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CFD predictions of wake-stabilised jet flames in a cross-flow

Author

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  • Lawal, Mohammed S.
  • Fairweather, Michael
  • Gogolek, Peter
  • Ingham, Derek B.
  • Ma, Lin
  • Pourkashanian, Mohamed
  • Williams, Alan

Abstract

This study describes an investigation into predicting the major flow properties in wake-stabilised jet flames in a cross flow of air using first- and second-order turbulence models, applied within a RANS (Reynolds-averaged Navier–Stokes) modelling framework. Standard and RNG (re-normalisation group) versions of the k-ε turbulence model were employed at the first-order level and the results compared with a second-moment closure, or RSM (Reynolds stress model). The combustion process was modelled using the laminar flamelet approach together with a thermal radiation model using the discrete ordinate method. The ability of the various turbulence models to reproduce experimentally established flame appearance, profiles of velocity and turbulence intensity, as well as the combustion efficiency of such flames is reported. The results show that all the turbulence models predict similar velocity profiles over the majority of the flow domain considered, except in the wake region, where the predictions of the RSM and RNG k-ε models are in closer agreement with experimental data. In contrast, the standard k-ε model over-predicts the peak turbulence intensity. Also, it is found that the RSM provides superior predictions of the planar recirculation and flame zones attached to the release pipe in the wake region.

Suggested Citation

  • Lawal, Mohammed S. & Fairweather, Michael & Gogolek, Peter & Ingham, Derek B. & Ma, Lin & Pourkashanian, Mohamed & Williams, Alan, 2013. "CFD predictions of wake-stabilised jet flames in a cross-flow," Energy, Elsevier, vol. 53(C), pages 259-269.
    • Handle: RePEc:eee:energy:v:53:y:2013:i:c:p:259-269
    DOI: 10.1016/j.energy.2013.02.020
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    Cited by:

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    4. Tang, Fei & Hu, Peng & Shi, Congling, 2021. "Ceiling thermal impingement spread characteristics induced by wall-attached fires under various sub-atmospheric pressures," Energy, Elsevier, vol. 215(PB).

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