The Determination of End-Wall Blockage in Axial Compressors: A Comparison Between Various Approaches

[+] Author and Article Information
J. H. Horlock

Whittle Laboratory, Cambridge, United Kingdom

J. Turbomach 122(2), 218-224 (Dec 06, 1999) (7 pages) doi:10.1115/1.555452 History: Received December 06, 1999
Copyright © 2000 by ASME
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Khalid,  S. A., Khalsa,  A. S., Waitz,  I. A., Tan,  C. S., Greitzer,  E. M., Cumpsty,  N. A., Adamczyk,  J. J., and Marble,  F. E., 1999, “Endwall Blockage in Axial Compressors,” ASME J. Turbomach., 121, pp. 499–509.
Smith, L. H., 1970, “Casing Boundary Layers in Multistage Axial-Flow Compressors,” in: Flow Research in Blading, L. S. Dzung, ed., Elsevier, Amsterdam, p. 275.
Stratford, B. S., 1967, “The Use of Boundary-Layer Techniques to Calculate the Blockage From the Annulus Boundary Layer in a Compressor,” ASME Paper No. 67-WA/GT-7.
Horlock, J. H., and Perkins, H. J., 1974, “Annulus Wall Boundary Layers in Turbomachines,” AGARDograph AG-185.
Cumpsty,  N. A., 1986, “Annulus Wall Boundary-Layer Measurements in a Four-Stage Compressor,” ASME J. Eng. Gas Turbines Power, 108, pp. 2–6.
McKenzie, A. B., 1956, “Initial Tests on the Four Stage Experimental Compressor,” Rolls Royce Internal Report No. 43A/101; see also 1981, Proc. Inst. Mech. Eng., 194, pp. 103–111.
Howard,  M. A., Ivey,  P. C., Barton,  J. P., and Young,  K. F., 1994, “Endwall Effects at Two Tip Clearances in a Multistage Axial-Flow Compressor With Controlled Diffusion Blading,” ASME J. Turbomach., 106, pp. 635–647.
Horlock,  J. H., 1995, “Secondary Flow in the Repeating Stages of Axial Turbomachines,” Proc. Inst. Mech. Eng., 209, pp. 101–110.
Bolger, J. J., and Horlock, J. H., 1995, “Predictions of the Flow in Repeating Stages of Axial Compressors Using Navier–Stokes Solvers,” ASME Paper No. 95-GT-199.
Dawes,  W. N., 1987, “A Numerical Analysis of the Three-Dimensional Viscous Flow in a Transonic Compressor and Comparison With Experiment,” ASME J. Turbomach., 109, pp. 83–90.
Denton,  J. D., 1992, “The Calculation of Three Dimensional Viscous Flow Through Multistage Turbomachines,” ASME J. Turbomach., 114, pp. 18–26.
Denton, J. D., 1995, private communication.
Cumpsty, N. A., 1989, Compressor Aerodynamics, Longman, London.
Lakshminarayana, B., and Horlock, J. H., 1965, “Leakage and Secondary Flows in Compressor Cascades,” ARC R&M 3483.
Adkins,  G. G., and Smith,  L. H., 1982, “Spanwise Mixing in Axial-Flow Turbomachines,” ASME J. Eng. Power, 104, pp. 97–110.
Storer,  J. A., and Cumpsty,  N. A., 1991, “Tip Leakage Flow in Axial Compressors,” ASME J. Turbomach., 113, pp. 252–259.
Hunter,  I. H., and Cumpsty,  N. A., 1982, “Casing Wall Boundary Layer Development Through an Isolated Compressor Row,” ASME J. Eng. Power, 104, pp. 805–817.


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Smith’s experimental data for blockage as presented by Cumpsty, with some of his own data added (shown by larger symbols)
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Denton’s calculations of axial velocity profiles in the Cranfield compressor (after third rotor and third stator)
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Retained lift and corresponding values of K
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Simple blockage model used by Khalid et al.
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Predictions of change in displacement thickness compared with Smith’s data
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Predictions of change in displacement thickness as functions of blade row pressure rise coefficient Cps to: present analysis and correlation of Khalid et al.




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