In this paper, we investigate the formation and development characteristics of oblique detonation wave in stoichiometric hydrogen-oxygen mixtures diluted with argon using Euler equations coupled with the 19-step or 34-step chemical reaction model. The novelty of this work lies in the study of differences in the characteristics of the initiation region and the formation processes of oblique detonation by different chemical kinetic processes. The formation processes of radicals in the induction region and heat release region for the oblique detonation flow field are emphatically analyzed, and the differences in the sensitivity on the key chemical reaction channels to radicals are also discussed. The results show that under the action of 19-step mechanism, the oblique detonation forms relatively early, the wave morphology of the flow field is complex, and the type of the initiation region is abrupt transition. While for the 34-step mechanism, the structure of flow field is simple with smooth transition type. The existence of transverse wave in the mainstream region contributes a lot to the formation of a sonic region and the abrupt transition structure. The chemical kinetic process directly affects the flow field structure of oblique detonation, and H₂O₂ plays an important role on triggering and accelerating the exothermic process. The radicals of H, O and H₂O₂ have different properties in different chemical reaction models.

在本文中，我们使用欧拉方程结合 19 步或 34 步化学反应模型研究了用氩稀释的化学计量氢氧混合物中斜爆轰波的形成和发展特征。这项工作的新颖之处在于研究了不同化学动力学过程的起爆区特征和斜爆形成过程的差异。重点分析了斜爆轰流场诱导区和放热区自由基的形成过程，讨论了关键化学反应通道对自由基敏感性的差异。结果表明，在19级机构作用下，斜爆震形成较早，流场波形态复杂，起始区类型为突变过渡区。而34级机构流场结构简单，过渡型平滑。主流区横波的存在对声区和突变过渡结构的形成有很大贡献。化学动力学过程直接影响斜爆流场结构，H₂ O ₂在触发和加速放热过程中起重要作用。H、O和H ₂ O ₂自由基在不同的化学反应模型中具有不同的性质。