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TECHNICAL PAPERS

Nonuniform Flow in a Compressor Due to Asymmetric Tip Clearance

[+] Author and Article Information
Seung Jin Song, Seung Ho Cho

School of Mechanical and Aerospace Engineering, Seoul National University, Seoul 151-742, Korea

J. Turbomach 122(4), 751-760 (Feb 01, 2000) (10 pages) doi:10.1115/1.1308569 History: Received February 01, 2000
Copyright © 2000 by ASME
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References

Thomas,  H. J., 1958, “Unstable Natural Vibration of Turbine Rotors Induced by the Clearance Flow in Glands and Blading,” Bull. de I’A.I.M., 71, No. 11/12, pp. 1039–1063.
Alford,  J., 1965, “Protecting Turbomachinery From Self-Excited Rotor Whirl,” ASME J. Eng. Power, 87, pp. 333–334.
Urlichs, K., 1983, “Clearance Flow Generated Transverse Forces at the Rotors of Thermal Turbomachines,” NASA TM-77292.
Wohlrab, R., 1983, “Experimental Determination of Gap-Flow Conditioned Forces at Turbine Stages, and Their Effect on the Running Stability of Simple Rotors,” NASA TM-77293.
Martinez-Sanchez,  M., Jaroux,  B., Song,  S. J., and Yoo,  S., 1995, “Measurement of Turbine Blade-Tip Rotordynamic Excitation Forces,” ASME J. Turbomach., 117, pp. 384–393.
Song,  S. J., and Martinez-Sanchez,  M., 1997, “Rotordynamic Forces Due to Turbine Tip Leakage: Part 1–Blade Scale Effects,” ASME J. Turbomach., 119, pp. 695–703.
Song,  S. J., and Martinez-Sanchez,  M., 1997, “Rotordynamic Forces Due to Turbine Tip Leakage: Part 2—Radius Scale Effects and Experimental Verification,” ASME J. Turbomach., 119, pp. 704–713.
Horlock,  J. H., and Greitzer,  E. M., 1983, “Non-Uniform Flows in Axial Compressors Due to tip Clearance Variation,” Proc. Inst. Mech. Eng., 197C, pp. 173–178.
Colding-Jorgensen,  J., 1992, “Prediction of Rotordynamic Destabilizing Forces in Axial Flow Compressors,” ASME J. Fluids Eng., 114, pp. 621–625.
Ehrich,  F. F., 1993, “Rotor Whirl Forces Induced by the Tip Clearance Effect in Axial Flow Compressor,” ASME J. Vibr. Acoust., 115, pp. 509–515.
Graf,  M. B., Wong,  T. S., Greitzer,  E. M., Marble,  F. E., Tan,  E. S., Shin,  H. W., Wisler,  D. C., 1998, “Effects of Nonaxisymmetric Tip Clearance on Axial Compressor Performance and Stability,” ASME J. Turbomach., 120, pp. 648–661.
Park, K. Y., 1998, “Non-uniform Compressor Flow Fields Induced by Non-axisymmetric Tip Clearance,” M.S. Thesis, Department of Aerospace Engineering, Inha Univ. Korea.
Storace, A., et al., 2000, “Unsteady Flow and Whirl-Inducing Forces in Axial-Flow Compressors; Part 1—Experiment,” ASME Paper No. 2000-GT-565.
Martinez-Sanchez, M., and Gauthier, R. P., 1990, “Blade Scale Effects of Tip Leakage,” Gas Turbine Laboratory Report #202, M.I.T.
Chen, G. T., 1991, “Vortical Structures in Turbomachinery Tip Clearance Flows,” Ph.D. thesis, Department of Aeronautics and Astronautics, M.I.T.
Roh, H. Y., 1997, “Blade Scale Effects of Tip Leakage Flow in Axial Compressors,” B.S. Thesis, Department of Aerospace Engineering, Inha Univ., Korea.
Hunter,  I. H., and Cumpsty,  N. A., 1982, “Casing Wall Boundary-Layer Development Through an Isolated Compressor Rotor,” ASME J. Eng. Power, 104, pp. 805–818.
Ehrich, F. F., et al., 2000, “Unsteady Flow and Whirl-Inducing Forces in Axial-Flow Compressors; Part 2—Analysis,” ASME Paper No. 2000-GT-566.

Figures

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Blade and radius scale views of a compressor stage
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Schematic of the tip clearance flow model of Martinez-Sanchez 14
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Geometry of compressor tip vortex roll up
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Coordinate system for the model
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Radial distributions of axial velocity, absolute tangential velocity, and relative flow angle at rotor exit predicted by the new RSC model
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Radial distributions of axial velocity, absolute tangential velocity, and absolute flow angle at stator exit predicted by the new RSC model
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Radial distributions of axial velocity, absolute tangential velocity, and relative flow angle at rotor exit predicted by the RC model of Park 12
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Radial distributions of axial velocity, absolute tangential velocity, and absolute flow angle at stator exit predicted by the RC model of Park 12
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Upstream axial velocity perturbation versus azimuthal angle
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Upstream pressure perturbation versus azimuthal angle
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Rotor blade loading perturbation versus azimuthal angle
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Perturbation in the average pressure on rotor hub versus azimuthal angle
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Predicted total and pressure rotordynamic coefficients versus operating flow coefficient
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Predicted cross rotordynamic coefficients due to blade loading perturbation versus operating flow coefficient
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Predicted total and pressure rotordynamic coefficients versus design flow coefficient
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Predicted total and pressure rotordynamic coefficients versus design work coefficient
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Predicted total and pressure rotordynamic coefficients versus design reaction

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