This paper presents a new methodology for quantifying compressor endwall blockage and an approach, using this quantification, for defining the links between design parameters, flow conditions, and the growth of blockage due to tip clearance flow. Numerical simulations, measurements in a low-speed compressor, and measurements in a wind tunnel designed to simulate a compressor clearance flow are used to assess the approach. The analysis thus developed allows predictions of endwall blockage associated with variations in tip clearance, blade stagger angle, inlet boundary layer thickness, loading level, loading profile, solidity, and clearance jet total pressure. The estimates provided by this simplified method capture the trends in blockage with changes in design parameters to within 10 percent. More importantly, however, the method provides physical insight into, and thus guidance for control of, the flow features and phenomena responsible for compressor endwall blockage generation.

1.
Adamczyk
J. J.
,
Celestina
M. L.
,
Beach
T. A.
, and
Barnett
M.
,
1989
, “
Simulation of Three-Dimensional Viscous Flow Within a Multistage Turbine
,”
ASME JOURNAL OF TURBOMACHINERY
, Vol.
112
, pp.
370
376
.
2.
Baldwin, B., and Lomax, H., 1978, “Thin Layer Approximation and Algebraic Model for Separated Turbulent Flows,” AIAA Paper No. 78-257.
3.
Crook
A. J.
,
Greitzer
E. M.
,
Tan
C. S.
, and
Adamczyk
J. J.
,
1993
, “
Numerical Simulation of Compressor Endwall and Casing Treatment Flow Phenomena
,”
ASME JOURNAL OF TURBOMACHINERY
, Vol.
115
, pp.
501
512
.
4.
Cumpsty, N. A., 1989, Compressor Aerodynamics, Longman Scientific and Technical Publications.
5.
Dring
R. P.
,
1984
, “
Blockage in Axial Compressors
,”
ASME Journal of Engineering for Gas Turbines and Power
, Vol.
106
, pp.
712
714
.
6.
Hill, P. G., Schaub, U. W., and Senoo, Y., 1963, “Turbulent Wakes in Pressure Gradients,” ASME Journal of Applied Mechanics, pp. 518–524.
7.
Horlock
J. H.
, and
Greitzer
E. M.
,
1983
, “
Non-uniform Flows in Axial Compressors Due to Tip Clearance Variation
,”
Proc. IMechE
, Vol.
197C
, pp.
173
178
.
8.
Johnson
M. C.
, and
Greitzer
E. M.
,
1987
, “
Effects of Slotted Hub and Casing Treatments on Compressor Endwall FlowFields
,”
ASME JOURNAL OF TURBOMACHINERY
, Vol.
109
, pp.
380
387
.
9.
Khalid, S. A., 1995, “The Effects of Tip Clearance on Axial Compressor Pressure Rise,” Internal Gas Turbine Laboratory Report.
10.
Khalsa, A. S., 1996, “Endwall Blockage in Axail Compressors,” Ph.D. thesis, Department of Aeronautics and Astronautics, Massachusetts Institute of Technology.
11.
Kirtley, K. R., Beach, T. A., and Adamczyk, J. J., 1990, “Numerical Analysis of Secondary Flow in a Two-Stage Turbine,” AIAA Paper No. 90-2356.
12.
Koch
C. C.
,
1981
, “
Stalling Pressure Rise Capability of Axial Flow Compressor Stages
,”
ASME Journal of Engineering for Power
, Vol.
103
, pp.
645
656
.
13.
Martinez-Sanchez, M., and Gauthier, R. P., 1990, “Blade Scale Effects of Tip Leakage,” Gas Turbine Laboratory Report #202.
14.
Rediniotis
O. K.
,
Hoang
N. T.
, and
Telionis
D. P.
,
1993
, “
The Seven-Hole Probe: Its Calibration and Use
,”
Instructional Fluid Dynamic Experiments
, ASME FED-Vol.
152
, pp.
21
26
.
15.
Schweitzer
J. K.
, and
Garberoglio
J. E.
,
1984
, “
Maximum Loading Capability of Axial Flow Compressors
,”
J. Aircraft
, Vol.
21
, No.
8
, pp.
593
600
.
16.
Smith
G. D. J.
, and
Cumpsty
N. A.
,
1984
, “
Flow Phenomena in Compressor Casing Treatment
,”
ASME Journal of Engineering for Gas Turbines and Power
, Vol.
106
, pp.
532
541
.
17.
Smith, L. H., Jr., 1970, “Casing Boundary Layers in Multistage Axial-Flow Compressors,” Flow Research in Blading, L. S. Dzung, ed., Elsevier, Amsterdam.
18.
Storer
J. A.
, and
Cumpsty
N. A.
,
1991
, “
Tip Leakage Flow in Axial Compresors
,”
ASME JOURNAL OF TURBOMACHINERY
, Vol.
113
, pp.
252
259
.
19.
Strazisar, A. J., Wood, J. R., Hathaway, M. D., and Suder, K. L., 1989, “Laser Anemometer Measurements in a Transonic Axial-Flow Fan Rotor,” NASA TP-2879.
20.
Suder
K.
,
1998
, “
Blockage Development in a Transonic, Axial Compressor Rotor
,”
ASME JOURNAL OF TURBOMACHINERY
, Vol.
120
, pp.
465
476
.
21.
Wisler, D. C., 1977, “Core Compressor Exit Stage Study, Vol. I—Blading Design,” NASA CR-135391.
22.
Wisler, D. C., 1981, “Core Compressor Exit Stage Study, Vol. IV—Data and Performance Report for the Best Stage Configuration,” NASA CR-165357.
23.
Wisler, D. C., 1985, “Aerodynamic Effects of Tip Clearance, Shrouds, Leakage Flow, Casing Treatment and Trenching in Compressor Design,” Von Karman Institute Lecture Series 1985-05 on Tip Clearance Effects in Axial Turbomachinery.
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