2nd International Conference on Hydrogen Safety San Sebastian, September 11-13, 2007 CFD Modeling of Hydrogen Dispersion Experiments for SAEJ2578 Test Methods Development Andrei V. Tchouvelev, Jake DeVaal et al

Acknowledgement Financial Support Presented research was supported in part by Natural Resources Canada through the activities of the Codes and Standards Working Group of the Canadian Transportation Fuel Cell Alliance, by the research performers, A.V.Tchouvelev & Associates Inc. and Ballard Power Systems

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Ballard Experiments for FC Vehicles Safety Experiments Set-up / Modeling Domain

Ballard Experiments for FC Vehicles Safety Dispersion Experiments Results

CFD Modeling of Ballard Experiments Dispersion Experiments Calculations – Key Challenges Representation of moving plastic sheet Fan’s unknown swirl coefficient

CFD Modeling of Ballard Experiments Dispersion Experiments Calculations – Selected Sensors Sensor 1 Sensor 2

CFD Modeling of Ballard Experiments Dispersion Experiments Calculations – Selected Sensors Sensor 7 Sensor 8

CFD Modeling of Ballard Experiments Next Step – Ignition Experiments