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TECHNICAL PAPERS: Gas Turbines: Heat Transfer

Performance of Pre-Swirl Rotating-Disc Systems

[+] Author and Article Information
Hasan Karabay, Robert Pilbrow, Michael Wilson, J. Michael Owen

Department of Mechanical Engineering, Faculty of Engineering and Design, University of Bath, Bath BA2 7AY, UK

J. Eng. Gas Turbines Power 122(3), 442-450 (Jan 03, 2000) (9 pages) doi:10.1115/1.1285838 History: Received March 09, 1999; Revised January 03, 2000
Copyright © 2000 by ASME
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References

Meierhofer, B., and Franklin, C. J., 1981, “An Investigation of a Pre-swirled Cooling Airflow to a Gas Turbine Disk by Measuring the Air Temperature in the Rotating Channels,” ASME Paper 81-GT-132.
El-Oun,  Z., and Owen,  J. M., 1989, “Pre-Swirl Blade-Cooling Effectiveness in an Adiabatic Rotor-Stator System,” ASME J. Turbomach., 111, pp. 522–529.
Chen, J., Owen, J. M., and Wilson, M., 1993, “Parallel-Computing Techniques Applied to Rotor-Stator Systems: Fluid Dynamics Computations” in Numerical Methods in Laminar and Turbulent Flow, 8 , Pineridge Press, Swansea, pp. 899–911.
Chen, J., Owen, J. M., and Wilson, M., 1993, Parallel-Computing Techniques Applied to Rotor-Stator Systems: Thermal Computations, in Numerical Methods in Thermal Problems, 8 , Pineridge Press, Swansea, pp. 1212–1226.
Popp, O., Zimmermann, H., and Kutz, J., 1996, “CFD Analysis of Cover-Plate Receiver Flow,” ASME Paper 96-GT-357.
Wilson,  M., Pilbrow,  R., and Owen,  J. M., 1997, “Flow and Heat Transfer in a Pre-Swirl Rotor-Stator System,” ASME J. Turbomach., 119, pp. 364–373.
Karabay,  H., Chen,  J. X., Pilbrow,  R., Wilson,  M., and Owen,  J. M., 1999, “Flow in a Cover-Plate Pre-Swirl Rotor-Stator System,” ASME J. Turbomach., 121, pp. 160–166.
Pilbrow,  R., Karabay,  H., Wilson,  M., and Owen,  J. M., 1999, “Heat Transfer in a ‘Cover-Plate’ Pre-Swirl Rotating-Disc System,” ASME J. Turbomach., 121, pp. 249–256.
Owen, J. M., and Rogers, R. H., 1989, Flow and Heat Transfer in Rotating Disc Systems: Vol. 1, Rotor-Stator Systems, Research Studies Press, Taunton, UK (John Wiley, New York).
Owen, J. M., and Rogers, R. H., 1995, Flow and Heat Transfer in Rotating Disc Systems: Vol. 2, Rotating Cavities, Research Studies Press, Taunton, UK (John Wiley, New York).
Karabay, H., Wilson, M., and Owen, J. M., 1999, “Predicting Effects of Swirl on Flow and Heat Transfer in a Rotating Cavity,” submitted to Int. J. Heat Fluid Flow.
Karabay, H., 1998, “Flow and Heat Transfer in a Cover-Plate Pre-Swirl Rotating-Disc System,” Ph.D. thesis, University of Bath, UK.
Launder, B. E., and Sharma, B. I., 1974, “Application of the Energy Dissipation Model of Turbulence to the Calculation of the Flow Near a Spinning Disc,” Letters in Heat and Mass Transfer, pp. 131–138.
Morse,  A. P., 1988, “Numerical Prediction of Turbulent Flow in Rotating Cavities,” ASME J. Turbomach., 110, pp. 202–215.
Chen,  J., Gan,  X., and Owen,  J. M., 1996, “Heat Transfer in An Air-Cooled Rotor-Stator System,” ASME J. Turbomach., 118, pp. 444–451.

Figures

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Simplified diagram of cover-plate pre-swirl system (for the rig used in this study: a=80 mm,b=207 mm,r1=90 mm,r2=200 mm,S=25 mm,s=10 mm)
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Grid distributions used for computations: (a) whole system; (b) simple cavity.
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Diagram of the rotating-disc rig
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Details of total-temperature probe located in blade-cooling hole (not to scale)
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Comparison between computed and measured variation of Vϕ/Ωr with x−2 for λT=0.22 and Reϕ=0.55×106: (a) βp=2.511; (b) βp=4.535.
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Variation of βp,eff with βp for whole system
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Radial distribution of computed and theoretical pressure coefficients for whole system: (a) Reϕ=1.3×106T=0.23; (b) Reϕ=0.56×106T=0.35; and (c) Reϕ=1.3×106T=0.35.
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Computed variation of nondimensional pressure loss βp for whole system
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Computed variation of moment coefficient with βp for whole system (□ Reϕ=0.56×106T=0.35; ○ Reϕ=1.33×106T=0.23).
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Computed variation of Nuav with βp for whole system: (a) Reϕ=1.33×106T=0.23; (b) Reϕ=1.37×106T=0.35.
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Comparison between computed and measured radial variation of Nu with x: (a) Reϕ=0.535×106T=0.173,βp=1.110, (b) Reϕ=0.542×106T=0.176,βp=1.537, (c) Reϕ=0.898×106T=0.351,βp=2.049, (d) Reϕ=0.965×106T=0.349,βp=2.866, (e) Reϕ=0.588×106T=0.353,βp=3.059.

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