The present study aims at providing insights into shock wave interference patterns in gas flows when a mixture different than air is considered. High-energy non-equilibrium flows of air and \(\hbox {CO}_2\)–\(\hbox {N}_2\) over a double-wedge geometry are studied numerically. The impact of freestream temperature on the non-equilibrium shock interaction patterns is investigated by simulating two different sets of freestream conditions. To this purpose, the SU2 solver has been extended to account for the conservation of chemical species as well as multiple energies and coupled to the Mutation++ library (Multicomponent Thermodynamic And Transport properties for IONized gases in C++) that provides all the necessary thermochemical properties of the mixture and chemical species. An analysis of the shock interference patterns is presented with respect to the existing taxonomy of interactions. A comparison between calorically perfect ideal gas and non-equilibrium simulations confirms that non-equilibrium effects greatly influence the shock interaction patterns. When thermochemical relaxation is considered, a type VI interaction is obtained for the \(\hbox {CO}_2\)-dominated flow, for both freestream temperatures of 300 K and 1000 K; for air, a type V six-shock interaction and a type VI interaction are obtained, respectively. We conclude that the increase in freestream temperature has a large impact on the shock interaction pattern of the air flow, whereas for the \(\hbox {CO}_2\)–\(\hbox {N}_2\) flow the pattern does not change.

本研究旨在提供当考虑与空气不同的混合物时，对气流中冲击波干扰模式的见解。空气和\（\ hbox {CO} _2 \） – \（\ hbox {N} _2 \）的高能非平衡流对双楔形几何体进行了数值研究。通过模拟两组不同的自由流条件，研究了自由流温度对非平衡冲击相互作用模式的影响。为此，SU2求解器已扩展为可解决化学物质以及多种能量的守恒问题，并已与Mutation ++库（C ++中离子化气体的多组分热力学和传输性质）耦合在一起，该库提供了所有必要的热化学性质。混合物和化学物质。针对相互作用的现有分类法，对冲击干扰模式进行了分析。热理想理想气体模拟和非平衡模拟之间的比较证实，非平衡效应会极大地影响冲击相互作用的模式。\（\ hbox {CO} _2 \）为主的流，自由流温度分别为300 K和1000 K；对于空气，分别获得了V型六冲击相互作用和VI型相互作用。我们得出的结论是，自由流温度的升高对气流的冲击相互作用模式有很大影响，而对于\（\ hbox {CO} _2 \） – \（\ hbox {N} _2 \）流动，没变。