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LES-DFSD studies of lean-burn turbulent premixed hydrogen flames

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conference contribution
posted on 2021-06-21, 09:15 authored by Mohamed Elshimy, Salah Ibrahim, Weeratunge MalalasekeraWeeratunge Malalasekera
Large eddy simulation (LES) based turbulence modelling technique may face challenges when employed to predict turbulent reacting flows. The Dynamic Flame Surface Density (DFSD) model for turbulent premixed combustion applied in this research adapts to produce accurate results based on the information obtained from transient flames. A LES – DFSD model has been developed and validated against experimental data for lean-burn premixed hydrogen flames propagating past repeated obstacles and a solid obstruction of varied area blockage ratio (ABR). The rate of pressure rise, peak overpressure magnitude, flame speed and other flame characteristics have been successfully reproduced numerically for flow configurations. It was found that having a combustion filter-width which is 6 to 7 times the smallest computational grid cell size produced the best overpressure and flame speed results. The numerical results from the LES – DFSD co-simulations produced good agreement with available experimental data.

History

School

  • Aeronautical, Automotive, Chemical and Materials Engineering
  • Mechanical, Electrical and Manufacturing Engineering

Department

  • Aeronautical and Automotive Engineering

Published in

Proceedings of ICFD14

Source

Fourteenth International Conference of Fluid Dynamics (ICFD14)

Publisher

International Conference of Fluid Dynamics (ICFD)

Version

  • VoR (Version of Record)

Rights holder

© ICFD14

Publisher statement

This paper appears here with the permission of the publisher.

Copyright date

2021

Other identifier

ICFD14-EG-7022

Language

  • en

Location

Fairmont Nile City Hotel, Cairo, Egypt

Event dates

2nd April 2021 - 3rd April 2021

Depositor

Mohamed Elshimy. Deposit date: 19 June 2021

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