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The Correlation for Non-Premixed Hydrogen Jet Flame Length in Still Air

Molkov, Vladimir and Saffers, Jean-Bernard (2011) The Correlation for Non-Premixed Hydrogen Jet Flame Length in Still Air. In: 10th International Symposium on Fire Safety Science, Maryland, USA. International Association for Fire Safety Science. 11 pp. [Conference contribution]


DOI: 10.3801/IAFSS.FSS.10-933


The experimental data on the hydrogen flame length normalized by the nozzle diameter are correlated with the dimensionless product of the density ratio (hydrogen density in the nozzle exit to the density of surrounding air) and the Mach number to the power of three. The current up-to-date experimental data on hydrogen flame length are used to build the correlation that covers laminar and turbulent flows, buoyancy- and momentum-dominated releases, subsonic, sonic and highly under-expanded supersonic jets. The density and velocity of hydrogen in the nozzle are taken either directly from experiments or calculated by the under-expanded jet theory published elsewhere. The correlation is validated in the range of hydrogen storage pressures from nearly atmospheric up to 90 MPa and nozzle diameters from 0.4 to 51.7 mm. The predictive capability of this dimensionless correlation exceeds that of previously published work based on the Froude number only.

Item Type:Conference contribution (Paper)
Faculties and Schools:Faculty of Art, Design and the Built Environment
Faculty of Art, Design and the Built Environment > School of the Built Environment
Research Institutes and Groups:Built Environment Research Institute
Built Environment Research Institute > Hydrogen Safety Engineering and Research Centre (HySAFER)
ID Code:22974
Deposited By: Professor Vladimir Molkov
Deposited On:16 Aug 2012 14:11
Last Modified:09 Dec 2015 11:06

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