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Auto-ignition Mechanism Near the Boundary Layer for High-pressure Hydrogen Release into Circular and Rectangular Tubes


The accidents that hydrogen ignites without ignition source are reported in several cases, which phenomenon is called “auto-ignition.” Since the use of high pressure hydrogen will be increased for the hydrogen society, it must be necessary to understand auto-ignition mechanism in detail to prevent such accidents. In this study we performed three-dimensional numerical simulations to clarify the autoignition mechanism using the three-dimensional compressive Navier-Stokes equations and a hydrogen chemical reaction model including nine species and twenty elementary reactions. We focus on the effects of the shape of the cross-section on the hydrogen auto-ignition mechanism applying for a rectangular and cylindrical tube. The results obtained indicate that the Richtmyer-Meshukov instability involves these auto-ignition.

Related subjects: Safety
Countries: Japan

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Auto-ignition mechanism near the boundary layer for high-pressure hydrogen release into circular and rectangular tubes

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