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To satisfy the needs of large-scale hydrogen combustion and explosion simulation,a method is presented to establish single-step chemistry model and transport model for fuel-air mixture.If the reaction formula for hydrogen-air mixture is H2+0.5O2→H2O,the reaction rate model is ?? =1.13×10?5[H2][O2]exp(?46.37T0/T) mol(cm3 s)?1,and the transport coefficient model is ?=K/CP=ρD=7.0×10?5T 0.7 g(cm s)?1.By using current models and the reference model to simulate steady Zeldovich-von Neumann-Doering(ZND) wave and free-propagating laminar flame,it is found that the results are well agreeable.Additionally,deflagration-to-detonation transition in an obstructed channel was also simulated.The numerical results are also well consistent with the experimental results.These provide a reasonable proof for current method and new models.
To satisfy the needs of large-scale hydrogen combustion and explosion simulation, a method is presented to establish single-step chemistry model and transport model for fuel-air mixture. IF the reaction formula for hydrogen-air mixture is H2 + 0.5O2 → H2O , the reaction rate model is ?? = 1.13 × 10? 5 [H2] [O2] exp (? 46.37T0 / T) mol (cm3 s)? 1 and the transport coefficient model is? = K / CP =? D = 7.0 × 10? 5T 0.7 g (cm s)? 1.By using current models and the reference model to simulate steady Zeldovich-von Neumann-Doering (ZND) wave and free-propagating laminar flame, it is found that the results are well agreeable.Additionally, deflagration-to-detonation transition in an obstructed channel was also simulated.The numerical results are also well consistent with the experimental results. These provide a reasonable proof for current method and new models.