水蒸气环境中阵列微管氢氧燃烧模型耦合研究

The coupled modeling problem of hydrogen micro-mixed combustion in water vapor environment was investigated using a combination of laser diagnostic measurements and RANS (Reynolds-averaged Navier-Stokes) numerical simulations. The no-reacting flow field and reacting OH group components distribution in the combustor chamber were experimentally measured. Compared with the experimental results， the deviation of the no-reacting flow field was 12.5% and the distribution of OH group components in the reacting flow was closely matched with the experimental measurements by using the realizable k-ε turbulence model and flamelet-generated manifold-finite-rate (FGM-FR) model. This coupled simulation method demonstrated a relatively accurate method of hydrogen micro-premixed combustion in water vapor environment. The numerical simulation results showed that the change of oxygen mass fraction can affect the flame length， showing a quasi-linear relationship with oxygen mass fraction. The increase in oxygen mass fraction led to an increase in the local combustion rate，reduction in the flame profile area， which improved flame resistance against turbulent stretch and enhanced flame stability as well.