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3D CFD analysis of a diamond lattice-based porous burner

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  • Billerot, Pierre-Lou
  • Dufresne, Louis
  • Lemaire, Romain
  • Seers, Patrice

Abstract

Innovative 3D metal and ceramic additive printing technologies allow manufacturing porous media with a tailored design pattern, unlike the sponge-like matrices commonly used in porous media burners. Based on this technology, this paper aims at modeling, at the pore scale, the flow behavior and combustion features within a structured diamond lattice pattern offering an isotropic and homogeneous porous medium as would be printed using additive manufacturing. A low porosity, 15 pores per inch, porous medium has been tested at equivalence ratios ranging from 0.55 to 0.8. Energy analysis of the proposed 3D model showed that solid radiation losses are negligible compared to solid conduction and convection. The heat transfer analysis reveals that the energy recirculation efficiency reaches a maximum value of 82% at lean-combustion regime. At the pore scale, a symmetrical flow pattern has been observed until a critical Reynolds number of 65 is reached. Based on the flow spatial variations, dispersion has been analyzed and compared with data reported in random structures. Using a lattice structure results in a more homogeneous energy release with less temperature spatial variations. This offers the advantage of decreasing thermal constraints associated with temperature gradients which induce breakage in random structure burners.

Suggested Citation

  • Billerot, Pierre-Lou & Dufresne, Louis & Lemaire, Romain & Seers, Patrice, 2020. "3D CFD analysis of a diamond lattice-based porous burner," Energy, Elsevier, vol. 207(C).
    • Handle: RePEc:eee:energy:v:207:y:2020:i:c:s0360544220312676
    DOI: 10.1016/j.energy.2020.118160
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    References listed on IDEAS

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    1. Akbari, M.H. & Riahi, P. & Roohi, R., 2009. "Lean flammability limits for stable performance with a porous burner," Applied Energy, Elsevier, vol. 86(12), pages 2635-2643, December.
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    Cited by:

    1. Vasily B. Novozhilov & Boris V. Lidskii & Vladimir S. Posvyanskii, 2022. "Different Modes of Combustion Wave on a Lattice Burner," Mathematics, MDPI, vol. 10(15), pages 1-20, August.

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