The end-wall blockage in axial compressors has been the subject of several investigations over a period of many years. This paper reviews and compares various approaches to determining the blockage, particularly in the “repeating” stage, a stage deeply embedded in the compressor where an equilibrium state is reached, the flow through any one stage repeating in the next. These approaches include: (i) correlations of displacement thickness measured in compressor rigs; (ii) a relationship between outlet blockage and the clearance area, based both on an empirical development of a simple model of the flow through the clearance space and full CFD calculations of the flow; (iii) momentum analysis of the flow through the blockage region, developed from the boundary layer analyses of some years ago, but not now relying on boundary layer concepts. [S0889-504X(00)01502-6]
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April 2000
Technical Papers
The Determination of End-Wall Blockage in Axial Compressors: A Comparison Between Various Approaches
J. H. Horlock
J. H. Horlock
Whittle Laboratory, Cambridge, United Kingdom
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J. H. Horlock
Whittle Laboratory, Cambridge, United Kingdom
Contributed by the International Gas Turbine Institute for publication in the JOURNAL OF TURBOMACHINERY. Manuscript received at ASME Headquarters December 6, 1999. Associate Technical Editor: T. H. Okiishi.
J. Turbomach. Apr 2000, 122(2): 218-224 (7 pages)
Published Online: December 6, 1999
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Received:
December 6, 1999
Citation
Horlock, J. H. (December 6, 1999). "The Determination of End-Wall Blockage in Axial Compressors: A Comparison Between Various Approaches ." ASME. J. Turbomach. April 2000; 122(2): 218–224. https://doi.org/10.1115/1.555452
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