斜流压气机扩压器设计和流场的数值模拟研究

摘要

以匹配某高增压比斜流叶轮为目标,设计了Z15、Z16和Z17三个扩压器方案.然后以斜流级(斜流叶轮+扩压嚣)为研究对象,展开了三维粘性数值模拟研究,分析了不同万案扩压器的总体性能以及内部流场结构.研究结果表明,设计方案满足匹配斜流叶轮的目标,三种方案的整级最大绝热效率均超过82%,最大总压比超过5.6,大多数工况点的静压恢复系数大于0.6,总压恢复系数大于0.92其中,Z16方案气动性能最优.%In order to match a high pressure ratio mixed-flow impeller,3 design rases named Z15,Z16 and Z17 have been done using the developed method. Then a 3D viscous numerical simulation has been done for the mixed- flow compressor stage,so as to analyze the overall performance and internal flow configuration, Numerical results demonstrate that,the adiabatic efficiency of all the 3 design cases are larger than 82% ,maximum total pressure ratio exceeds 5. 6,static pressure recovery coefficient exceeds 0. 6 for most of operation points,and total pressure recovery coefficient is larger than 0. 92. The Z16 case is the optimal among the 3 oases.