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- Title
Numerical Investigation on a Axial Slot Casing Treatment of a Large Circumferential Interval and Small Opening Area.
- Authors
Liu, Zepeng; Huang, Guoping; Musa, Omer
- Abstract
Axial slot casing treatment is a common method to extend the stall margin of a compressor. Based on the mechanism of unsteady flow control, this paper redesigns axial slots with large circumferential interval and small opening area. To test the effect of this axial slot structure, unsteady numerical simulations were carried out with different slot areas and circumferential intervals. The results show that this novel axial slot casing treatment can significantly improve compressor stall margin. Meanwhile, compared with the traditional axial slot, the efficiency loss is greatly reduced. The flow field analysis shows that the new axial slot structure proposed in this paper can suppress the development of tip leakage vortex and unsteadiness in the tip region at the near stall condition through decreasing the tip loading periodically. Moreover, we find that the slot area is proportional to the improvement of stability margin. Under the same slot area, an excessive number of slots is not conducive to the improvement of the stability margin.
- Subjects
RETRIEVAL practice; UNSTEADY flow; COMPRESSORS; COMPUTER simulation
- Publication
Energies (19961073), 2021, Vol 14, Issue 19, p6181
- ISSN
1996-1073
- Publication type
Article
- DOI
10.3390/en14196181