低稠度叶片扩压器(LSVD)在不损耗稳定工况范围的同时,具有较高的效率,应用广泛.本文以当量扩张角为判断依据,结合稠度的概念,提出一种LSVD设计方法,并基于两区域模型建立一种LSVD性能计算方法,完成大规模压缩空气储能系统离心压缩机大流量系数叶轮扩压器匹配设计.结果表明,基于两区域模型所建立的性能计算方法可以作为一维预设计的工具,并结合低稠度叶片扩压器设计方法,实现扩压器匹配设计;进口冲角在-3°～-2°时,离心压缩机整级性能较好,达到设计要求.“,”Low solidity vaned diffuser is widely used for high efficiency and wide range centrifugal compressor.Considering the equivalent divergent angle and solidity,this paper proposed a design method of low solidity vaned diffuser,including performance prediction based on Two-Zone model.A matching design was made for the impeller of a centrifugal compressor with high flow coefficient in Compressed Air Energy Storage (CAES).The results showed that the prediction method developed through this study can serve as a tool for preliminary design and assist the established design method to realize the diffuser matching design;centrifugal compressor had a better performance when the inlet incidence was-3°～-2°.