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TECHNICAL PAPERS

Impact of Geometric Variability on Axial Compressor Performance

[+] Author and Article Information
Victor E. Garzon, David L. Darmofal

Department of Aeronautics and Astronautics, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139

J. Turbomach 125(4), 692-703 (Dec 01, 2003) (12 pages) doi:10.1115/1.1622715 History: Received December 01, 2002; Revised March 01, 2003; Online December 01, 2003
Copyright © 2003 by ASME
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References

Lykins, C., Thompson, D., and Pomfret, C., 1994, “The Air Force’s Application of Probabilistics to Gas Turbine Engines,” AIAA paper 94-1440-CP.
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Jolliffe, I. T., 1986, Principal Component Analysis, Springer Verlag, New York.
Trefethen, L. N., and Bau, D., 1997, Numerical Linear Algebra, Society for Industrial and Applied Mathematics, Philadelphia, PA.
Drela, M., and Youngren, H., 2001, XFOIL 6.9 User Guide, Dept. of Aeronautics and Astronautics, Massachusetts Institute of Technology, 77 Massachusetts Ave, Cambridge MA 02139.
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Drela, M., 1985, “Two-Dimensional Transonic Aerodynamic Design and Analysis Using the Euler Equations,” Ph.D. thesis, Massachusetts Institute of Technology.
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Denton,  J. D., 1993, “The 1998 IGTI Scholar Lecture: Loss Mechanisms in Turbomachines,” ASME J. Turbomach., 115, pp. 621–656.
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Garzon, V. E., and Darmofal, D. L., 2001, “Using Computational Fluid Dynamics in Probabilistic Engineering Design,” AIAA paper 2001-2526.
Drela, M., 1997, A User’s Guide to MTFLOW 1.2, Dept. of Aeronautics and Astronautics, Massachusetts Institute of Technology, 70 Vassar ST, Cambridge MA 02139.
Merchant, A., 1999, “Design and Analysis of Axial Aspirated Compressor Stages,” Ph.D. thesis, Massachusetts Institute of Technology, 77 Massachusetts Ave, Cambridge MA 02139.
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Figures

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IBR mid-span section: PCA modes
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IBR mid-span section: Scaled mode 1
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IBR mid-span section: Scaled mode 3
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Eigenvalues of covariance matrix versus number of samples. Average eigenvalues (—), ±2σ interval about the mean (-.-) and ±10% accuracy bands (- - -).
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IBR Pressure Coefficient, M1=0.90, axial velocity-density ratio (AVDR): 1.27
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IBR: Loss and turning histograms
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IBR: Mean and standard deviation versus noise amplitude
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IBR: Impact of geometric variability on loss coefficient distribution, a=1,2,[[ellipsis]],8
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IBR: Impact of geometric variability on turning distribution, a=1,2,[[ellipsis]],8
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IBR: Effect of geometric variability on momentum thickness. Mean indicated by solid lines, one-standard deviation interval by error bars. [SS]: suction side, [PS]: pressure side.
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IBR: Effect of geometric variability on boundary layer entropy generation as per Eq. (10). Mean indicated by solid lines, one-standard deviation interval by error bars. [SS]: suction side, [PS]: pressure side.
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IBR mid section: Statistics versus number of PCA modes, a=5
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IBR: Loss coefficient and turning angle versus incidence, a=5
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Measured deviations for sample point and flank-milled IBR

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