Features of the Round Hydrogen Microjet Combustion in a Coaxial Air Jet
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Results of experimental studies of features of the round hydrogen microjet combustion in a coaxial air jet are presented in this work. It is shown that the combustion scenario is connected with existence of the «bottleneck flame region». This fact correlates with the similar scenarios of the diffusion hydrogen microjet combustion at subsonic efflux velocity investigated by us earlier. It is revealed that the spherical shape of the “bottleneck flame region” is transformed to a cylindrical shape. It is found that the round hydrogen microjet combustion in a coaxial air jet at supersonic efflux velocity is accompanied by existence of supersonic cells both in a hydrogen microjet and in a wake of coaxial air jet. Round hydrogen microjet supersonic combustion in a coaxial air jet is connected with a flame separation from a nozzle exit.
Keywords
round hydrogen microjet combustion, coaxial air jet, “bottleneck flame region” subsonic and supersonic combustion
Funding
This work was supported by the Russian Science Foundation, project number 16-19-10330
УДК 532.525.2
Features of the Round Hydrogen Microjet Combustion in a Coaxial Air Jet
The material was received by the Editorial Board: 03.04.2019
Abstract Results of experimental studies of features of the round hydrogen microjet combustion in a coaxial air jet are presented in this work. It is shown that the combustion scenario is connected with existence of the «bottleneck flame region». This fact correlates with the similar scenarios of the diffusion hydrogen microjet combustion at subsonic efflux velocity investigated by us earlier. It is revealed that the spherical shape of the “bottleneck flame region” is transformed to a cylindrical shape. It is found that the round hydrogen microjet combustion in a coaxial air jet at supersonic efflux velocity is accompanied by existence of supersonic cells both in a hydrogen microjet and in a wake of coaxial air jet. Round hydrogen microjet supersonic combustion in a coaxial air jet is connected with a flame separation from a nozzle exit.
Keywords
round hydrogen microjet combustion, coaxial air jet, “bottleneck flame region” subsonic and supersonic combustion
Funding
This work was supported by the Russian Science Foundation, project number 16-19-10330
УДК 532.525.2
Features of the Round Hydrogen Microjet Combustion in a Coaxial Air JetReferences: Kozlov V. V., Grek G. R., Katasonov M. M., Litvinenko M. V., Litvinenko Yu. А., Tambovtsev A. S., Shmakov A. G. Features of the Round Hydrogen Microjet Combustion in a Coaxial Air Jet. Siberian Journal of Physics . 2019, vol. 14, no. 2. P. 21–34. (in Russ.). DOI: 10.25205/2541-9447-2019-14-2-21-34