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Interpretation of Fire Safety Distances of a Minivan Passenger Car by Burning Behaviors Analysis

  • Yue Hu
  • Xiaodong Zhou
  • Junda Cao
  • Liang Zhang
  • Gang Wu
  • Lizhong YangEmail author
Original Paper
  • 32 Downloads

Abstract

In a car fire, thermal radiation poses a major threat to people and adjacent cars. Thus, estimations of fire safety distances are of great significance for the evacuation assignment and parking lot design. In the present full-scale experiment of a minivan car fire, the left cooling fan in the engine compartment was ignited as the origin of fire. The burn down of front bumper and windows markedly affected the fire intensity in engine and passenger compartment respectively. In the burning process, the peak heat release rate reached maximum value of 3.38 MW when gasoline leaked out. The flame model was assumed to be a superposition of several cuboids for the estimation of view factors of the fire. The average radiative fractions in the intense burning phases of engine and passenger compartments were first determined as 0.469 and 0.589, respectively, based on the burning behavior analysis. The resulting values allowed for the determination of thermal radiation in spatial positions and fire safety distances in the lateral side of the car for people and adjacent cars, which was an extension of previous researches of considering only the thermal radiation in certain positions. The calculation results of thermal radiation were in good agreement with the previous experimental data. The fire safety distances in the lateral direction of the car for people without protection and adjacent cars in this study, as examples, were about 7.3 m and 2.1 m respectively under threshold values of heat fluxes.

Keywords

Minivan passenger car fire Burning behaviors Fire safety distance Fire spread Thermal radiation hazard 

Notes

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2020

Authors and Affiliations

  • Yue Hu
    • 1
  • Xiaodong Zhou
    • 1
  • Junda Cao
    • 1
  • Liang Zhang
    • 2
  • Gang Wu
    • 1
  • Lizhong Yang
    • 1
    Email author
  1. 1.State Key Laboratory of Fire ScienceUniversity of Science and Technology of ChinaHefeiChina
  2. 2.Tianjin Fire Research Institute of MEMTianjinChina

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