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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+扩压器)为研究对象,展开了三维粘性数值模拟研究,分析了不同方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 diagonal flow impeller, three diffuser schemes of Z15, Z16 and Z17 are designed. Then, a three-dimensional viscous numerical model is developed for the diagonal flow (impeller + diffuser) Simulation study, analysis of the overall performance of different schemes of diffuser and internal flow field structure. The results show that the design meets the goal of matching diagonal flow impeller. The maximum adiabatic efficiency of the three schemes exceeds 82% and the maximum total pressure ratio exceeds 5.6. The static pressure recovery coefficient of most operating conditions is greater than 0.6. The total pressure Recovery factor greater than 0.92. Among them, Z16 program aerodynamic performance of the best.