A Review of Rotating Stall in Vaneless Diffuser of Centrifugal Compressor

• 作 者: ZHANG Lei HE Ruiyang WANG Songling ZHANG Qian
• 机 构: School of Energy, Power & Mechanical Engineering, North China Electric Power University, Baoding 071
• 出 处: 热科学学报（英文版）
• 发表日期: 2004年期
• 关键词: centrifugal compressor vaneless diffuser rotating stall reverse flow pressure fl

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 vane[ess 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.