Un-ignited and ignited high pressure hydrogen releases: Concentration - turbulence mapping and overpressure effects

Jérôme Daubech (1) , Jérôme Hebrard (1) , Simon Jallais (2) , Elena Vyazmina (2) , Didier Jamois (1) , Franck Verbecke (3)

1 INERIS - Institut National de l'Environnement Industriel et des Risques
2 Air Liquide [Siège Social]
3 Areva SE - Areva Stockage d'Energie

Safety studies for production and use of hydrogen reveal the importance of accurate prediction of the overpressure effects generated by delayed explosions of accidental high pressure hydrogen releases. Analysis of previous experimental work demonstrates the lack of measurements of turbulent intensities and lengthscales in the flammable envelope as well as the scarceness of accurate experimental data for explosion overpressures and flame speeds. AIR LIQUIDE, AREVA STOCKAGE ENERGIE and INERIS join in a collaborative project to study un-ignited and ignited high pressure releases of hydrogen. The purpose of this work is to map hydrogen flammable envelopes in terms of concentration, velocity and turbulence, and to characterize the flame behaviour and the associated overpressure. These experimental results (dispersion and explosion) are also compared with blind FLACS modelling.

Keywords: DELAYED EXPLOSIONS; TURBULENCE; HIGH PRESSURE JET EXPLOSION; FLAME BEHAVIOUR

Domains: Environmental Sciences; Environmental Engineering

Jérôme Daubech, Jérôme Hebrard, Simon Jallais, Elena Vyazmina, Didier Jamois, et al.. Un-ignited and ignited high pressure hydrogen releases: Concentration - turbulence mapping and overpressure effects. Journal of Loss Prevention in the Process Industries, 2015, 36, pp.439-446. ⟨10.1016/j.jlp.2015.05.013⟩. ⟨ineris-01855042⟩