Elshimy_2020_IOP_Conf._Ser.__Mater._Sci._Eng._973_012007.pdf (856.28 kB)

Numerical studies of turbulent premixed flame interaction with repeated solid obstacles

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conference contribution
posted on 18.11.2020, 14:05 by Mohamed Elshimy, Salah Ibrahim, Weeratunge Malalasekera
This paper presents numerical simulations of hydrogen and propane turbulent premixed flames interaction with repeated solid obstructions. The laboratory-scale combustion chamber used in this study is equipped with three solid baffles which promote the generation of turbulence and a square obstacle located downstream from the ignition source. The test cases considered have two different area blockage ratios (ABR) of 24% and 50%, respectively. The large eddy simulation (LES) turbulence modelling technique is used. The numerical simulations are carried out using an in-house computational fluid dynamics (CFD) model. Two different flow configurations are examined, both using three consecutive baffles to identify the subsequent effects and the sensitivity of each fuel to increasing the ABR. These effects are studied using the nature of the flame-obstacles interaction, generated combustion overpressure and resultant flame speed. The modelling capability is confirmed by validating the numerical results against published experimental data. Conclusions are drawn that increasing the ABR increases the combustion overpressure, rate of pressure rise and flame speed. It is also concluded that the larger obstacle has a significant effect on the propagating flame structure and that hydrogen flames are more sensitive to an increased ABR and produce a significantly higher peak overpressure.

History

School

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

Department

  • Aeronautical and Automotive Engineering

Published in

IOP Conference Series: Materials Science and Engineering

Volume

973

Source

19th International Conference on Applied Mechanics and Mechanical Engineering (AMME-19)

Publisher

IOP Publishing Ltd

Version

VoR (Version of Record)

Rights holder

© The Authors

Publisher statement

This is an Open Access Article. It is published by IOP Publishing Ltd under the Creative Commons Attribution 3.0 Unported Licence (CC BY 3.0). Full details of this licence are available at: https://creativecommons.org/licenses/by/3.0/

Acceptance date

01/11/2019

Publication date

2020-11-17

Copyright date

2020

ISSN

1757-8981

eISSN

1757-899X

Language

en

Location

Virtual

Event dates

7th July 2020 - 9th July 2020

Depositor

Mr Mohamed Elshimy. Deposit date: 31 July 2020

Article number

012007

Licence

Exports