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2013 (Vol. 6, Issue: 06)
Article Information:

Fluid Dynamics Characteristics during Stall Inception Process in a Centrifugal Fan

Lei Zhang, Qian Zhang and Chenxing Hu
Corresponding Author:  Lei Zhang 

Key words:  Centrifugal fan, numerical, stall inception, simulation, volute tongue, ,
Vol. 6 , (06): 1059-1064
Submitted Accepted Published
October 31, 2012 December 21, 2012 June 30, 2013

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.
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  Cite this Reference:
Lei Zhang, Qian Zhang and Chenxing Hu, 2013. Fluid Dynamics Characteristics during Stall Inception Process in a Centrifugal Fan.  Research Journal of Applied Sciences, Engineering and Technology, 6(06): 1059-1064.
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ISSN (Online):  2040-7467
ISSN (Print):   2040-7459
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