Abstract
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 language | English |
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Pages (from-to) | 463-474 |
Number of pages | 12 |
Journal | Combustion and Flame |
Volume | 132 |
Issue number | 3 |
DOIs | |
Publication status | Published - 1 Feb 2003 |
Keywords
- Fires
- Jets
- Mathematical modeling
- Sonic flow