COMBUSTION OF THE ROUND MICROJET PREMIXED HYDROGEN WITH OXYGEN EFFLUX FROM THE LINEAR CHANNEL

Read more The purpose of this work consists in experimental study of combustion features of the round microjet premixed hydrogen with oxygen. Situation of the microjet efflux and combustion of hydrogen/oxygen mixture from a straight micronozzle with a parabolic mean velocity profile at the nozzle exit is considered. It is shown that addition of oxygen leads to decrease in velocity range of existence of a microjet combustion in comparison with similar parameter at diffusion combustion of a pure hydrogen. It is found that with growth of a microjet velocity efflux, the combustion termination of its is connected with reduction of an oxygen part in mixture. It is revealed that the spherical shape of «bottleneck flame region» is transformed to the narrow and extended area of a laminar flame of a cylindrical shape. Its thinning process grows with growth of microjet velocity efflux.

Keywords:
round microjet, hydrogen/oxygen mixture combustion, «bottleneck flame region», shadow method of a research, combustion shadow patterns, straight micronozzle. 
УДК 544.452.42

COMBUSTION OF THE ROUND MICROJET PREMIXED HYDROGEN WITH OXYGEN EFFLUX FROM THE LINEAR CHANNEL