A direct simulation Monte Carlo based approach is proposed to model the planar shock-wave reflection in a shock tube. The approach is validated through comparisons with available time-dependent pressure and absorbance measurements of gas relaxation behind a reflected shock in an argon–oxygen gas mixture for incident shock velocities of $1–1.5\mathrm{km}/\mathrm{s}$. It is then used to model reacting airflows for velocities $2–3\mathrm{km}/\mathrm{s}$, with the primary focus on the flow evolution inside the boundary layer. The feasibility of using the reflected shock configuration for the evaluation of vibrational energy accommodation, as well as the gas-phase recombination reaction rate constants, is studied. Finally, low- and high- fidelity real gas effect models are used to assess the model impact on gas macroparameters under nonequilibrium conditions.

提出了一种基于蒙特卡罗的直接仿真方法来模拟激波管中的平面激波反射。通过与可用的随时间变化的压力和吸收率测量值进行比较，验证了该方法的有效性，该压力和吸收率测量值是在氩气-氧气混合气中反射冲击后气体弛豫的入射冲击速度$\mathrm{1个}–1.5\mathrm{公里}/\mathrm{s}$。然后用于对速度的反应气流建模$2–3\mathrm{公里}/\mathrm{s}$，主要关注边界层内部的流动演化。研究了使用反射冲击构型评估振动能量容纳以及气相重组反应速率常数的可行性。最后，使用低保真度和高保真度的实际气体效应模型来评估模型在非平衡条件下对气体宏观参数的影响。