南京航空航天大学学报2025，Vol.57Issue(4)：649-657,9.DOI:10.16356/j.1005-2615.2025.04.007
离心压气机紧凑型扩压器改型设计及优化
Re-design and Optimization for a Compact Diffuser in Centrifugal Compressors
徐一帆 1李传鹏 1冯杰 1屠宝锋1
作者信息
- 1. 南京航空航天大学能源与动力学院,南京 210016
- 折叠
摘要
Abstract
An integrated blade diffuser design and optimization method is developed for a compact channel diffuser of centrifugal compressors.The hub curve,originally in the form of a"straight-arc-straight"configuration as seen in conventional diffusers,is transformed into a"bulged"shape constructed one using Bezier curves.This modification reduces the curvature of the hub's turning section,suppressing flow separation at the hub while maintaining a small radial diameter for the diffuser.Additionally,the leading-edge radius is increased to expand the radial clearance between the rotor and stator.The diffuser blades are divided into the front,the middle,and the rear sections for optimization parameter exploration.Four sets of parameters are selected for optimization.Numerical simulations reveal that after optimization,the centrifugal compressor's pressure ratio at the design points increased by 1.84%,the efficiency is improved by 2.5%,and the surge margin is increased by 8.13%.关键词
离心压气机/紧凑型扩压器/扩压器改型设计/效率优化/优化设计Key words
centrifugal compressor/compact diffuser/diffuser re-design/efficiency optimization/optimization design分类
航空航天引用本文复制引用
徐一帆,李传鹏,冯杰,屠宝锋..离心压气机紧凑型扩压器改型设计及优化[J].南京航空航天大学学报,2025,57(4):649-657,9.
