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Numerical investigation behavior of reacting flow for flameless oxidation technology of MILD combustion: Effect of fluctuating temperature of inlet co-flow

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  • Jozaalizadeh, Toomaj
  • Toghraie, Davood

Abstract

To grow the knowledge to the moderate or intense low-oxygen dilution combustion, namely MILD combustion, the present paper examines the CH4H2 MILD combustion under various working conditions in a jet in hot coflow burner which called Dally burner using a finite volume code. This burner can produce MILD combustion regime in the upstream and conventional combustion regime in the downstream. For this end, detailed reaction mechanism (GRI-Mech 2.11), the k-ε RNG by the kinetic energy of turbulence of 53 m2/s2 for fuel inlet and 3 m2/s2 for hot coflow inlet as well as the eddy dissipation concept model for treating the interaction between the turbulence and the chemistry in flames are used. At first, the results are compared with the experimental data and after validating the results of the solution obtained, the MILD combustion is investigated by using sinusoidal pattern temperature between 1580 K and 1180 K, respectively. The results show that by using fluctuation temperature of inlet co-flow, the MILD combustion regime develop in a wider area. reaction zone and the release energy have increased during the initial oscillation at the incoming temperature, and along with this amount of Water vapor and CO2 have increased, while the amount of CO has also been slightly reduced.

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  • Jozaalizadeh, Toomaj & Toghraie, Davood, 2019. "Numerical investigation behavior of reacting flow for flameless oxidation technology of MILD combustion: Effect of fluctuating temperature of inlet co-flow," Energy, Elsevier, vol. 178(C), pages 530-537.
    • Handle: RePEc:eee:energy:v:178:y:2019:i:c:p:530-537
    DOI: 10.1016/j.energy.2019.04.198
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