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ZHU Xiaocheng
GUO Qiang
DU Zhaohui
School of Mechanical Engineering,
Shanghai Jiaotong University,
Shanghai 200030, China
CHEN Hua
ZHAO Yan
Honeywell Corporation,
Shanghai 200030, China
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EXPERIMENTAL
INVESTIGATION OF
ROTATING STALL FOR A LOW-SPEED CENTRIFUGAL COMPRESSOR*
Abstract:
Unsteady flows and rotating stall of a low-speed centrifugal compressor are investigated by measuring vaneless diffuser wall static pressure fluctuation and internal flow fields at different small flow fluxes. During the experiment, firstly the real time static pressure fluctuations on the vaneless diffuser shroud at different circumferential and radial position were acquired by high-frequency dynamic pressure transducers. Discrete Fourier transformation analysis and cross-correlation analysis were applied to the experimental results to ascertain the rotating stall beginning operation conditions and stall cells numbers and rotating speed. Secondly, the vaneless diffuser inlet flow angle distribution along diffuser width direction was acquired by single hotwire, which was compared with SENOO’s analysis results. At last, the internal flow fields of the centrifugal compressor were investigated with a particle image velocimetry (PIV) system at different small flow fluxes. The flow field development of vaneless diffuser and blade flow passage are given at rotating stall conditions. The experiments enrich the understanding of rotating stall flow phenomenon of the low-speed centrifugal compressor and provide full experiment data for designing high performance centrifugal compressor.
Key words:
Rotating stall Centrifugal compressor Vaneless diffuser
Particle image velocimetry (PIV)
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Biographical notes
ZHU Xiaocheng is currently an associate professor in School of
Mechanical Engineering, Shanghai Jiaotong University, China. He
dedicates on the research of turbomachinery.
Tel: +86-21-64479155, +86-13564365359; E-mail: zhxc@sjtu.edu.cn
GUO Qiang is currently a PhD candidate in
School of Mechanical Engineering, Shanghai Jiaotong University, China.
He dedicates on the research of turbomachinery.
DU Zhaohui is currently a professor in
School of Mechanical Engineering, Shanghai Jiaotong University, China.
He dedicates on the research of turbomachinery.
CHEN Hua is currently a senior engineer in
Honeywell Inc., China.
ZHAO Yan is currently an aero engineer in
Honeywell Inc., China.
References
[1] TRAMM P C, DEAN JR R C. Centrifugal compressor and pump stability,
stall and surge [M]. New York: ASME, 1976.
[2] LAKSHMINARAYANA B, RUNSTADLER P Jr. Measurement methods in rotating
components of turbomachinery[M]. New York: ASME, 1980.
[3] JANSEN W. Steady fluid flow in a radial vaneless diffuser [J].
Journal of Basic Engineering, 1964 (86): 607-619.
[4] SENOO Y, ISHIDA M. Behavior of severely asymmetric flow in a
vaneless diffuser [J]. Journal of Engineering for Power, 1975 (97):
375-387.
[5] TOYAMA P C, RUNSTEDLER P E JR, DEAN JR R C. An experimental study of
surge in centrifugal compressors[J]. Journal of Fluids Engineering, 1977
(99): 115-131.
[6] ABDELHAMID A N, COLWILL W H, BARROWS J F. Experimental investigation
of unsteady phenomenon in vaneless radial diffuser [J]. Journal of
Engineering for Power, 1979 (101): 52-60.
[7] VAN DEN BRAEMBUSSCHE R, FRIGNE P, ROUSTAN M. Rotating nonuniform
flow in radial compressors [R]. AGARD Cp-282, 1980.
[8] SENOO Y, KINOSHITA Y. Influence of inlet flow conditions and
geometries of centrifugal vaneless diffuser on critical flow angle for
reverse flow [J]. Journal of Fluids Engineering, 1977 (99): 98-103.
[9] SENOO Y, KINOSHITA Y. Limits of rotating stall and stall in vaneless
diffuser of centrifugal compressors [R]. ASME Paper, 78-GT-19.
[10] TAKUR S, LIN W L, WRIGHT J, et al. Computational modeling of low
pressure fan [R]. ASME Paper, 2000-GT-621.
[11] PANOE N, RIETHMULLER M L, VAN DEN BRAEMBUSSCHE R. Experimental
investigation of the flow in the vaneless diffuser of a centrifugal pump
by particle displacement velocimetry [J]. Experiment in Fluids, 1989
(7): 371-378.
[12] DEAN R C. Advanced radial compressors [R]. VKI Lecture Series 50,
1972.
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