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TECHNICAL PAPERS

Simulations of the Unsteady Flow Through the Fastrac Supersonic Turbine

[+] Author and Article Information
Lisa W. Griffin

Fluid Dynamics Analysis Branch, National Aeronautics and Space Administration, George C. Marshall Space Flight Center, Marshall Space Flight Center, AL 35802

Daniel J. Dorney

Department of Mechanical Engineering, Virginia Commonwealth University, Richmond, VA 23113

J. Turbomach 122(2), 225-233 (Feb 01, 1999) (9 pages) doi:10.1115/1.555453 History: Received February 01, 1999
Copyright © 2000 by ASME
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References

Rangwalla,  A. A., Madavan,  N. K., and Johnson,  P. D., 1992, “Application of an Unsteady Navier–Stokes Solver to Transonic Turbine Design,” J. Propul. Power, 8, No. 5, pp. 1079–1086.
Griffin, L. W., and Nesman, T., 1996, “Prediction of the Unsteady Aerodynamic Environment in the RRTT Turbine,” presented at the 14th Workshop for Fluid Dynamic Applications in Rocket Propulsion and Launch Vehicle Technology, NASA/Marshall Space Flight Center, Apr. 23–25.
Baldwin, B. S., and Lomax, H., 1978, “Thin Layer Approximation and Algebraic Model for Separated Turbulent Flow,” AIAA Paper No. 78-257.
Roe,  P. L., 1981, “Approximate Riemann Solvers, Parameter Vectors, and Difference Schemes,” J. Comput. Phys., 43, pp. 357–372.
Dorney,  D. J., Davis,  R. L., Edwards,  D. E., and Madavan,  N. K., 1992, “Unsteady Analysis of Hot Streak Migration in a Turbine Stage,” J. Propul. Power, 8, No. 2, pp. 520–529.
Dorney, D. J., 1998, “Rapid Prediction of Unsteady Three-Dimensional Viscous Flows in Turbopump Geometries,” NASA H-28721D Final Report, Mar. 21.
Dorney,  D. J., and Sondak,  D. L., 1996, “Study of Hot Streak Phenomena in Subsonic and Transonic Flow,” Int. J. Turbo Jet Engines, 13, No. 2, pp. 131–141.
Dorney,  D. J., and Schwab,  J. R., 1996, “Unsteady Numerical Simulations of Radial Temperature Profile Redistribution in a Single-State Turbine,” ASME J. Turbomach., 118, No. 4, pp. 783–791.
Dorney,  D. J., and Davis,  R. L., 1992, “Navier–Stokes Analysis of Turbine Blade Heat Transfer and Performance,” ASME J. Turbomach., 114, No. 4, pp. 795–806.
Dorney,  D. J., and Davis,  R. L., 1993, “Numerical Simulation of Turbine ‘Hot Spot’ Alleviation Using Film Cooling,” J. Propul. Power, 9, No. 3, pp. 329–336.

Figures

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Cross section of the Fastrac turbopump
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Fastrac turbine blade Campbell diagram with most responsive modes and excitations (chart by Don Harris)
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Computational geometry: (a) cross-sectional view (every third point plotted); (b) axial view of the nozzle ring exit
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Instantaneous Mach numbers at midspan: (a) turbine; (b) blade alone
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Instantaneous entropy contours at midspan
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Total velocity contours between nozzle exit and blade leading edge
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Blade pressure envelopes, small gap: (a) hub; (b) midspan; (c) tip
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Fourier decomposition of pressures for blade: (a) leading edge; (b) 20 percent axial chord
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Pressure trace for blade leading edge, midspan, small gap
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Blade pressure envelopes, large gap: (a) hub; (b) midspan; (c) tip
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Fourier decomposition of pressure for blade, large gap: (a) leading edge; (b) 20 percent axial chord
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Pressure trace for blade leading edge, midspan, large gap
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Blade pressure envelopes, large gap, uncoupled: (a) hub; (b) midspan; (c) tip
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Circumferential angle profiles: (a) blade inlet; (b) blade exit
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Total pressure profiles: (a) blade inlet; (b) blade exit

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