Skip to main content

LUP Student Papers

LUND UNIVERSITY LIBRARIES

Utvärdering av tunnelbrandsmodeller

Gondinger, Johanna LU and Larsson, Alva LU (2024) In LUTVDG/TVBB VBRM01 20232
Division of Fire Safety Engineering
Abstract
The purpose of this study was to investigate the predictive capabilities of hand-calculation methods and simulations using FDS in understanding the behavior of a tunnel fire in terms of temperature and incident radiation. Additionally, the study aimed to examine the repeatability of a large-scale fire experiment. The research commenced with the execution of three similar experiments, further called test 1, 2 and 3, in a tunnel facility constructed for fire experiments. A heptane pool was used as fire source and ensuring uniform conditions for each experiment. Subsequently, the same fire scenarios were simulated using FDS, and hand-calculations. The results indicated that repeatability was generally favorable for experimental tests 2 and 3,... (More)
The purpose of this study was to investigate the predictive capabilities of hand-calculation methods and simulations using FDS in understanding the behavior of a tunnel fire in terms of temperature and incident radiation. Additionally, the study aimed to examine the repeatability of a large-scale fire experiment. The research commenced with the execution of three similar experiments, further called test 1, 2 and 3, in a tunnel facility constructed for fire experiments. A heptane pool was used as fire source and ensuring uniform conditions for each experiment. Subsequently, the same fire scenarios were simulated using FDS, and hand-calculations. The results indicated that repeatability was generally favorable for experimental tests 2 and 3, while test 1 exhibited distinctive different characteristics. One plausible explanation for this discrepancy could be that the first test desiccated the materials in the tunnel, given its prior unused state. Furthermore, only output data from tests 2 and 3 were utilized.

Hand-calculations, as a method, has proven to be time-efficient and suitable for quickly estimating tunnel temperatures. However, for more precise results where numerous parameters can be tailored to each individual experiment, hand-calculations may fall short. In summary, FDS emerges as a robust method for predicting temperatures in tunnel fires, and the results accurately reflect the input conditions. The efficacy of the FDS method is dependent on the knowledge possessed by the engineer conducting the simulation regarding fire development, influential parameters, and the complexities of the program. The more comprehensive the understanding of these elements, the more accurate the results obtained. (Less)
Please use this url to cite or link to this publication:
author
Gondinger, Johanna LU and Larsson, Alva LU
supervisor
organization
course
VBRM01 20232
year
type
M2 - Bachelor Degree
subject
keywords
Tunnelbränder, FDS, handberäkning, branddynamik, brandexperiment Tunnel fires, CFD, hand calculations, fire dynamics, fire experiment
publication/series
LUTVDG/TVBB
report number
5709
other publication id
LUTVDG/TVBB--5709--SE
language
Swedish
id
9149149
date added to LUP
2024-03-13 07:08:22
date last changed
2024-03-13 07:08:22
@misc{9149149,
  abstract     = {{The purpose of this study was to investigate the predictive capabilities of hand-calculation methods and simulations using FDS in understanding the behavior of a tunnel fire in terms of temperature and incident radiation. Additionally, the study aimed to examine the repeatability of a large-scale fire experiment. The research commenced with the execution of three similar experiments, further called test 1, 2 and 3, in a tunnel facility constructed for fire experiments. A heptane pool was used as fire source and ensuring uniform conditions for each experiment. Subsequently, the same fire scenarios were simulated using FDS, and hand-calculations. The results indicated that repeatability was generally favorable for experimental tests 2 and 3, while test 1 exhibited distinctive different characteristics. One plausible explanation for this discrepancy could be that the first test desiccated the materials in the tunnel, given its prior unused state. Furthermore, only output data from tests 2 and 3 were utilized.

Hand-calculations, as a method, has proven to be time-efficient and suitable for quickly estimating tunnel temperatures. However, for more precise results where numerous parameters can be tailored to each individual experiment, hand-calculations may fall short. In summary, FDS emerges as a robust method for predicting temperatures in tunnel fires, and the results accurately reflect the input conditions. The efficacy of the FDS method is dependent on the knowledge possessed by the engineer conducting the simulation regarding fire development, influential parameters, and the complexities of the program. The more comprehensive the understanding of these elements, the more accurate the results obtained.}},
  author       = {{Gondinger, Johanna and Larsson, Alva}},
  language     = {{swe}},
  note         = {{Student Paper}},
  series       = {{LUTVDG/TVBB}},
  title        = {{Utvärdering av tunnelbrandsmodeller}},
  year         = {{2024}},
}