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Worst Case Scenario for Delayed Explosion of Hydrogen Jets at a High Pressure: Ignition Position

Abstract : Delayed explosion of free field hydrogen releases at a high pressure is subject of multiple investigation performed by various authors in the past years. These studied considered various parameters such as pressures, flow rates etc., and their influence on the resulting overpressure. However, the influence of the ignition position on the maximum overpressure was not fully explored. Current investigation addressed by computational fluid dynamics (CFD) simulations and experimental measurement fills this gap. This work demonstrates that the ignition positions corresponding to 55%-65% of H2/air mixture give the maximum overpressure. This observation initially observed numerically and afterword confirmed experimentally. A simple model is also suggested.
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https://hal-ineris.archives-ouvertes.fr/ineris-03499559
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Submitted on : Tuesday, December 21, 2021 - 2:36:44 PM
Last modification on : Wednesday, December 22, 2021 - 3:01:20 AM

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  • HAL Id : ineris-03499559, version 1

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Elena Vyazmina, Jérôme Daubech, Jérôme Hébrard, Laura Gastaldo, S. Jallais. Worst Case Scenario for Delayed Explosion of Hydrogen Jets at a High Pressure: Ignition Position. 9th International conference on hydrogen safety (ICHS 2021), Sep 2021, Edinburgh, United Kingdom. pp.702-709. ⟨ineris-03499559⟩

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