考虑相变的可压缩反应气液流动的清晰界面与多组分模型的保守耦合方法
A conservative coupling method of sharp-interface and multi-species model for compressible reacting gas-liquid flows with phase change
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中文总结 AI 辅助
本文提出一种适用于带相变和化学反应的可压缩两相多组分流动的保守耦合方法，通过扩展黎曼求解器并经多类数值测试验证，可解析相变与化学反应效应且保持保守界面耦合。
中文摘要 AI 辅助
本文针对带相变和化学反应的可压缩两相多组分流动，提出一种保守的清晰界面与扩散界面耦合方法。气液界面由清晰界面模型描述，而气相组分的输运与化学反应则采用扩散界面模型处理。通过从多组分相变黎曼问题得到的界面通量耦合两相，以保证守恒性。原有的单组分四波黎曼求解器通过修改界面能量跳跃条件，扩展适用于多组分气相混合物。界面质量转移仅限制在可凝蒸汽组分，因此界面能量跳跃条件和气相混合物能量交换通量均采用相变蒸汽组分的内能而非混合物内能构建。借助这种组分选择性能量耦合，构建了一种近似多组分黎曼求解器，该求解器保留四波结构，同时避免了精确解所需的多维非线性求根。开展了一系列数值测试，包括脉冲蒸发与凝结、反应铝汽化、激波-液滴相互作用以及爆轰-液滴相互作用，以评估该方法的精度与鲁棒性。数值结果与参考解及基准数据吻合良好，表明本文方法可解析可压缩多组分多相流中相变和化学反应的效应，同时保持保守的界面耦合。
英文摘要
In this paper, a conservative sharp-interface and diffuse-interface coupling method is developed for compressible two-phase multi-species flows with phase change and chemical reactions. The liquid--gas interface is represented by a sharp-interface model, whereas a diffuse-interface model treats the transport and chemical reactions of gas-phase species. Conservation is enforced by coupling the two phases through interfacial fluxes obtained from a multi-species phase-change Riemann problem. The original single-species four-wave Riemann solver is extended to multi-species gas mixtures by modifying the interfacial energy jump condition. Interfacial mass transfer is restricted to the condensable vapor species. Accordingly, both the interfacial energy jump condition and the gas-mixture energy-exchange flux are constructed using the internal energy of the phase-changing vapor species rather than the mixture internal energy. With this species-selective energy coupling, an approximate multi-species Riemann solver is constructed that retains the four-wave structure while avoiding the multidimensional nonlinear root-finding required by the exact solution. A series of numerical tests, including impulsive evaporation and condensation, reacting aluminum vaporization, shock-droplet interaction, and detonation-droplet interaction, are performed to assess the accuracy and robustness of the method. The numerical results agree well with reference solutions and benchmark data, demonstrating that the present method resolves the effects of phase change and chemical reactions in compressible multi-species multiphase flows while preserving conservative interfacial coupling.
发表机构
- School of Aeronautics, Northwestern Polytechnical University（西北工业大学航空学院）
- National Key Laboratory of Aircraft Configuration Design（飞机设计国家重点实验室）
- Institute of Extreme Mechanics, Northwestern Polytechnical University（西北工业大学极端力学研究所）
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