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

Vladimir Molkov, Jean-Bernard Saffers

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

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.
LanguageEnglish
Title of host publicationUnknown Host Publication
Pages933-943
Number of pages11
DOIs
Publication statusPublished - 2011
Event10th International Symposium on Fire Safety Science - Maryland, USA
Duration: 1 Jan 2011 → …

Conference

Conference10th International Symposium on Fire Safety Science
Period1/01/11 → …

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nozzles
air
hydrogen
flames
Froude number
laminar flow
buoyancy
Mach number
turbulent flow
momentum
products

Cite this

Molkov, Vladimir ; Saffers, Jean-Bernard. / The Correlation for Non-Premixed Hydrogen Jet Flame Length in Still Air. Unknown Host Publication. 2011. pp. 933-943
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abstract = "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.",
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year = "2011",
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Molkov, V & Saffers, J-B 2011, The Correlation for Non-Premixed Hydrogen Jet Flame Length in Still Air. in Unknown Host Publication. pp. 933-943, 10th International Symposium on Fire Safety Science, 1/01/11. https://doi.org/10.3801/IAFSS.FSS.10-933

The Correlation for Non-Premixed Hydrogen Jet Flame Length in Still Air. / Molkov, Vladimir; Saffers, Jean-Bernard.

Unknown Host Publication. 2011. p. 933-943.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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AU - Saffers, Jean-Bernard

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AB - 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.

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