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An Unsteady Numerical Investigation on the Hysteresis Stall Loop of a Counter-Rotating Compressor

[+] Author Affiliations
Zhuoqi Wang, Wei Yuan, Qiushi Li, Yajun Lu

Beijing University of Aeronautics and Astronautics, Beijing, China

Paper No. IMECE2011-62036, pp. 801-806; 6 pages
  • ASME 2011 International Mechanical Engineering Congress and Exposition
  • Volume 6: Fluids and Thermal Systems; Advances for Process Industries, Parts A and B
  • Denver, Colorado, USA, November 11–17, 2011
  • Conference Sponsors: ASME
  • ISBN: 978-0-7918-5492-1


For investigating the flow phenomena in the stall process, a full annular unsteady numerical simulation has been carried out on a low speed counter-rotating compressor. The numerical results are in good agreement with experimental results. According to the CFD results, the stall inception was found in the tip region of the front rotor. The rotating speed of stall cells in the front rotor are about 41% of the rotor speed and the direction is the same with the rotor rotating direction. The stall cells occupies about 20% of the blade span away from the casing wall when the compressor is in deep stall. The flow phenomena is well captured which explained why the compressor characteristic line appears as a hysteresis loop in the stall inception-recovery process.

Topics: Compressors



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