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Simulation of Fast Gas Injection Expansion Phase Experiments under Different Pressures

Journal of Energy and Power Engineering 2012年第1期6卷 1-11页

作者： donella pellini Wemer Maschek Nicola Forgione Francesco Poli Francesco Oriolo Karlsruhe Institute of Technology Karlsruhe D-76021 Germany Dipartimento di Ingegneria Meccanica Nucleare e della Produzione Universita di Pisa Pisa 56126 Italy

The injection of a high pressure gas into a stagnant liquid pool is the characteristic phenomenon during the expansion phase of a hypothetical core disruptive accident in liquid metal cooled fast reactors. In order to investigate lots of mechanisms involved in this phase of the accident＇s evolution, an experimental campaign called S GI was performed in 1994 in Forschungszentrum Karlsruhe, now KIT. This campaign consists of nine experiments which have been dedicated to assess the effects of different pressure injection, the nozzle＇s size and the presence of inner confinement in the formation of the rising bubble. Three of these experiments, which were focused on the pressure effects, have now been simulated with SIMMER III code and with FLUENT 6.3, a commercial CFD code. Both codes, despite their different features, have showed a good agreement with the experimental results. In particular, time trend evolutions of pressures and bubble volumes have been well reproduced by simulation. Furthermore, both codes agree on the shape of the bubble, even though they have evidenced same discrepancies with the experimental shape.

关键词： Expansion phase SIMMER III code FLUENT.

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