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NUMERICAL STUDY ON THE UNSTEADY INTERACTION FLOW IN A CENTRIFUGAL COMPRESSOR STAGE 被引量:3

NUMERICAL STUDY ON THE UNSTEADY INTERACTION FLOW IN A CENTRIFUGAL COMPRESSOR STAGE
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摘要 Numerical simulation on the unsteady flow in a centrifugal compressor isperformed, and compared with the experimental data. The influence of the impeller-diffuserinteraction on the flow-fields is discussed, and the reasons for the losses are also explored.Results show that qualitative and quite fair quantitative agreements are achieved between thepredicted and measured flowfields. The influence of the impeller wake on the convexity surface ofdiffuser is great. The potential repercussion of the diffuser on the suction surface of the impelleris much larger than on the pressure surface. Effect of the unsteady interaction is strongest in theradial gap. The unsteady flow itself may compensate for the loss generated in stage, and the stageefficiency is inversely proportional to the entropy production. Numerical simulation on the unsteady flow in a centrifugal compressor isperformed, and compared with the experimental data. The influence of the impeller-diffuserinteraction on the flow-fields is discussed, and the reasons for the losses are also explored.Results show that qualitative and quite fair quantitative agreements are achieved between thepredicted and measured flowfields. The influence of the impeller wake on the convexity surface ofdiffuser is great. The potential repercussion of the diffuser on the suction surface of the impelleris much larger than on the pressure surface. Effect of the unsteady interaction is strongest in theradial gap. The unsteady flow itself may compensate for the loss generated in stage, and the stageefficiency is inversely proportional to the entropy production.
出处 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2004年第4期609-613,共5页 中国机械工程学报(英文版)
基金 ThisprojectissupportedbyNationalNaturalScienceFoundationofChina(No.50276047).
关键词 Impeller-diffuser interaction UNSTEADY LOSS Impeller-diffuser interaction Unsteady Loss
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参考文献4

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同被引文献43

  • 1BaoshanZhu,KyojiKamemoto.Numerical simulation of unsteady interaction of centrifugal impeller with its diffuser using Lagrangian discrete vortex method[J].Acta Mechanica Sinica,2005,21(1):40-46. 被引量:5
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