Fluid dynamics characteristics during stall inception process in a centrifugal fan

Lei Zhang*, Qian Zhang, Chenxing Hu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

Based on the three-dimensional elliptic governing equations and the throttle model, an unsteady numerical simulation of rotating stall is undertaken in the case of G4-73 type centrifugal fan and the correctness of simulation results is verified by experiments. In this study a new rotating stall inception criterion is put forward, that the inlet flow or outlet back pressure fluctuations gradually increase in the value range. Numerical results show that the stall inception comes in obvious modal waveform, which belongs to the suction side stall caused by the incident angle changes due to the decrease of the flow. The relative velocity distribution of the impeller at different times indicates that the first bottleneck area occurs in the impeller channel near the volute tongue, while the other flow passages get improved and the flow field is unevenly distributed along the circumferential direction.

Original languageEnglish
Pages (from-to)1059-1064
Number of pages6
JournalResearch Journal of Applied Sciences, Engineering and Technology
Volume6
Issue number6
DOIs
Publication statusPublished - 2013
Externally publishedYes

Keywords

  • Centrifugal fan
  • Numerical
  • Simulation
  • Stall inception
  • Volute tongue

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