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Christophe PROUST – Jean-Marc LACOME DAGBA – Didier JAMOIS – Lionel PERRETTE

Processes of the formation of large unconfined clouds following a massive spillage of liquid hydrogen on the ground. Christophe PROUST – Jean-Marc LACOME DAGBA – Didier JAMOIS – Lionel PERRETTE. N2(g) + 3 H2(g) <==> 2 NH3(g) + 92 kJ. increase = transportation => LH2 => large spills.

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Christophe PROUST – Jean-Marc LACOME DAGBA – Didier JAMOIS – Lionel PERRETTE

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  1. Processes of the formation of large unconfined clouds following a massive spillage of liquid hydrogen on the ground Christophe PROUST – Jean-Marc LACOME DAGBA – Didier JAMOIS – Lionel PERRETTE

  2. N2(g) + 3 H2(g) <==> 2 NH3(g) + 92 kJ increase = transportation => LH2 => large spills ...

  3. Still today very limited data … • Zabetakis et al. (1961) • Makeev et al. (1981) • Witcofski et al. (1984) • Schmidtchen et al. (1994) • Verfondern K. (1997) • … and consequently limited knowledge : • liquid pool formation and evaporation? • H2-air cloud formation processes ? • explosion regime ?

  4. EXPERIMENTS

  5. buoyancy driven adiabatic • 1st STEP with LHe : • spilling device • instrumentation to clarify mixing processes • predict likely H2 explosion violence • 2nd STEP with LH2...

  6. 1 kg/s LH2 <=> 2 kg/s LHe

  7. SOME RESULTS

  8. 10% 50 to 100 %

  9. CONCLUSIONS

  10. Real LH2 experiments : feasible but dangerous • Routes for modelling • intrinsic source of turbulence : buoyancy • iso-lines on 6 tests • vaporisation processes ? • Some reinterpretation of previous tests...

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