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Model of large pool fires.

J A Fay1

  • 1Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA. jfay@mit.edu

Journal of Hazardous Materials
|January 31, 2006
PubMed
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A new two-zone model accurately predicts pool fire behavior, including flame length and fuel evaporation. This model accounts for thermal radiation and convective heat transfer, validated with large-scale LNG fire data.

Area of Science:

  • Fire Science
  • Fluid Dynamics
  • Combustion Engineering

Background:

  • Pool fires present complex fluid flow and flame dynamics.
  • Accurate modeling is crucial for safety and risk assessment.
  • Existing models may not fully capture radiative and convective heat transfer effects.

Purpose of the Study:

  • To propose a two-zone entrainment model for pool fires.
  • To develop non-dimensional scaling parameters for key fire properties.
  • To incorporate grey gas thermal radiation and convective heat transfer.

Main Methods:

  • Developed a two-zone model (combustion and plume zones).
  • Extended the model to include grey gas thermal radiation from soot.
  • Modeled convective heat transfer for evaporation rate calculations.

Related Experiment Videos

  • Validated against large-scale LNG pool fire field measurements.

    • Main Results:

    • The model provides a consistent scheme for scaling pool fire properties.
    • It accounts for both optically thin and thick radiative regions.
    • Evaporation rates were calculated for adiabatic and non-adiabatic fires.
    • Model predictions generally agree with experimental data.

    Conclusions:

    • The two-zone entrainment model effectively depicts pool fire fluid flow and flame properties.
    • The model offers a unified approach for correlating and extrapolating fire characteristics.
    • It demonstrates good agreement with experimental data for large-scale fires.