Combustion of round hydrogen microjet in a concurrent flow

V. V. Kozlov, G. R. Grek, M. V. Litvinenko, Yu A. Litvinenko, A. S. Tambovtsev, A. G. Shmakov

Результат исследования: Научные публикации в периодических изданияхстатья по материалам конференции

Аннотация

Experimental data on the diffusion combustion of round hydrogen microjet in concurrent coaxial flows are presented. The effects on combustion of the concurrent flow of air and that of air premixed with nanopowder of TiO2 are of interest. The hydrogen microjet is emanated from a round micronozzle which is surrounded by a coaxial slit to produce the concurrent flow. Combustion events found in the present conditions are similar to those observed in the previous studies on diffusion combustion of hydrogen microjets at subsonic and supersonic velocities. In a subsonic range, the so-called "bottleneck-flame region" is generated close to the nozzle exit, while in high-speed conditions the flame separates from the nozzle. At increasing velocity of both the hydrogen microjet and the concurrent flow, the "bottleneck-flame region" is still found and the combustion becomes more intense. The "bottleneck-flame region" is suppressed at the microjet velocity approaching transonic values.

Язык оригиналаанглийский
Номер статьи012061
ЖурналJournal of Physics: Conference Series
Том1404
Номер выпуска1
DOI
СостояниеОпубликовано - 6 дек 2019
Событие16th All-Russian Seminar with International Participation on Dynamics of Multiphase Media, DMM 2019 - Novosibirsk, Российская Федерация
Продолжительность: 30 сен 20195 окт 2019

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