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CFD Analysis of Fire Testing of Automotive Hydrogen Gas Cylinders with Substitutive Gases
Technical Paper
2005-01-1887
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
To investigate methods of conducting flame exposure tests (bonfire tests) on high-pressure hydrogen gas cylinders that are safe and have high accuracy across repeated tests, we used numerical simulation and experiments to analyze the feasibility of using substitutive gases for filling as well as the effects of the burners used as the fire source. Through a series of virtual experiments using substitutive gases, flame scales, and filling pressure as parameters, we examined the maximum internal pressure, the rate of pressure rise, and the starting time of Pressure Relief Device (PRD) activation.
Because substitutive gas properties differ from those of hydrogen gas, we concluded that using substitutive gases would be inappropriate. In addition, we observed that when the flame scale was small, the cylinder's internal pressure before the thermal-activated PRD activation, the rate of pressure rise, and the starting time of PRD activation all increased rapidly. Therefore, it is necessary to either maintain a constant value for the fire source's fuel flow rate, or increase the flame scale, in order to reduce the variance between repeated tests.
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Citation
Tamura, Y., Suzuki, J., and Watanabe, S., "CFD Analysis of Fire Testing of Automotive Hydrogen Gas Cylinders with Substitutive Gases," SAE Technical Paper 2005-01-1887, 2005, https://doi.org/10.4271/2005-01-1887.Also In
SAE 2005 Transactions Journal of Passenger Cars: Mechanical Systems
Number: V114-6; Published: 2006-02-01
Number: V114-6; Published: 2006-02-01
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