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TECHNICAL PAPERS

Experimental Investigation of Unsteady Flow Field Within a Two-Stage Axial Turbomachine Using Particle Image Velocimetry

[+] Author and Article Information
Oguz Uzol, Yi-Chih Chow, Joseph Katz, Charles Meneveau

Department of Mechanical Engineering, Johns Hopkins University, Baltimore, MD 21218

J. Turbomach 124(4), 542-552 (Nov 07, 2002) (11 pages) doi:10.1115/1.1509077 History: Received December 14, 2001; Online November 07, 2002
Copyright © 2002 by ASME
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References

Adamczyk, J. J., 1985, “Model Equation for Simulating Flows in Multistage Turbomachinery,” ASME Paper No. 85-GT-226.
Adamczyk, J. J., Mulac, R. A., and Celestina, M. L., 1986, “A Model for Closing the Inviscid Form of the Average-Passage Equation System,” ASME Paper No. 86-GT-227.
Adamczyk,  J. J., Celestina,  M. L., Beach,  T. A., and Barnett,  M., 1990, “Simulation Of Three Dimensional Viscous Flow Within A Multistage Turbine,” ASME J. Turbomach., 112, p. 370.
Rhie,  C. M., Gleixner,  A. J., Spear,  D. A., Fischberg,  C. J., and Zacharias,  R. M., 1998, “Development and Application Of A Multistage Navier-Stokes Solver—Part I: Multistage Modeling Using Body Forces and Deterministic Stresses,” ASME J. Turbomach., 120, p. 205.
Lejambre,  C. R., Zacharias,  R. M., Biederman,  B. P., Gleixner,  A. J., and Yetka,  C. J., 1998, “Development And Application Of A Multistage Navier-Stokes Solver. Part II: Application To A High Pressure Compressor Design,” ASME J. Turbomach., 120, p. 215.
Busby,  J., Sondak,  D., Staubach,  B., and Davis,  R., 2000, “Deterministic Stress Modeling of a Hot Gas Segregation in a Turbine,” ASME J. Turbomach., 122, p. 62.
Dawes,  W. N., 1992, “Towards Improved Throughflow Capability: The Use of Three-Dimensional Viscous Flow Solvers in A Multistage Environment,” ASME J. Turbomach., 114, pp. 8–17.
Denton,  J. D., 1992, “The Calculation of Three-Dimensional Viscous Flow Through Multistage Turbomachines,” ASME J. Turbomach., 114, pp. 18–26.
Sinha,  M., Katz,  J., and Meneveau,  C., 2000, “Quantitative Visualization of the Flow in a Centrifugal Pump With Diffuser Vanes-II: Addressing Passage-Averaged and Large-Eddy Simulation Modeling Issues in Turbomachinery Flows,” ASME J. Fluids Eng., 122, pp. 108–116.
Van de Wall,  A. G., Kadambi,  J. R., and Adamczyk,  J. J., 2000, “A Transport Model for the Deterministic Stresses Associated With Turbomachinery Blade Row Interactions,” ASME J. Turbomach., 122, pp. 593–603.
Meneveau, C., and Katz, J., 2001, “A Deterministic Stress Model for Rotor-Stator Interactions in Simulations of Passage-Averaged Flow,” submitted to ASME J. Fluids Eng.
Prato,  J., Lakshminarayana,  B., and Suryavamshi,  N., 1997, “Exit Flow Field of an Embedded Stator in a Multi-Stage Compressor,” J. Propul. Power, 13(2), pp. 169–177.
Prato, J., Lakshminarayana, B., and Suryavamshi, N., 1998, “Steady and Unsteady Three-Dimensional Flow Field Downstream of an Embedded Stator in a Multi-Stage Axial Flow Compressor Part I: Unsteady Velocity Field,” ASME Paper No. 98-GT-521.
Suryavamshi, N., Lakshminarayana, B., and Prato, J., 1998, “Steady and Unsteady Three-Dimensional Flow Field Downstream of an Embedded Stator in a Multi-Stage Axial Flow Compressor Part II: Composite Flow Field,” ASME Paper No. 98-GT-522.
Suryavamshi, N., Lakshminarayana, B., and Prato, J., 1998, “Steady and Unsteady Three-Dimensional Flow Field Downstream of an Embedded Stator in a Multi-Stage Axial Flow Compressor—Part III: Deterministic Stress and Heat Flux Distribution and Average-Passage Equation System,” ASME Paper No. 98-GT-523.
Sinha,  M., and Katz,  J., 2000, “Quantitative Visualization of the Flow in a Centrifugal Pump With Diffuser Vanes-I: On Flow Structures and Turbulence,” ASME J. Fluids Eng., 122, pp. 97–107.
Uzol, O., Chow, Y. C., Katz, J., and Meneveau, C., 2001, “Unobstructed PIV Measurements within an Axial Turbo-Pump Using Liquid and Blades with Matched Refracted Indices,” 4th International Symposium on Particle Image Velocimetry, Göttingen, Germany, September 17–19; also, 2002, Experiments in Fluids, Aug.
Chow, Y. C., Uzol, O,. Katz, J., and Meneveau, C., 2002, “An Investigation of Axial Turbomachinery Flows Using PIV in an Optically-Unobstructed Facility,” presented at 9th Int. Symposium on Transport Phenomena and Dynamics of Rotating Machinery, Honolulu, Hawaii, February 10–14.
Chow,  Y. C., Uzol,  O., and Katz,  J., 2002, “Flow Nonuniformities And Turbulent “Hot Spots” Due To Wake-Blade And Wake-Wake Interactions In A Multistage Turbomachine,” ASME J. Turbomach., 124, pp. 553–563.
Roth,  G. I., Mascenik,  D. T., and Katz,  J., 1999, “Measurements of The Flow Structure and Turbulence Within A Ship Bow Wave,” Phys. Fluids, 11(11), pp. 3512–3523.
Roth,  G. I., and Katz,  J., 2001, “Five Techniques for Increasing the Speed and Accuracy of PIV Interrogation,” Meas. Sci. Technol., 12, pp. 238–245.
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Figures

