叶顶间隙对超临界二氧化碳离心压缩机气动性能影响研究  

Effect of Tip Clearance on Aerodynamic Performance of Supercritical Carbon DioxideCentrifugal Compressor

作　　者：刘朝阳 童志庭 鞠鹏飞 张超 LIU Zhao-yang;TONG Zhi-ting;JU Peng-fei;ZHANG Chao(Tianjin Key Laboratory of the Design and Intelligent Control of the Advanced Mechatronical System,Tianjin 300384,China;National Demonstration Center for Experimental Mechanical and Electrical Engineering Education(Tianjin University of Technology),Tianjin 300384,China)

机构地区：[1]天津市先进机电系统设计与智能控制重点实验室,天津300384 [2]机电工程国家级实验教学示范中心(天津理工大学),天津300384

出　　处：《汽轮机技术》2022年第3期183-186,176,共5页Turbine Technology

基　　金：国家自然科学基金(51976139)。

摘　　要：超临界二氧化碳离心压缩机的气动性能一直备受关注,为了研究不同叶顶间隙对超临界二氧化碳离心压缩机内部流动与稳定工作范围的影响,通过数值计算得出了不同叶顶间隙下超临界二氧化碳离心压缩机的性能曲线。结果表明:叶顶间隙的增大会降低小流量工况和设计工况下超临界二氧化碳离心压缩机的效率和压比,但在大间隙下压缩机的堵塞流量会有所增大。通过对不同间隙下压缩机叶顶区域流道静压分布、95%叶高载荷分布以及相对马赫数流场的详细分析,解释了不同叶顶间隙影响超临界二氧化碳离心压缩机性能的原因。The aerodynamic performance of supercritical carbon dioxide centrifugal compressors has always attracted attention.In order to study the influence of different tip clearances on the internal flow and stable working range of supercritical carbon dioxide centrifugal compressors,the performance curves of supercritical carbon dioxide centrifugal compressor with different tip clearance were obtained by numerical calculation.The results show that the increase of the tip clearance will reduce the efficiency and pressure ratio of the supercritical carbon dioxide centrifugal compressor under small flow conditions and design conditions,but the blockage flow of the compressor will increase under large clearances.Through detailed analysis of the flow path static pressure distribution in the compressor tip area,the 95%blade high load distribution and the relative Mach number flow field under different clearances,the reasons why different tip clearances affect the performance of supercritical carbon dioxide centrifugal compressors are explained.

关 键 词：超临界二氧化碳 离心压缩机 叶顶间隙 数值模拟 性能分析 

分 类 号：V231.1[航空宇航科学与技术—航空宇航推进理论与工程]