Hydrogen-Air-Steam Deflagration Experiment Simulated Using Different Turbulent Flame-Speed Closure Models

[+] Author and Article Information
Tadej Holler

Jožef Stefan Institute, Jamova ulica 39, SI-1000, Ljubljana, Slovenia

Ed, M.J. Komen

Nuclear Research and Consultancy Group, Westerduinweg 3, 1755ZG, Petten, The Netherlands

Ivo Kljenak

Jožef Stefan Institute, Jamova ulica 39, SI-1000, Ljubljana, Slovenia

1Corresponding author.

ASME doi:10.1115/1.4039067 History: Received September 30, 2016; Revised December 21, 2017


The paper presents the CFD combustion modeling approach based on two combustion models. This modeling approach was applied to a hydrogen deflagration experiment conducted in a large-scale confined experimental vessel. The used combustion models were Zimont's Turbulent Flame-speed Closure (TFC) model and Lipatnikov's Flame-Speed Closure (FSC) model. The conducted simulations are aimed to aid identifying and evaluating the potential hydrogen risks in Nuclear Power Plant (NPP) containment. The simulation results show good agreement with experiment for axial flame propagation using the Lipatnikov combustion model. However, substantial overprediction in radial flame propagation is observed using both combustion models, which consequently results also in overprediction of the pressure increase rate and overall combustion energy output. As assumed for a large-scale experiment without any turbulence inducing structures, the combustion took place in low-turbulence regimes, where the Lipatnikov combustion model, due to its inclusion of quasi-laminar source term, has advantage over the Zimont model.

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