Generation mechanism of a new type of unburnt gas pocket and its influences on the detonation-wave/boundary-layer interaction | Zendy

Yuqi Wang | Zendy; Jianhan Liang | Zendy; Xiaodong Cai | Zendy; Yasser Mahmoudi | Zendy

Open Access

Generation mechanism of a new type of unburnt gas pocket and its influences on the detonation-wave/boundary-layer interaction

Author(s) -

Yuqi Wang,

Jianhan Liang,

Xiaodong Cai,

Yasser Mahmoudi

Publication year - 2022

Publication title -

physics of fluids

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.188

H-Index - 180

eISSN - 1089-7666

pISSN - 1070-6631

DOI - 10.1063/5.0088740

Subject(s) - detonation , physics , supersonic speed , mechanics , boundary layer , shock wave , ignition system , mechanism (biology) , instability , oblique shock , classical mechanics , explosive material , thermodynamics , chemistry , organic chemistry , quantum mechanics

This work studies numerically the generation mechanism of a new type of unburnt gas pocket and its effects on the characteristics of detonation-wave/boundary-layer interaction in supersonic flows. Results show that this new type of unburnt pocket is generated due to a local re-ignition of preheated gas behind the separated oblique shocks, unlike the traditional unburnt pockets generated due to the longitudinal instability of the detonation front. The chemical energy released by the new unburnt pocket in the supersonic area is found to be blocked by the shear layer and is unfavorable for the self-sustaining propagation of the detonation wave.

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