A Review of Rotating Stall in Vaneless Diffuser of Centrifugal Compressor  

作　　者：ZHANG Lei HE Ruiyang WANG Songling ZHANG Qian 

机构地区：[1]School of Energy,Power&Mechanical Engineering,North China Electric Power University,Baoding 071003,China

出　　处：《Journal of Thermal Science》2020年第2期323-342,共20页热科学学报（英文版）

基　　金：This research was supported by National Natural Science Foundation of China(Grant No.11602085);the Fundamental Research Funds for the Central Universities of China(Grant No.2018MS107);the Natural Science Foundation of Hebei Province,China(Grant No.E2016502098).

摘　　要：At present, off-design centrifugal compressor suffers from great instabilities, such as rotating stall and surge, which lead to work failure, strong pressure fluctuations, and violent vibrations of the entire system. One cause of these instabilities is the rotating stall occurring in vaneless diffuser. In this review, recent researches on rotating stall of vaneless diffuser in centrifugal compressor are reviewed, and its inductive mechanism and characteristic description are emphatically introduced. In vaneless diffuser, the rotating stall starts up and fully develops under non-design conditions with the characteristic of increasing pressure fluctuation amplitude. The negative effects of rotating stall include reverse flow and vortex, both of which have significant effects on the instability of centrifugal compressors. Some improvement methods of rotating stall are also introduced, and a lot of examples are given. Finally, some suggestions and discussions are put forward for the future work.At present, off-design centrifugal compressor suffers from great instabilities, such as rotating stall and surge, which lead to work failure, strong pressure fluctuations, and violent vibrations of the entire system. One cause of these instabilities is the rotating stall occurring in vaneless diffuser. In this review, recent researches on rotating stall of vaneless diffuser in centrifugal compressor are reviewed, and its inductive mechanism and characteristic description are emphatically introduced. In vaneless diffuser, the rotating stall starts up and fully develops under non-design conditions with the characteristic of increasing pressure fluctuation amplitude. The negative effects of rotating stall include reverse flow and vortex, both of which have significant effects on the instability of centrifugal compressors. Some improvement methods of rotating stall are also introduced, and a lot of examples are given. Finally, some suggestions and discussions are put forward for the future work.

关 键 词：CENTRIFUGAL COMPRESSOR vaneless DIFFUSER rotating STALL reverse flow pressure FLUCTUATION 

分 类 号：TH452[机械工程—机械制造及自动化]