超临界二氧化碳离心压缩机流动特性研究进展  

A review of supercritical carbon dioxide centrifugal compressor flow characteristics

作　　者：杨子木 江泓升 诸葛伟林[1] 钱煜平[1] 张扬军[1] YANG Zimu;JIANG Hongsheng;ZHUGE Weilin;QIAN Yuping;ZHANG Yangjun(State Key Laboratory of Automotive Safety and Energy,School of Vehicle and Mobility,Tsinghua University,Beijing 100084,China)

机构地区：[1]清华大学车辆与运载学院,汽车安全与节能国家重点实验室,北京100084

出　　处：《清华大学学报（自然科学版）》2023年第11期1791-1807,共17页Journal of Tsinghua University(Science and Technology)

基　　金：国家重点研发计划项目(2020YFB1901702)。

摘　　要：超临界二氧化碳(supercritical carbon dioxide,S-CO_(2))Brayton循环是中温高压循环,采用该循环可回收利用燃气涡轮和内燃机等交通动力系统的高温排气能量,从而提高动力系统效率。压缩机高效稳定运行对S-CO_(2)Brayton循环的循环性能起到至关重要的作用。该文从实验、一维流动分析、三维流动特性和流动控制4个方面综述了S-CO_(2)离心压缩机流动特性的研究进展,重点阐述了关于工质临界点附近的剧烈物性变化对压缩机内部流动带来的问题及其研究内容,同时总结了S-CO_(2)离心压缩机流动特性的相关研究,并提出未来S-CO_(2)离心压缩机流动特性的研究重点。[Significance]The supercritical carbon dioxide(S-CO_(2))Brayton cycle is a power cycle at intermediate temperature and high pressure.This cycle is considered an important solution to improving the efficiency of traffic power systems such as gas turbines and internal combustion engines by recycling exhaust energy at high temperatures.The compressor is considered one of the most important components of this cycle.Its efficient and stable operation plays an important role in cycle performance.[Progress]In this paper,the research progress on S-CO_(2) centrifugal compressor flow characteristics was reviewed from four aspects:experiment,one-dimensional flow analysis,three-dimensional flow characteristics,and flow control.Researchers learned from the experimental studies of the S-CO_(2) centrifugal compressor that the special thermophysical properties of S-CO_(2),particularly their dramatic change near the critical point,brought great challenges to the design and stable operation of this compressor.Therefore,the problems of compressor flow caused by the drastic physical properties change near the critical point of the working medium,and the related research contents were emphatically expounded.The current research on one-dimensional flow analysis of the S-CO_(2) centrifugal compressor is mainly conducted by the one-dimensional mean streamline method considering the special thermophysical properties of S-CO_(2) fluid.The preliminary aerodynamic design of the S-CO_(2) centrifugal compressor was conducted using one-dimensional flow analysis.This method is limited by its prediction accuracy under off-design conditions.In addition,the flow details inside the compressor could not be obtained by this method.To reveal the flow mechanism of the S-CO_(2) centrifugal compressor,its three-dimensional flow characteristics must be deeply understood,and its internal flow field information must be obtained.The research on the three-dimensional flow characteristics of the S-CO_(2) centrifugal compressor was mostly conducted by the compu

关 键 词：S-CO_(2)离心压缩机 一维流动 三维流动特性 流动控制 临界点 

分 类 号：TH452[机械工程—机械制造及自动化] U464[机械工程—车辆工程]