Chemical Kinetic Uncertainty Quantification in Hydrogen Combustion Computational Fluid Dynamics Simulation for ENACCEF2 Experiment

茂木 孝介  ; 松本 俊慶 ; 塩津 弘之  

Motegi, Kosuke; Matsumoto, Toshinori; Shiotsu, Hiroyuki

Since the hydrogen explosion at the Fukushima Daiichi Nuclear Power Plants accident in March 2011, hydrogen management during severe accidents at nuclear power plants has attracted attention as an important issue. In order to improve hydrogen management under severe accident conditions, the propagation of flames and the resulting loads on structures need to be predicted accurately. For this reason, the use of computational fluid dynamics methods is expected. Various benchmark experiments have been carried out and turbulence models, turbulent combustion models and chemical reaction models have been discussed, but the uncertainties of each model have not been treated independently. Analysis including uncertainty assessment is necessary to promote efficient research activities through uncertainty-based prioritisation and to reflect the latest findings in best practice guidelines. The aim of this study is to establish a methodology for quantifying the chemical reaction uncertainty in turbulent premixed flame CFD and to perform CFD and uncertainty analyses on existing benchmark experiments.