Predictions of free jet fires from high pressure, sonic releases

R. P. Cleaver, P. S. Cumber, M. Fairweather

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23 Citations (Scopus)


A numerical model for predicting jet fires resulting from high pressure, sonic releases of natural gas is described. The model is based on solutions of the density-weighted forms of the fluid flow equations. It is capable of accurately resolving the near-field shock structure that occurs in these flows through the use of a compressibility corrected version of the k-e turbulence model, and also includes sub-models for the flame lift-off height and a prescribed probability density function/laminar flamelet model of the turbulent non-premixed combustion process. Radiation heat transfer is described using an adaptive version of the discrete transfer method, with solutions of the radiation heat transfer equation obtained using a statistical narrow band approach. The complete model is demonstrated to yield plausible predictions of the structure of both the near-field non-reacting and subsonic combusting zones within wind blown fires, and to provide realistic predictions of flame lift-off heights, mean temperatures, trajectories and the radiation fluxes received about a number of field-scale jet fires. © 2003 The Combustion Institute. All rights reserved.

Original languageEnglish
Pages (from-to)463-474
Number of pages12
JournalCombustion and Flame
Issue number3
Publication statusPublished - 1 Feb 2003


  • Fires
  • Jets
  • Mathematical modeling
  • Sonic flow


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