Numerical study on the deflagration to detonation transition promoted by transverse jet

Zixu Zhang; Zhiwu Wang; Junyu LiuWeifeng QinLisi WeiYuxuan Yang

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Numerical study on the deflagration to detonation transition promoted by transverse jet

机译：Numerical study on the deflagration to detonation transition promoted by transverse jet

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摘要

To reveal the mechanism of deflagration to detonation transition promoted by transverse jet, the flame acceleration and detonation initiation process of H_2/Air under transverse jet was numerically investigated. According to the flame propagation characteristics and the main factors that promote flame acceleration in different periods, the process of deflagration to detonation transition was divided into four stages: initial flame development stage, turbulence-flame interaction stage, shock-flame interaction stage, detonation initiation stage. The flame acceleration process of each stage was analyzed in detail. The results indicated that the curling and stretching effect of the transverse jet and vortexes on the flame can effectively increase the flame velocity. The flame would constantly produce compression waves during acceleration. The transverse wave formed by the superposition of the compression waves would be reflected multiple times between the walls and act on the flame front, which is critical for flame acceleration. In addition, the positive feedback between the leading shock wave and the flame was also important for the continuous increase of flame velocity.

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来源
《Aerospace science and technology》 |2023年第5期|108206.1-108206.12|共12页
作者
Zixu Zhang; Zhiwu Wang; Junyu LiuWeifeng QinLisi WeiYuxuan Yang;
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作者单位

Shenzhen Research Institute of Northwestern Polytechnical University, Shenzhen, 518057, China ,School of Power and Energy, Northwestern Polytechnical University. Xi'an, 710072, China;

School of Power and Energy, Northwestern Polytechnical University. Xi'an, 710072, China;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);
原文格式 PDF
正文语种英语
中图分类
关键词
Pulse detonation engine; Transverse jet; Flame acceleration; Detonation initiation;

Numerical study on the deflagration to detonation transition promoted by transverse jet

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