- Author
- Fransson, C. | Vilselius, H.
- Title
- Application of a General-Purpose CFD Code to Field Modelling of Tunnel Fires.
- Coporate
- National Defence Research Establishment, Sundbyberg, Sweden
- Report
- FOA Report B 20131-2.7, June 1994, 23 p.
- Keywords
- tunnels | fire simulation | fire tests | petroleum | railroads | turbulent combustion | radiative heat transfer | experiments
- Identifiers
- Computational fluid Dynamics (CFD); field modelling; underground facility
- Abstract
- Field modelling techniques are used at FOA to simulate the environment in underground facilities as a consequence of a fire. Here results will be reported from a study where a general-purpose CFD code, FLUENT, is used for three-dimensional steady-state predictions of two large-scale petroleum fire tests in a railway tunnel. Mixing-controlled, one-step turbulent combustion and radiative heat transfer are taken into account in the calculations. The agreement between predictions and experiments is reasonable at most of the measurement stations, but close to the fire large deviations are found. Calculations using higher order numerical schemes, a better grid resolution near the fire and wall functions adjusted for the presence of real walls with rough surfaces may improve the accuracy of the predictions.