超临界二氧化碳离心压缩机气动设计与性能分析研究进展

Research Progress on Aerodynamic Design and Performance Analysis of Supercritical Carbon Dioxide Centrifugal Compressor

超临界二氧化碳(supercritical carbon dioxide,SCO_(2))Brayton循环具有效率高、结构紧凑等优点,在能源动力系统中有着良好的应用前景。离心压缩机作为该循环系统的重要部件,因其运行范围广、单级压比大、效率高等优点同样在能源、动力及化工行业得到广泛的应用。气动设计与性能分析是所有压缩机工作的基础,其包含一维气动设计与分析及全三维CFD(computational fluid dynamics)数值分析等关键部分。相对于传统离心压缩机,近临界点特殊的工质物性为SCO_(2)离心压缩机设计与分析带来了新的挑战。通过对近期相关文献的探讨,综述了SCO_(2)离心压缩机的设计方法以及相关学者的性能分析实验,着重介绍了一维设计方法和三维流动分析中的影响因素,并在综合分析后提出了关于SCO_(2)离心压缩机的设计和性能分析的研究重点。

The supercritical carbon dioxide Brayton(SCO_(2))cycle,which has the advantages of high efficiency and compact structure,has a good application prospect in energy power systems.As an important component of the circulation system,centrifugal compressors are also widely used in energy,power and chemical industries because of their wide operating range,large single-stage pressure ratio and high efficiency.Aerodynamic design and performance analysis is the basis of all compressor work,including one-dimensional aerodynamic design and analysis and full three-dimensional CFD(computational fluid dynamics)numerical analysis and other key parts.Compared with traditional centrifugal compressors,the special working fluid properties near the critical point bring new challenges to the design and analysis of SCO_(2) centrifugal compressors.This paper reviews the design methods of SCO_(2) centrifugal compressors and the performance analysis experiments of relevant scholars through the discussion of recent relevant literature,focuses on the influencing factors in one-dimensional design methods and three-dimensional flow analysis,and puts forward the research focus on the design and performance analysis of SCO_(2) centrifugal compressors after comprehensive analysis.