Grahic Jump Location
Test section of the axial turbomachine; the 2nd-stage rotors and stators are made of transparent acrylic
Grahic Jump Location
Phase-averaged velocity in the stator frame of reference (|V̄s|⃗) and turbulent kinetic energy (k) at two rotor phases covering the entire 2nd stage. Utip=8 m/s is the blade tip velocity at 500 rpm, Ls=203 mm is the stage length and x=0 is the rotor leading edge. Arrow shows the rotor direction.
Grahic Jump Location
Matched sets of phase averaged absolute velocity (|V̄s|⃗) and turbulent kinetic energy (k) consisting of, from bottom to top, phase 10 (t/TR=0.9), phase 3 (t/TR=0.2) and phase 6 (t/TR=0.5). Arrow shows the rotor direction.
Grahic Jump Location
(a) Phase-averaged velocity in the rotor frame of reference (|V̄R|⃗); (b) turbulent kinetic energy; (c) phase-averaged flow angle (ᾱR) in the rotor frame of reference around the rotor blade for two different stator phases
Grahic Jump Location
Sample comparisons between measured (t/TR=0.6 and 0.7) and interpolated (t/TR=0.625, 0.650 and 0.675) phase-averaged axial velocity profiles in the rotor wake (x/Ls=0.161)
Grahic Jump Location
(a) Distributions of average passage velocity magnitude (|V⁁s|⃗), deterministic kinetic energy (kdetS) and deterministic shear stress (τ12S det) in the stator frame of reference; (b) distributions of average passage velocity magnitude (|V⁁R|⃗), deterministic kinetic energy (kdetR) and deterministic shear stress (τ12R det) in the rotor frame of reference
Grahic Jump Location
Comparisons between k and kdetS (upper row), and between −uv and τ12S det (lower row) at: (a) x/LS=0.271, (b) x/LS=0.553, and (c) x/LS=0.835. Values at t/TR=0.7 are selected as representatives for the turbulent parameters.
Grahic Jump Location
Comparisons between k and kdetR (upper row), and between −uv and τ12R det (lower row). (a) x/LS=0.172, (b) x/LS=0.212, and (c) x/LS=0.355. Values at t/TR=0.5 that correspond to the same rotor location are selected as representatives for the turbulent parameters.
Grahic Jump Location
Distributions of average passage lateral velocity component. v⁁S/Utip, (a) downstream and (b) upstream of the rotor blade row. The rotor blade occupies the 0.0<x/LS<0.132 region. Flow from right to left.
Grahic Jump Location
Distributions of v⁁S/Utip in sample planes located upstream (x/LS=−0.07) and downstream (x/LS=0.153) of the rotor blade row
Grahic Jump Location
Tangential nonuniformity in the average passage specific work input (W*) at 16 percent rotor axial chord downstream (at x/LS=0.153) of the rotor blade row due to the nonuniform average passage lateral velocity distribution

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