Thermal radiation from cryogenic hydrogen jet fires

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

The thermal hazards from ignited under-expanded cryogenic releases are not yet fully understood and reliable predictive tools are missing. This study aims at validation of a CFD model to simulate flame length and radiative heat flux for cryogenic hydrogen jet fires. The simulation results are compared against the experimental data by Sandia National Laboratories on cryogenic hydrogen fires from storage with pressure up to 5 bar abs and temperature in the range 48-82 K. The release source is modelled using the Ulster's notional nozzle theory. The problem is considered as steady-state. Three turbulence models were applied, and their performance was compared. The realizable k-ε model showed the best agreement with experimental flame length and radiative heat flux. Therefore, it has been employed in the CFD model along with Eddy Dissipation Concept for combustion and Discrete Ordinates (DO) model for radiation. A parametric study has been conducted to assess the effect of selected numerical and physical parameters on the simulations capability to reproduce experimental data. DO model discretisation is shown to strongly affect simulations, indicating 10 10 as minimum number of angular divisions to provide a convergence. The simulations have shown sensitivity to experimental parameters such as humidity and exhaust system volumetric flow rate, highlighting the importance of accurate and extended publication of experimental data to conduct precise numerical studies. The simulations correctly reproduced the radiative heat flux from cryogenic hydrogen jet fire at different locations.
LanguageEnglish
Pages8874-8885
Number of pages12
JournalInternational Journal of Hydrogen Energy
Volume44
Issue number17
Early online date28 Sep 2018
DOIs
Publication statusPublished - 2 Apr 2019

Fingerprint

Heat radiation
thermal radiation
Cryogenics
cryogenics
Fires
Hydrogen
hydrogen
Heat flux
heat flux
charge flow devices
simulation
flames
Computational fluid dynamics
exhaust systems
turbulence models
Turbulence models
hazards
nozzles
division
humidity

Keywords

  • CFD, jet fire, cryogenic, hydrogen, radiative heat transfer
  • CFD
  • Cryogenic
  • Hydrogen
  • Jet fire
  • Radiative heat transfer

Cite this

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title = "Thermal radiation from cryogenic hydrogen jet fires",
abstract = "The thermal hazards from ignited under-expanded cryogenic releases are not yet fully understood and reliable predictive tools are missing. This study aims at validation of a CFD model to simulate flame length and radiative heat flux for cryogenic hydrogen jet fires. The simulation results are compared against the experimental data by Sandia National Laboratories on cryogenic hydrogen fires from storage with pressure up to 5 bar abs and temperature in the range 48-82 K. The release source is modelled using the Ulster's notional nozzle theory. The problem is considered as steady-state. Three turbulence models were applied, and their performance was compared. The realizable k-ε model showed the best agreement with experimental flame length and radiative heat flux. Therefore, it has been employed in the CFD model along with Eddy Dissipation Concept for combustion and Discrete Ordinates (DO) model for radiation. A parametric study has been conducted to assess the effect of selected numerical and physical parameters on the simulations capability to reproduce experimental data. DO model discretisation is shown to strongly affect simulations, indicating 10 10 as minimum number of angular divisions to provide a convergence. The simulations have shown sensitivity to experimental parameters such as humidity and exhaust system volumetric flow rate, highlighting the importance of accurate and extended publication of experimental data to conduct precise numerical studies. The simulations correctly reproduced the radiative heat flux from cryogenic hydrogen jet fire at different locations.",
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Thermal radiation from cryogenic hydrogen jet fires. / Cirrone, Donatella Maria Chiara; Makarov, DV; Molkov, Vladimir.

Vol. 44, No. 17, 02.04.2019, p. 8874-8885.

Research output: Contribution to journalArticle

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T1 - Thermal radiation from cryogenic hydrogen jet fires

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