| Experiment ID
| UU-02
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| Short Description
| Deflagration of large-scale (initial radius 10 m) hemispherical stoichiometric hydrogen-air mixture in open atmosphere ignited at the centre of hemisphere.
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| What phenomena were studied
| Flame front propagation and pressure generation after point ignition of initially quiescent mixture.
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| What phenomena / effects can be studied
| Flame propagation dynamics in open atmosphere, pressure wave generation and propagation.
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| Instrumentation
| Pressure transducers, video cameras to obtain flame contours.
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| Test variables
| -
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| Data description / Data completeness
| Snapshots of flame contours up to 20 m and average flame front radius in time, pressure-time transients at 2, 2.4, 5, 6.5, 8, 18, 25, 35, 60, 80 m from the ignition point.
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| Data availability
| Experiment performed by HySafe partner (FhG-ICT)
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| Source of data / Reference
| 1. Schneider H., Pförtner H. PNP-Sichcrheitssofortprogramm, Prozebgasfreisetzung-Explosion in der gasfabrik und auswirkungen von Druckwellen auf das Containment. Dezember 1983.
2. Becker T., Ebert F., Vergleich zwischen experiment und theorie der explosion grober, freier gaswolken. Chem.-Ing.-Tech., V.57, N.1, pp.42-45, 1985
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| Why were chosen
| Largest ever experiment on hydrogen-air deflagration in open atmosphere.
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| Relevance to the project purposes
| One of the possible scenarios in practice is hydrogen-air deflagration in open atmosphere.
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| Experimental data
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| Results of simulations
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