10.1186/2251-6832-3-22

Influence of turbulent mixing intensity on the MILD combustion and the pollutant formation

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  • Hamdi Mohamed*1,
  • Bentîcha Hmaeid1,
  1. Laboratoire d'Etudes des Systèmes Thermiques et Energétique, Ecole Nationale d'Ingénieurs de Monastir, University of Monastir, Monastir, 5000, TN
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Published in Issue 2012-09-18

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Mohamed, H., & Hmaeid, B. (2012). Influence of turbulent mixing intensity on the MILD combustion and the pollutant formation. International Journal of Energy and Environmental Engineering, 3(1 (December 2012). https://doi.org/10.1186/2251-6832-3-22
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Abstract

Abstract Moderate or intense low-oxygen dilution (MILD) combustion has been acknowledged as one of the most interesting combustion technologies to meet both the targets of high process efficiency and low pollutant emissions. Therefore, the potential for its implementation in gas turbine combustors is investigated in recent research activities. In the MILD combustion regime, we find that the characteristic times of kinetics and turbulence become comparable and the two phenomena are coupled with each other. In this work, a partially stirred reactor is applied to investigate the influence of the turbulent mixing intensity on the combustion process as well as its impact on NO x formation. The proposed model is based on a combination of simple turbulent mixing approach with a detailed chemistry sub-model for methane oxidation and NO x formation. The computational results demonstrate that the combustion processes as well as the pollutant formation are very sensitive to the mixing intensity. However, the total NO x emissions after complete combustion are seen to be only slightly influenced by the mixing intensity.

Keywords

  • MILD combustion,
  • Turbulent mixing intensity,
  • Gas turbine combustion,
  • Pollutant formation,
  • NOx emissions
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