Flame acceleration and deflagration-to-detonation transition in micro- and macro-channels: An integrated mechanistic study

Wenhu Han, Yang Gao, Chung K. Law*

*此作品的通讯作者

科研成果: 期刊稿件文章同行评审

112 引用 (Scopus)

摘要

The integrated processes of flame acceleration, deflagration-to-detonation transition (DDT), and the resulting detonation propagation in micro- and macro-scale channels are simulated. It is found that the modes of flame acceleration and DDT in these two channels are different, being primarily controlled by viscosity and turbulent flame development, respectively. Furthermore, while boundary layer ignition is crucial for DDT in both channels, viscous wall friction is the key to self-sustained propagation in micro-channels, leading to momentum loss and consequently deficit of the detonation velocity. In macro-channels, the strong overdriven detonation decays and gradually evolves into the Chapman–Jouguet detonation.

源语言英语
页(从-至)285-298
页数14
期刊Combustion and Flame
176
DOI
出版状态已出版 - 1 2月 2017
已对外发布

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