| Issue |
E3S Web Conf.
Volume 578, 2024
XL Siberian Thermophysical Seminar (STS-40)
|
|
|---|---|---|
| Article Number | 01036 | |
| Number of page(s) | 7 | |
| DOI | https://doi.org/10.1051/e3sconf/202457801036 | |
| Published online | 14 October 2024 | |
On the features of diffusion combustion of hydrogen microjets
Khristianovich Institute of Theoretical and Applied Mechanics SB RAS Novosibirsk, Russian Federation
* Corresponding author: kozlov@itam.nsc.ru
This paper presents the results of an experimental investigation of the diffusion combustion scenario of a round hydrogen microjet flowing from a cylindrical thin-walled micronozzle with a diameter of 200 μm when ignited near and at any distance from the nozzle exit. A review of the literature on the research topic is presented and a comparison is performed in dimensionless parameters based on the Reynolds number. It has been established that stabilization of the torch during the expiration of a round microjet of hydrogen is associated with heating of the nozzle by the laminar region of the flame. A hysteresis of the process of diffusion combustion of round hydrogen microjets was discovered depending on the region of ignition of the microjet (laminar or turbulent region of the torch) and on changes in the jet velocity.
© The Authors, published by EDP Sciences, 2024
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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