Vorticity Variation of High-Pressure Methane Jet Impinging on Premixed Flame

被引：0
|
作者：
Lei Y. [1 ]
Wang Y. [1 ]
Qiu T. [1 ]
Liang X. [1 ]
机构：
[1] Department of Environment and Life Science, Beijing University of Technology, Beijing
来源：
Neiranji Xuebao/Transactions of CSICE (Chinese Society for Internal Combustion Engines) | 2023年 / 41卷 / 05期
关键词：
constant volume incendiary bomb; jet combustion; methane; vorticity;
D O I：
10.16236/j.cnki.nrjxb.202305052
中图分类号：
学科分类号：
摘要：
Based on the software CONVERGE，a three-dimensional simulation was carried out to analyze the characteristics of vorticity changes during the combustion of premixed gas with a constant volume incendiary bomb when the high-pressure methane jet impinges on the premixed gas with an equivalence ratio of 1. According to the position relationship between the front surface of the jet and the flame，the whole flame development process is divided into three stages：the none-contact frame stage before the jet front meeting the flame，the entering flame stage and the leaving flame stage. Compared with the free jet penetration velocity，the average penetration velocity of jet combustion increases significantly at the stage of jet entering the flame，and is greater than the sum of the free jet penetration velocity and premixed combustion velocity. The reason for this result is that the vorticity of momentum parameter increases greatly at this stage. At an axial distance of 40 mm with a flame development time of 1.6 ms，the maximum difference between the average vorticity value of jet combustion mode and that of free jet combustion mode is about 260 s-1，which is 43 times of the average vorticity value of premixed combustion mode at this section at this time. © 2023 Chinese Society for Internal Combustion Engines. All rights reserved.
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页码：442 / 449
页数：7
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