为研究超临界水煤气制氢技术中所用混合工质透平低压级内的非平衡凝结流动特性和激波演化规律，基于国内外研究现状，建立了二维叶栅通道模型，采用自编程的双组分凝结模型对透平低压区H2O/CO2混合气体进行数值模拟，得到5种不同混合工质组分下水蒸气的凝结特性及伴随的激波效应。结果表明：CO2作为不凝气体对混合工质的凝结产生了抑制，随着CO2组分含量从0%增加到40%过程中，混合工质中的H2O分压逐步减小，凝结速率逐渐降低（凝结现象被削弱），成核位置向后移动；CO2组分含量增加使得水蒸汽凝结量减少，释放凝结潜热产生的压力脉动减小，对气动激波的干涉作用减弱，叶栅通道内激波效应增强。同时，CO2组分的变化还引起水蒸汽凝结位置向出口移动，凝结压力脉动的位置也随之改变，最终导致叶栅尾缘激波形态发生改变。

Supercritical water coal gasification hydrogen production technology is a new type of coal utilization technology, which finally generates supercritical H2O and CO2 mixtures into the mixed working fluid turbine to do work, and the presence of non-condensable gas will affect the flow characteristics in the turbine. Based on the research status at home and abroad, a two-dimensional leaf gate channel model was established, and a self-programmed two-component division condensation model was used to numerically simulate the H2O/CO2 mixed gas, and the non-equilibrium condensation characteristics and shock wave effect of the mixed working fluid in the channel under different CO2 concentrations were studied. The results show that CO2 as an incondensable gas inhibits the condensation of the mixed working fluid components, and as the CO2 concentration increases from 0% to 40%, the partial pressure of H2O in the mixed working fluid gradually decreases, the condensation rate gradually decreases (the condensation phenomenon is weakened), and the nucleation position moves backward. With the increase of CO2 concentration, the amount of water vapor condensation decreases, the pressure fluctuation caused by the release of latent heat of condensation decreases, and the coupling effect on the pneumatic shock wave decreases, resulting in the decrease of the intensity of the shock wave at the trailing edge of the blade grid. At the same time, the condensation position of water vapor moved backward, and the position of condensation pressure fluctuation on the suction side of the blade also moved backward, which eventually led to the change of the shock wave morphology of the trailing edge of the blade gate.

TK221

河北省自然科学基金项目（E2023502025）；河北省高等学校科学研究项目青年拔尖项目(BJ2025053)；国家自然科学基金项目（52106042）；中央高校基本科研业务费项目（2024MS145）