Submerged Flame in Porous Media: A Numerical Study by Using FGM

Document Type : Original Article

Authors

Isfahan University of Technology

Abstract

In this study a new method for computation of reacting flow in porous media is presented, which can be considered as a combination of two existing reduced chemistry approaches i.e. the flamelet and manifold approach, to speed up flame calculations. This method, referred to as the Flamelet-Generated Manifold‎ (FGM) method, shares the idea with the flamelet approaches that a multi-dimensional flame may be considered as a set of one-dimensional flames. The thermo-chemical variables are stored in a database, which can be used in subsequent flame simulations. During flame simulation, conservation equations have to be solved for the controlling variables only. Test results of a two-dimensional methane/air flame shows that detailed chemistry computations are reproduced very well by using FGM with only one progress variable, apart from the enthalpy to account for energy losses. Using the FGM method, the computation time has been reduced several times in simulating flames, demonstrating the enormous potential of the method. Submerged flames within a porous medium simulated to show the applicability of presented method in predicting reacting flow in variable enthalpy problems. The predicted solid and gas temperatures are comparable to experiment, demonstrating the ability of the FGM method.

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References

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History

  • Receive Date: 30 September 2017
  • Revise Date: 16 December 2017
  • Accept Date: 14 February 2018

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