超低转速轴流压缩机气动设计
Aerodynamic Design of Ultra-low Rotating Speed Axial Compressor
杨磊 1周正贵1
作者信息
- 1. 南京航空航天大学 能源与动力学院,江苏 南京 210016
- 折叠
摘要
压缩机转速越低转子叶片离心力越小、结构强度要求越低、噪声越低.利用一种负出气角超弯扩压叶型,进行压缩机转子叶片设计,达到给定压比、流量,实现压缩机超高负荷、超低转速.选定设计载荷系数为 1.147,大幅度高于常规载荷系数 0.4;在二维叶型和三维叶片设计过程中采用自动优化设计方法.计算机数值模拟结果表明:所设计的压缩机级可达到给定的设计点流量和压比,具有较高的级效率;由于转子叶片通道后段收敛不易产生流动分离,具有很大的喘振裕度.
Abstract
The lower the compressor speed is,the smaller the centrifugal force of the rotor blade,the lower the structural strength requirement,and the lower the noise is.A super-curved diffuser blade profile with negative outlet angle is used to design the compressor rotor blades to achieve the given pressure ratio,flow rate,ultra-high load and ultra-low speed of the compressor.The selected design load factor is 1.147,much higher than the conventional load factor of 0.4.The automatic optimization design method is adopted in the design process of 2D blade profile and 3D blade.The computer numerical simulation results show that the designed compressor stage can achieve the flow rate and pressure ratio at the given design point with higher stage efficiency.And flow separation is not easy to produce due to the convergence of the rear section of the rotor blade channel,which has a large surge margin.
关键词
轴流压缩机/三维叶片/二维叶型/气动设计/优化设计Key words
axial compressor/3D blade/2D blade profile/aerodynamic design/optimization design引用本文复制引用
基金项目
国家科技重大专项项目(2017-H-0001-0013)
出版年
2024
国家科技期刊平台
NSTL
万方数据