结构参数对CO_(2)离心压缩机的性能影响分析  

Analysis of influence of structural parameters on performance of CO_(2) centrifugal compressor

作　　者：田玉厂 李亚南 郝佳豪 刘杰[2] 越云凯 杨俊玲[1,3] 张振涛 Tian Yuchang;Li Yanan;Hao Jiahao;Liu Jie;Yue Yunkai;Yang Junling;Zhang Zhentao(Technical Institute of Physical and Chemistry,Chinese Academy of Sciences,Beijing 100190,China;School of Environmental and Municipal Engineering,Qingdao University of Technology,Qingdao 266520,China;Hebei Energy Storage Industry Technology Research Institute,Shijiazhuang 050000,China;University of Chinese Academy of Sciences,Beijing 100049,China;Changsha Borui Energy Technology Co.Ltd.,Changsha 410000,China)

机构地区：[1]中国科学院理化技术研究所,北京100190 [2]青岛理工大学环境与市政工程学院,青岛266520 [3]河北省储能产业技术研究院,石家庄050000 [4]中国科学院大学,北京100049 [5]长沙博睿鼎能动力科技有限公司,长沙410000

出　　处：《低温工程》2024年第5期21-31,共11页Cryogenics

基　　金：国家自然科学基金(52206032);中国科学院稳定支持基础研究领域青年团队计划(YSBR-043);河北省重大专项(23291801Z);上海合作组织科技伙伴计划及国际科技合作计划项目(2022E01023)资助。

摘　　要：为研究各关键结构参数对CO_(2)离心压缩机性能的影响,针对某MW级压缩CO_(2)储能系统低压段中的一级进行了一维设计和三维数值模拟。基于该模型研究了叶片数、叶顶间隙、叶片出口安装角和叶轮出口相对宽度4种关键结构参数对压缩机性能的影响。研究结果表明:叶片出口安装角和叶顶间隙对离心压缩机性能的影响最大,其次是叶片数和叶轮出口相对宽度;增加叶片出口安装角度可显著提高压缩机的做功量及压比,但过大角度会使得流动损失增大而造成效率的降低;随着叶顶间隙的增大,泄漏流动会更加严重,从而影响压缩机的性能;减少叶片数量会减小叶片对流体的约束,更易产生流动分离;叶轮出口相对宽度与压缩机设计流量相关,过小的相对宽度会增大摩擦、泄漏等损失,进而影响压缩机性能及运行工况范围。To study the influence of key structural parameters on the performance of CO_(2)cen-trifugal compressor,one-dimensional design and three-dimensional numerical simulation were car-ried out for the first stage in the low pressure section of a MW-level compressed CO_(2) energy stor-age system.Based on the model,the influence of four key structural parameters,namely the number of blades,the top clearance,the installation angle of the blade outlet and the relative width of the impeller outlet,on the compressor performance was studied.The results show that the installation angle of the blade outlet and the top clearance have the greatest impact on the perform-ance of the centrifugal compressor,followed by the number of blades and the relative width of the impeller outlet.Increasing the installation angle of the blade outlet can significantly improve the working capacity and pressure ratio,but too large the angle will increase the flow loss and reduce the efficiency.As the top clearance increases,the leakage flow will become more serious,which will affect the performance of the compressor.Reducing the number of blades will reduce the fluid constraint of the blades,and it is easier to produce flow separation.The relative width of the im-peller outlet is related to the design flow rate of the compressor,and too small the relative width will increase the loss of friction and leakage,which in turn will affect the performance of the com-pressor and the range of operating conditions.

关 键 词：CO_(2)离心压缩机 结构参数 数值模拟 性能分析 

分 类 号：TH452[机械工程—机械制造及自动化] TK05[动力工程及工程热物理]