Title: IA-Hysafe Standard Benchmark Exercise SBEP-V21: Hydrogen Release and Accumulation within a Non-Ventilated Ambient Pressure Garage at Low Release Rates
Citation: Proceedings of the 4th International Conference on Hydrogen Safety (ICHS) 2011 p. 1-14
Publisher: IA-HySafe, University di Pisa, Sandia National Laboratories
Publication Year: 2011
JRC N°: JRC63040
URI: http://ichs2011.com/
Type: Articles in periodicals and books
Abstract: The successful Computational Fluid Dynamics (CFD) benchmarking activity, originally started within the EC-funded Network of Excellence HySafe (2004-2009), continues within the research topics of the recently established “International Association of Hydrogen Safety” (IA-HySafe). The present contribution reports the results of the standard benchmark problem SBEP-V21. Focus is given to hydrogen dispersion and accumulation within a non-ventilated ambient pressure garage both during the release and post-release periods but for very low release rates as compared to earlier work (SBEP-V3). The current experiments were performed by CEA at the GARAGE facility under highly controlled conditions. Helium was vertically released from the centre of the 5.76 m (length) x 2.96 m (width) x 2.42 m (height) facility, 22 cm from the floor, from a 29.7 mm diameter opening at a volumetric rate of 18 L/min (0.027 g/s equivalent hydrogen release rate compared to 1 g/s for SBEP-V3) and for a period of 3740 seconds. Helium concentrations were measured with 57 catharometric sensors at various locations for a period up to 1.1 days. The simulations were performed using a variety of CFD codes and turbulence models. The paper compares the results predicted by the participating partners and attempts to identify the reasons for any observed disagreements.
JRC Directorate:Nuclear Safety and Security

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