Fatih EKER, İlker YILMAZ

2814

Numerical modeling of the momentum, heat transfer and combustion mechanisms of the non-premixed swirling flame inside a cylindrical combustor

This study presents a numerical investigation of the momentum, heat transfer, and combustion mechanisms of a cylindrical combustion chamber's non-premixed swirling flame motion. Fluent, a commercial CFD software, has been used in calculations. Scenarios created with different turbulence models, combustion models, and reaction mechanisms have been compared with the experimental results. The realizable k-epsilon model in the turbulence modeling study and FR/EDM-4 step combination in the combustion modeling study has presented the most impressive results for reacting flow. The Realizable k-epsilon model is promising in that it is most compatible with the experimental results. The Finite Rate/Eddy Dissipation model employed with the 4-step reaction mechanism has provided much more reliable results than other scenarios, especially the Flamelet model used with a detailed chemical mechanism. Realizable k-epsilon and FR/EDM-4 step combination have increased the capacity to predict the reaction flow, resulting in better accuracy. In addition, the effect of radiation heat transfer on the temperature field has been investigated. As a result, the scenario with radiation conducted employing the Discrete Ordinates (DO) model has presented more realistic results than the scenario without radiation. Finally, the effects of different turbulent Scmidth numbers on velocity and temperature fields have been investigated. While the turbulent Schmidt number has not caused significant changes in the velocity field, it has proved critical for the temperature field, and processing it as 0.7 has demonstrated much more accurate results.
Keywords:

Combustion modeling, Turbulence, Non-premixed flames, Combustion engineering, Radiation heat transfer, Combustion modeling, Turbulence, Non-premixed flames Combustion engineering, Radiation heat transfer,

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International Journal of Energy Studies-Cover
  • Yayın Aralığı: Yılda 4 Sayı
  • Başlangıç: 2016
  • Yayıncı: Türkiye Enerji Stratejileri ve Politikaları Araştırma Merkezi (TESPAM)
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