| Experiment ID
| Closed lean non-uniform deflagration
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| Short Description
| Hydrogen combustion experiments in stratified and uniform H2-air mixtures in a vertical 10.7 m3 closed vessel.
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| What phenomena were studied
| Flame front propagation and pressure dynamics for top and bottom located ignition sources in both uniform and stratified hydrogen-air mixtures.
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| What phenomena / effects can be studied
| Explosion dynamics for flame propagation in and against the direction of concentration gradient.
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| Instrumentation
| Pressure transducers, H2 concentration samples, thermocouples to obtain flame arrival time.
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| Test variables
| Concentration gradient, average concentration, ignition location. Tests with varying ignition location, for which pressure dynamics is known, are offered for SBEP.
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| Data description / Data completeness
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- Pressure dynamics and flame arrival time for top-ignited H2-air stratified mixture, corresponding to average 12.6% H2 concentration (pressure dynamics for uniform 12.8% H2-air mixture is available for comparison).
- Pressure dynamics for bottom-ignited H2-air stratified mixture, corresponding to average 13.4% H2 concentration (pressure dynamics for uniform 12.4% H2-air mixture is available for comparison).
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| Data availability
| Publicly available.
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| Source of data / Reference
| Whitehouse D.R., Greig D.R., Koroll G.W., 1996. Combustion of Stratified Hydrogen-Air Mixtures in the 10.7 m3 Combustion Test Facility Cylinder. Nuclear Engineering and Design, V.166, pp.453-462
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| Why were chosen
| Large-scale experiment on hydrogen-air deflagration in closed vessel (published in peer reviewed journal), relevant to realistic scenario of stratified H2-air mixture explosion. Benchmark exercise to evaluate a model performance for flame front propagation in non-uniform mixtures.
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| Relevance to the project purposes
| Large scale of the experiment and stratified mixture distribution are relevant to the realistic hydrogen explosion, WP10 “Hydrogen explosions”, IP2 “HyTunnel”.
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| Experimental data
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| Results of simulations
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