In the frame work of the European Commission co-funded Network of Excellence HySafe (Hydrogen Safety as an Energy Carrier, www.hysafe.org), five organizations with significant experience in explosion modelling have performed numerical simulations of explosions of stochiometric hydrogen-air mixtures in a 78.5 m long tunnel. The five organizations are the Karlsruhe Research Centre, GexCon AS, the Joint Research Centre, the Kurchatov Institute Research Centre and the University of Ulster. Five CFD (Computational Fluid Dynamics) codes with different turbulence and combustion models have been used in this Standard Benchmark Exercise Problem (SBEP). Since tunnels are semi-confined environments, hydrogen explosions in tunnels can potentially be critical accident scenarios from the point of view of the accident consequences and CFD methods are increasingly employed to assess explosions hazards in tunnels. The objective of the validation exercise is to assess the accuracy of the theoretical and numerical models by comparisons of the simulation results with the experimental data. The simulation results are presented, analysed and compared to the experimental data. A very good agreement between experiments and simulations was found in terms of maximum overpressures.

BARALDI Daniele;  KOTCHOURKO Alexei;  LELYAKIN Alexander;  YANEZ Jorge;  MIDDHA Prankul;  HANSEN Olav;  GAVRIKOV Andrej;  EFIMENKO Alexander;  VERBECKE Frank;  MAKAROV Dmitriy;  MOLKOV Vladimir; 

2009-09-03

PERGAMON-ELSEVIER SCIENCE LTD

JRC50488

0360-3199,   

www.elsevier.com/locate/he,    https://publications.jrc.ec.europa.eu/repository/handle/JRC50488,   

10.1016/j.ijhydene.2009.06.055,