council through the DECRA Fellowship


Funding Acknowledgements

This work is funded by the Future Fuels CRC, supported through the Australian Governments Cooperative Research Centres Program. The cash and inkind support from the industry participants is gratefully acknowledged. Mohsen Talei acknowledges the support of the Australian Research Council through the DECRA Fellowship (DE180100416) . The authors also acknowledge the generous support of the European Centre for Research and Advanced Training in Scientific Computation (CERFACS, http:// www.cerfacs.fr) , in providing the authors with the source code for NTMIXCHEMKIN. In particular, the authors thank Dr. Benedicte Cuenot for her help with this code. This research was undertaken with the assistance of resources and services from the National Computational Infrastructure (NCI) , the Pawsey Supercomputing Centre, with funding from the Australian Government and the Government of Western Australia.