A study and comparison of the modes of diffusion combustion of hydrogen and methane at their outflow from the annular nozzle together with the flow of supplied air from the coaxially located circular nozzle

Abstract The article presents qualitative data on the study of process diffusion combustion during outflow a gas jet from nozzle apparatus with certain arrangement nozzles. is round straight channel and coaxially located annular slot. In experiments, hydrogen or methane was supplied through an slot, air central circular micro nozzle. main features are revealed comparison processes carried out. both cases, at initial stage, laminar observed near exit breakthrough flame front occurs release incombustible mixture combustible air. At high flow rate, separates exit. fundamental difference that exhibits significantly better stabilization characteristics