Numerical and experimental investigation of the velocity field and spray distribution of a novel H2-O2-H2O burner

As part of the energy transition, a shift to CO2-neutral fuels is inevitable. One potential fuel is hydrogen, which leads to increased nitrogen oxide emissions when air is used due to higher adiabatic combustion temperatures. A completely emission-free use of hydrogen can be achieved by combustion with oxygen instead of air, but the adiabatic combustion temperatures then exceed 3300K making this technologically difficult to realize. In this work, a new combustion process is presented in which the combustion is cooled by liquid water. For this purpose, an innovative novel burner with an integrated dual-fluid nozzle has been developed. The focus of the following work is the numerical and experimental investigation using substitute gases to prepare further steps. It has been shown that the numerical simulations give satisfactorily accurate results and valuable information about the resulting spray has been collected, so that more sophisticated simulations can be performed in further steps.