The formation and development of oblique detonation wave with different chemical reaction models

Guo, Hongbo; Jia, Xiongbin; Zhao, Ningbo; Li, Shuying; Zheng, Hongtao; Sun, Chengwen; Chen, Xiang

doi:10.1016/j.ast.2021.106964

Cited by 10 publications

(2 citation statements)

References 61 publications

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“…Balakrishnam and Willams' [37] [12,29]. The chemical mechanism may affect the initiation of the ODW [38], but it is not discussed in this paper. This paper focused on the effects of the expansion wave on the initiation of ODW, and thus the same chemical mechanism was applied in all the cases.…”

Section: Methodsmentioning

confidence: 94%

“…Balakrishnam and Willams' [37] chemical reaction model with 9 species (O2, N2, H, OH, O, H2, H2O, HO2, H2O2) and 21 elementary reversible reactions was employed, which has been used to simulate OSW-ODW transitions [12,29]. The chemical mechanism may affect the initiation of the ODW [38], but it is not discussed in this paper. This paper focused on the ef-…”

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Criticality for Oblique Detonation Waves Induced by a Finite Wedge in a Hydrogen–Air Mixture

Qin

Zhu

2023

Aerospace

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Two-dimensional oblique detonation waves (ODWs) induced by finite wedges in a stoichiometric hydrogen–air mixture have been investigated numerically based on reactive Euler equations with a detailed chemical reaction model. The main zone affected by the expansion wave emanating from the turning point of a wedge is the flowfield downstream of the intersection point of the oblique shock wave (OSW) and the expansion wave. The ODW would be reduced to Chapman–Jouguet (CJ) detonation or decoupled combustion downstream. Three combustion regimes, detonation, decoupled combustion, and no ignition, were observed successively, as the wedge length decreases. It is found that the location of the intersection point is a key parameter for the detonation initiation. When the intersection point is located upstream of the ODW transition point, the expansion wave may quench ODW. Then, the critical wedge length is obtained by theoretical analysis of wave structures and the initiation criterion of ODWs for finite wedges is proposed. When the wedge length is greater than the critical wedge length, ODWs can be initiated. On the contrary, the initiation of ODWs do not occur. For wedge lengths small enough, no ignition occurs. Previously proposed criteria that use the induction length are also examined and compared with the present critical wedge length criterion in this study, and the latter is proven to achieve better results.

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