韩中合,邬旭威,韩旭,姚博川,施海波

• 1:华北电力大学河北省低碳高效发电技术重点实验室

摘要(Abstract)：

超临界水煤气化制氢发电技术是一种高效清洁的发电技术。基于熵产理论，对末级叶栅内H_2O/CO_2混合工质的非平衡凝结流动开展数值研究。通过划分出叶栅内不同损失产生的区域并计算各区域内熵产从而量化损失。分析了背压及混合工质中CO_2质量分数变化对各类损失及熵产来源的作用机理，并探究其影响规律。结果表明：作为总损失的关键组成部分，壁面损失、尾迹损失和边界层损失在不同工况下的占比始终超过90%。熵产的主要来源包括壁面耗散、直接耗散和湍流耗散。当背压升高了5.03 kPa时，总损失减少了31.73%；而当混合工质中CO_2质量分数增加了40%，总损失增加了4.71%。尾迹损失中湍流耗散熵产变化是总损失变化的主要原因，且与流场中的速度梯度密切相关。研究结果可为混合工质汽轮机湿蒸汽区损失分析及气动优化提供参考。

关键词(KeyWords)： H_2O/CO_2混合工质;非平衡凝结;熵产理论;损失分析

Abstract:

Keywords:

基金项目(Foundation): 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）;; 中央高校基本科研业务费项目（2024MS145）~~

作者(Author): 韩中合,邬旭威,韩旭,姚博川,施海波

DOI: 10.19666/j.rlfd.202505108

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