Single-step chemistry model and transport coefficient model for hydrogen combustion

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.