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Numerical Investigation on a Axial Slot Casing Treatment of a Large Circumferential Interval and Small Opening Area

Author

Listed:
  • Zepeng Liu

    (College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China)

  • Guoping Huang

    (College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China)

  • Omer Musa

    (College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China)

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.

Suggested Citation

  • Zepeng Liu & Guoping Huang & Omer Musa, 2021. "Numerical Investigation on a Axial Slot Casing Treatment of a Large Circumferential Interval and Small Opening Area," Energies, MDPI, vol. 14(19), pages 1-18, September.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:19:p:6181-:d:644918
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    References listed on IDEAS

    as
    1. Jie Chen & Weiyu Lu & Guoping Huang & Jianfeng Zhu & Jinchun Wang, 2017. "Research on Pulsed Jet Flow Control without External Energy in a Blade Cascade," Energies, MDPI, vol. 10(12), pages 1-18, December.
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