| 田红艳，侯康，佟鼎，刘欣源.进口端壁导叶对离心压气机特性影响研究[J].内燃机工程,2021,42(6):95-102. |
| Effect of Inlet End Wall Guide Vanes on the Performance of Centrifugal Compressor |
| DOI：10.13949/j.cnki.nrjgc.2021.06.013 |
| Key Words:end-wall guide vanes centrifugal compressor flow characteristic numerical simulation |
| Author Name | Affiliation | | TIAN Hongyan, HOU Kang, TONG Ding, LIU Xinyuan | 1.National Engineering Research Center for Technological Innovation Method and Tool, School of Mechanical Engineering, Hebei University of Technology, Tianjin 300401, China；2.National Key Laboratory of Diesel Engine Turbocharging Technology, China North Engine Research Institute, Tianjin 300400, China |
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| Abstract:The effect of inlet end-wall guide vanes on the performance of centrifugal compressor was researched. The characteristics of initial compressor were tested by bench test, which could be used for simulation model calibration. On this basis, the flow characteristics of compressor were discussed in detail. The analysis results show that the blocking flow and surge flow are moved to low part by positive guide vanes， which effectively improves the stability of the centrifugal compressor. Opposite to it，the flow characteristics are moved to large part by negative guide vanes. The relative flow angle at impeller inlet are changed obviously by introducing end-wall guide vanes. The positive pre-rotation can reduce the incidence angle of inlet airflow, and improve the efficiency of centrifugal compressor. The negative pre-rotation makes compressors efficiency worse oppositely. Although positive guide vanes reduce the choke flow rate of centrifugal compressor slightly, but they can improve the stability and efficiency obviously. The results have been verified by test to confirm the correctness of the theoretical results. |
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