Protection from thermal radiation of hazardous fires: Optimizing microscale droplet size in mist barriers using radiative transfer analysis

Hiroki Gonome, Taichi Nagao, Yuto Takagi, Mizuho Ono, Takuma Kogawa, Shuichi Moriya, Junnosuke Okajima

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

The incidence of large-scale fires continues to rise, and the effects of radiation from these fires contributes to their continued spread. Water sprays have been widely used as an effective method to contain thermal radiation from fires. Results from previous studies on the sizes of water droplets in the spray barrier have limitations due to the significant computational time or complex analytical procedure involved. The aim of this study is to determine the optimal size of water droplets in the barrier mist using radiative transfer analysis for effective shielding of the radiation from the surroundings. The radiative properties of water droplets were analyzed using the Mie scattering theory and a radiative transfer analysis of the mist layer was performed. This demonstrated that the spectral reflectance of the mist layer can be controlled by the water droplet diameter. The effectiveness of optimizing the water droplet size in the mist layer to maximize protection from thermal radiation was also validated by experiments to evaluate the radiation shielding performance of the mist barrier.

Original languageEnglish
Pages (from-to)114-120
Number of pages7
JournalProcess Safety and Environmental Protection
Volume143
DOIs
Publication statusPublished - 2020 Nov

Keywords

  • Computational method
  • Microscale droplet
  • Mist barrier
  • Radiation attenuation
  • Radiation transfer equation

ASJC Scopus subject areas

  • Environmental Engineering
  • Environmental Chemistry
  • Chemical Engineering(all)
  • Safety, Risk, Reliability and Quality

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