In this paper, the influence of nonuniform bleed extraction on the stability of an axial flow compressor is quantified. Nonuniformity can be caused by several geometric factors (for example, plenum chamber size or number of off-take ducts), and a range of configurations is examined experimentally in a single stage compressor. It is shown that nonuniform bleed leads to a circumferential distribution of flow coefficient and swirl angle at inlet to the downstream stage. The resultant distribution of rotor incidence causes stall to occur at a higher flow coefficient than if the same total bleed rate had been extracted uniformly around the circumference. A connection is made between the analysis of nonuniform bleed extraction and the familiar DCθ criterion used to characterize inlet total pressure distortion. The loss of operating range caused by the nonuniform inlet flow correlates with the peak sector-averaged bleed nonuniformity for all the bleed configurations tested.
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October 2015
Research-Article
Bleed-Induced Distortion in Axial Compressors
S. D. Grimshaw,
S. D. Grimshaw
Whittle Laboratory,
e-mail: sdg33@cam.ac.uk
University of Cambridge
,1 JJ Thomson Avenue
,Cambridge CB3 0DY
, UK
e-mail: sdg33@cam.ac.uk
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G. Pullan,
G. Pullan
Whittle Laboratory,
University of Cambridge
,1 JJ Thomson Avenue
,Cambridge CB3 0DY
, UK
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T. Walker
T. Walker
Takasago Research and Development Centre,
Mitsubishi Heavy Industries Ltd.
,Takasago 676-8686
, Japan
Search for other works by this author on:
S. D. Grimshaw
Whittle Laboratory,
e-mail: sdg33@cam.ac.uk
University of Cambridge
,1 JJ Thomson Avenue
,Cambridge CB3 0DY
, UK
e-mail: sdg33@cam.ac.uk
G. Pullan
Whittle Laboratory,
University of Cambridge
,1 JJ Thomson Avenue
,Cambridge CB3 0DY
, UK
T. Walker
Takasago Research and Development Centre,
Mitsubishi Heavy Industries Ltd.
,Takasago 676-8686
, Japan
Contributed by the International Gas Turbine Institute (IGTI) of ASME for publication in the JOURNAL OF TURBOMACHINERY. Manuscript received May 10, 2015; final manuscript received June 8, 2015; published online July 14, 2015. Assoc. Editor: Michael Hathaway.
J. Turbomach. Oct 2015, 137(10): 101009 (9 pages)
Published Online: October 1, 2015
Article history
Received:
May 10, 2015
Revision Received:
June 8, 2015
Online:
July 14, 2015
Citation
Grimshaw, S. D., Pullan, G., and Walker, T. (October 1, 2015). "Bleed-Induced Distortion in Axial Compressors." ASME. J. Turbomach. October 2015; 137(10): 101009. https://doi.org/10.1115/1.4030809
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