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- W2536700841 abstract "Computer analyses have been performed to assess the dynamic pressure loads to the ITERFEAT vessel during a conservative accident scenario assuming air ingress, production of 5 kg hydrogen, formation of a local stoichiometric hydrogen-air mixture, and ignition of a local detonation. The mechanical loads from the detonation to the vessel and the ports were investigated with two different 3D-codes, DET3D and GASFLOW, to study the effects from the grid geometry, the spatial resolution, the type and order of the numerical solver. Both codes were validated against experimental data. A geometry model of the ITER-FEAT vessel was developed for each code and used for numerical simulation of the generated pressure loads. The peak pressure values resulting from the calculations depend mainly on the angle of incidence of the detonation wave with respect to the confining surface. Pressures of about 10 bar were predicted for side-on orientation (wave surface perpendicular to the structure), and 25 bar for normal reflection. The best results were obtained with an explicit, second-order solver, Cartesian grid, and high spatial resolution (DET3D, 2.2 million cells). The reflected impulses calculated for the 5kg-H2-detonation (5 kPa s) correspond roughly to the collision of a passenger car at medium traffic velocity, a value which compares well with results obtained from 1D-calculations. As for the gas temperatures, values up to 3500 K have been calculated." @default.
- W2536700841 created "2016-10-28" @default.
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- W2536700841 date "2001-01-01" @default.
- W2536700841 modified "2023-09-23" @default.
- W2536700841 title "ITER-FEAT. Accident analysis on hydrogen detonation using DET3D and GASFLOW" @default.
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- W2536700841 doi "https://doi.org/10.5445/ir/270049354" @default.
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