The blast wave decay correlation for hydrogen tank rupture in a tunnel fire

Research output: Contribution to journalArticle

Abstract


This study presents a universal correlation for blast wave decay after hydrogen tank rupture in a tunnel fire. The validated CFD model is applied to perform numerical experiments in tunnels of cross-section area 24-139 m2, aspect ratio width-height 1.2-2.7, tunnel length 150-1500 m with tanks of volume 15-176 L, and pressure 35-95 MPa (mass 0.6-6.9 kg). A dimensionless correlation for transition distance from Zone 1, dominated by blast wave reflections, to Zone 2 of planar wave propagation is developed. The traditional models derived using high explosives are found to be non-appropriate to describe blast wave decay after hydrogen tank rupture in a tunnel fire. Therefore, an original correlation is developed using methods of similitude analysis and numerical experiments. The mechanical and fraction of chemical energy contributing to the blast wave strength are accounted for along with effects of tunnel aspect ratio and friction/minor losses.
Original languageEnglish
Pages (from-to)31289-31302
Number of pages14
JournalInternational Journal of Hydrogen Energy
Volume45
Issue number55
Early online date30 Aug 2020
DOIs
Publication statusPublished - 6 Nov 2020

Keywords

  • Blast wave decay
  • Correlation
  • Hydrogen safety
  • Numerical experiments
  • Tank rupture
  • Tunnel

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