恒定横向应变率下氢-氧-氩胞状爆轰动力学
Dynamics of Hydrogen-oxygen-argon cellular detonations with a constant mean lateral strain rate
摘要：
本工作重新审视的问题，模拟真实的气相爆轰动力学在宏观尺度上简单的稳态一维（1D）模型。在H2/O2/Ar反应体系中进行了爆轰波在截面指数扩展通道中传播的实验研究。在宏观尺度上得到了稳定的爆轰波，其胞状结构的特征在于反应性横波。对于所有的混合物研究，平均爆速的依赖性被认为是在良好的协议与准一维爆轰动力学的第一性原理预测与横向应变速率从详细的化学动力学模型预测。这种极好的一致性与Radulescu和Borzou（2018）在更不稳定的爆炸中的早期实验不同。良好的协议可能是由于更长的反应区长度的氩气稀释的氢-氧爆轰在低压下，与特征诱导区长度相比。虽然胞状不稳定性改变了爆轰诱导区，但宏观尺度下的爆轰动力学可以说是由其流体动力学厚度控制的。在极限附近，观察到微小的差异，实验爆炸通常继续传播到略高的横向应变率和更高的速度赤字。
英文摘要：
The present work revisits the problem of modelling the real gaseous detonation dynamics at the macro-scale by simple steady one-dimensional (1D) models. Experiments of detonations propagating in channels with exponentially expanding cross-sections were conducted in the H2/O2/Ar reactive system. Steady detonation waves were obtained at the macro-scale, with cellular structures characterized by reactive transverse waves. For all the mixtures studied, the dependence of the mean detonation speed was found to be in excellent agreement with first principles predictions of quasi-1D detonation dynamics with lateral strain rate predicted from detailed chemical kinetic models. This excellent agreement departs from the earlier experiments of Radulescu and Borzou (2018) in more unstable detonations. The excellent agreement is likely due to the much longer reaction zone lengths of argon diluted hydrogen-oxygen detonations at low pressures, as compared with the characteristic induction zone lengths. While the cellular instability modifies the detonation induction zone, the detonation dynamics at the macro-scale are arguably controlled by its hydrodynamic thickness. Near the limit, minor discrepancy is observed, with the experimental detonations typically continuing to propagate to slightly higher lateral strain rates and higher velocity deficits.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
