Large-eddy simulations of turbulent combustion fields generated by a Submerged Combustion Vaporizer (SCV) burner - Effect of water spray injection on combustion behavior -

Submerged Combustion Vaporizers (SCVs) are often used as LNG vaporizers, and those burners are designed to reduce the maximum flame temperature, which causes the reduction of NOx emission. In order to reduce the maximum flame temperature, it is useful to equip the water spray system for the burners. In this study, large-eddy simulations of the turbulent combustion fields generated by a SCV burner are conducted, and the effect of the water spray injection on the combustion behavior is investigated. As the combustion model, a non-adiabatic flamelet approach, which can take into account the effects of heat losses due to water evaporation and cooling wall, is employed. The results show that the water spray injection effectively causes the reductions of maximum gas temperature and then the NOx emissions.