EXPERIMENTAL STUDY OF THE DIFFUSION COMBUSTION OF A ROUND HYDROGEN MICROJET AT ITS IGNITION FAR FROM THE NOZZLE EXIT

Read more A scenario of subsonic diffusion combustion of the round hydrogen microjet at its ignition far from the nozzle exit is proposed. Stabilization of supersonic diffusion combustion of a hydrogen microjet at its ignition far from the nozzle exit due to the absence of connection between flame and micronozzle exit, i.e. absence of the nozzle heating is found. It is shown that absence of the nozzle heating because of the flame lifted leads to the supersonic mechanism of the hydrogen microjet combustion characterized by disappearance of the «bottleneck flame region», flame separation and supersonic cells occurrence. It is found that one of the stabilizing supersonic combustion factors is existence of the supersonic cells both in jet, and flame.

Keywords:
ignition of a round hydrogen microjet far from the nozzle exit, diffusion combustion, stabilizing of the supersonic micro combustion.
УДК 544.452.42

 EXPERIMENTAL STUDY OF THE DIFFUSION COMBUSTIONOF A ROUND HYDROGEN MICROJETAT ITS IGNITION FAR FROM THE NOZZLE EXIT