石油与天然气化工2026，Vol.55Issue(1)：1-10,10.DOI:10.3969/j.issn.1007-3426.2026.01.001
基于激波−相变耦合效应的超声速天然气脱碳机理研究
Study on supersonic natural gas decarbonization mechanism based on shock wave-phase transition coupling effect
摘要
Abstract
Objective Aiming at the core scientific challenges of the shock wave-phase transition coupling effect in supersonic carbon capture technology,the purpose is to elucidate the interaction mechanism between CO2 non-equilibrium condensation and shock wave evolution during natural gas expansion,and to break through the bottlenecks in separator performance optimization.Method By constructing a numerical model for two-component(CH4-CO2)condensing flow,a systematic multi-physical field coupling analysis was carried out,focusing on the evolution patterns of shock waves,the differences in flow models,and the effect of energy recovery efficiency on CO2 non-equilibrium condensation.Meanwhile,the nonlinear coupling mechanism between the oscillations of thermodynamic parameters and the flow parameters was quantified.Result In the supersonic flow field,the mixed gas underwent an intense phase transition downstream of the throat after it reached critical subcooling.A large number of condensing nuclei formed at the Wilson point,accompanied by the aggregation of vapor molecules,and the release of latent heat significantly altered the flow field characteristics.Conversely,the temperature spike induced by the formation of a shock wave caused reverse evaporation of droplets,resulting in a dynamic coupling effect between phase transition and supersonic flow.The single-phase flow models had inherent limitations:the predicted shock wave intensity was 54.6%higher than the actual value,the shock wave position lagged by 9.1%,and the cooling capacity and expansion characteristics could not be accurately evaluated.Further research revealed that when energy recovery efficiency increased from 50.0%to 75.0%,the shock wave position moved forward by 39.5%.Conclusion The critical efficiency thresholds are vital for preventing secondary evaporation prior to droplet separation.Establishing an optimal balance between liquefaction efficiency and energy recovery is essential for practical applications.关键词
天然气/脱碳/碳捕集/超声速分离/非平衡凝结/激波Key words
natural gas/decarbonization/carbon capture/supersonic separation/non-equilibrium condensation/shock wave引用本文复制引用
韩晨玉,刘春雨,万宇飞,王文光,窦卓颖,蒋文明..基于激波−相变耦合效应的超声速天然气脱碳机理研究[J].石油与天然气化工,2026,55(1):1-10,10.基金项目
国家自然科学基金"基于超音速膨胀过程的天然气脱CO2过程机理研究"(51406240) （51406240）
国家科技重大专项"新型油气勘探开发国家科技重大专项"(2024ZD14038) （2024ZD14038）
