Theory of Compressor Stability Enhancement Using Novel Casing Treatment, Part II: Experiment

A stall precursor-suppressed casing treatment is designed to enhance stall margin for both subsonic and transonic compressors. It is noted that the open area ratio of the stall precursor-suppressed casing treatment is only 4–10%, far smaller than conventional casing treatments, with over 50% open area ratio. The effect of the novel casing treatment on the stall margin and efficiency of compressors has been investigated experimentally. The results show that the stall precursor-suppressed casing treatment can improve the stall margin by about 8–18% without significantly decreasing the efficiency of the related fan/compressors. Meanwhile, the present investigation has also attempted to reveal the mechanism of stall margin improvement with such casing treatment. It is found that the stall precursor-suppressed casing treatment will delay the nonlinear development of the stall process by suppressing the propagation of the stall precursor waves, as compared with the evolution of the precursors without casing tre...

[1]  L. Reid,et al.  Performance of single-stage axial-flow transonic compressor with rotor and stator aspect ratios of 1.63 and 1.78, respectively, and with design pressure ratio of 1.82 , 1978 .

[2]  Edward M. Greitzer,et al.  Surge and Rotating Stall in Axial Flow Compressors—Part I: Theoretical Compression System Model , 1976 .

[3]  Alan H. Epstein,et al.  Rotating Waves as a Stall inception Indication in Axial Compressors , 1991 .

[4]  H. Takata,et al.  Stall Margin Improvement by Casing Treatment—Its Mechanism and Effectiveness , 1977 .

[5]  Gang Xu,et al.  Micro Air Injection and Its Unsteady Response in a Low-Speed Axial Compressor , 2002 .

[6]  Ivor Day.  Stall inception in axial flow compressors , 1993 .

[7]  J. E. Ffowcs Williams,et al.  Review Lecture - Anti-sound , 1984 .

[8]  John E. Ffowcs Williams.  The aerodynamic potential of anti-sound , 1986 .

[9]  Edward M. Greitzer,et al.  Active suppression of aerodynamic instabilities in turbomachines , 1989 .

[10]  N. A. Cumpsty,et al.  Flow Phenomena in Compressor Casing Treatment , 1984 .

[11]  R. L. Elder,et al.  Recessed Casing Treatment Effects on Fan Performance and Flow Field , 1995 .

[12]  Ivor Day.  Active suppression of rotating stall and surge in axial compressors , 1993 .

[13]  Alan H. Epstein,et al.  Prestall Behavior of Several High-Speed Compressors , 1995 .

[14]  Tom Hynes,et al.  Stall Inception in Axial Compressors , 1990 .

[15]  Weiwei Yu,et al.  Theory of Compressor Stability Enhancement Using Novel Casing Treatment, Part I: Methodology , 2014 .

[16]  L. Valavani,et al.  Active control of rotating stall in a low-speed axial compressor , 1993 .