华东理工大学学报（自然科学版）2017，Vol.43Issue(2)：266-272,7.DOI:10.14135/j.cnki.1006-3080.2017.02.019
不同出口角度扩压器的内部流动及离心压缩机级性能数值研究
Numerical Study of the Different Outlet Angles of Diffuser and Performance of Centrifugal Compressor
赵志伟 1苏永升1
作者信息
- 1. 华东理工大学承压系统与安全教育部重点实验室,上海200237
- 折叠
摘要
Abstract
Based on the first stage of centrifugal compressor,the effects of outlet angles of diffuser on the stage performance were investigated by the numerical simulation.The performance curves at stage with different outlet angle were measured.The internal flow and the total pressure loss on the stage were analyzed,and by comparison of pressure recovery coefficient of different vaned diffusers to judge diffusion effect.The results show that the increase of outlet angle makes the performance curve move toward the large flow rate side,and the peak stage efficiency and pressure ratio increase firstly and then decrease.The diffusion effect of vaned diffuser depends upon flow condition during different operations.When the flow mass is larger than the design level,the separation zone generates near the shroud of diffuser,and the different vortex regions enlarge with the outlet angle of diffuser.When the flow mass is smaller than the design level,the separation zone is firstly emerged in large outlet angle at vaned diffuser.关键词
叶片扩压器/出口安装角/性能曲线/压力恢复系数Key words
vane diffuser/outlet angles/performance map/pressure recovery coefficient分类
机械制造引用本文复制引用
赵志伟,苏永升..不同出口角度扩压器的内部流动及离心压缩机级性能数值研究[J].华东理工大学学报（自然科学版）,2017,43(2):266-272,7.
