基于非平衡相变的超临界二氧化碳离心压缩机气动性能分析  

Aerodynamic Performance Analysis of Supercritical Carbon Dioxide Centrifugal Compressor Based on Non-equilibrium Phase Transition

作　　者：黄哲 杨雯[2] 梁铁波[2] 沈昕[1,3] 欧阳华 杜朝辉[1,3] HUANG Zhe;Yang Wen;LIANG Tiebo;SHEN Xin;OUYANG Hua;DU Zhaohui(School of Mechanical Engineering,Shanghai Jiao Tong University,Shanghai 200240,China;Science and Technology on Reactor System Design Technology Laboratory,Nuclear Power Institute of China,Chengdu 610213,China;Shanghai Non-carbon Energy-Conversion and Utilization Institute,Shanghai 200240,China)

机构地区：[1]上海交通大学机械与动力工程学院,上海200240 [2]中国核动力研究设计院核反应堆系统设计技术重点实验室,成都610213 [3]上海非碳基能源转换与利用研究院,上海200240

出　　处：《工程热物理学报》2024年第9期2631-2639,共9页Journal of Engineering Thermophysics

基　　金：受上海市IV类高峰学科资助:能源科学与技术。

摘　　要：作为超临界二氧化碳(SCO_(2))布雷顿循环的核心动力部件,准确分析近临界工况下压缩机的气动热力性能及损失特性对循环的高效运行至关重要。SCO_(2)压缩机在近临界点工作时易发生凝结,且凝结过程具有非平衡性,因此本文建立了基于欧拉–欧拉源项的SCO_(2)非平衡冷凝模型,并与平衡冷模型对比,评估了非平衡冷凝过程对SCO_(2)离心压缩机气动热力性能的影响。结果表明,非平衡冷凝模型对压缩机效率预测的结果更加准确;此外,非平衡的冷凝过程将导致压缩机的实际进口流量增加并使压缩机更快到达近喘振工况。As the core power component of the supercritical carbon dioxide(SCO_(2))Brayton cycle,accurate analysis of the aerodynamic thermodynamic performance and loss characteristics of the compressor under near-critical conditions is crucial for the efficient operation of the cycle.The compressor is prone to condensation when working near the critical point,and the condensation process is non-equilibrium.In this paper,an SCO_(2)non-equilibrium condensation model based on the Euler-Euler source term is established and compared with the equilibrium condensation model to evaluate the impact of the non-equilibrium condensation process on the aero-thermodynamic performance of the SCO_(2)centrifugal compressor.The results show that the non-equilibrium condensation model is more accurate in predicting efficiency,and non-equilibrium condensation will cause the compressor to enchance the inlet flowrate and enter near-surge conditions faster.

关 键 词：超临界二氧化碳 离心压缩机 非平衡相变 数值分析 气动性能 

分 类 号：TK05[动力工程及工程热物理]