小流量多级轴流压气机气动性能的数值分析

Numerical Analysis on Aerodynamic Performance of a Small Flow Multi-Stage Axial Compressor

以某小流量8级轴流压气机的气动设计方案为研究对象,采用三维粘性数值模拟方法进行了设计转速的气动性能计算,并将数值结果与设计方案进行了深入的对比分析。数值研究表明:该压气机的堵塞流量、总压比及效率均低于设计目标,前4级的设计和匹配是压气机堵塞流量较小的主要原因,后4级的设计和匹配是压气机总压比较低的主要原因。多级轴流压气机的匹配是性能达标的关键,需进行进一步的分析和改进。

Taking the aerodynamic design of an 8-stage axial compressor with a small flow rate as the re-search object, its aerodynamic performance at the design speed was calculated by using a three-dimension-al viscous numerical simulation, and comparison analysis between numerical results and the design plan was performed. The numerical studies show that the mass flow, total pressure ratio and the efficiency at de-sign point have failed to meet their design goal. The design and match of the first 4 stages are the main rea-sons for the low mass flow, while that of the last 4 stages are the main cause for the low total pressure ratio. The stage match well is essential to the performance of a multi-stage axial compressor and requires further analysis and improvement.