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TECHNICAL PAPERS

Mixed Flow Turbines: Inlet and Exit Flow Under Steady and Pulsating Conditions

[+] Author and Article Information
N. Karamanis, R. F. Martinez-Botas, C. C. Su

Department of Mechanical Engineering, Imperial College of Science, Technology and Medicine, London, England

J. Turbomach 123(2), 359-371 (Feb 01, 2000) (13 pages) doi:10.1115/1.1354141 History: Received February 01, 2000
Copyright © 2001 by ASME
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References

Arcoumanis, C., Hakeem, I., Khezzar, L., Martinez-Botas, R. F., and Baines, N. C., 1995, “Performance of a Mixed Flow Turbocharger Turbine Under Pulsating Flow Conditions,” ASME Paper No. 95-GT-210.
Abidat,  M., Chen,  H., Baines,  N. C., and Firth,  M. R., 1992, “Design of a Highly Loaded Mixed Flow Turbine,” Proc. Inst. Mech. Eng., J. Power Energy, 206, pp. 95–107.
Baines, N. C., Wallace, F. J., and Whitfield, A., 1978, “Computer Aided Design of Mixed Flow Turbines for Turbocharger,” ASME Paper No. 78-GT-191.
Chen,  H., Hakeem,  I., and Martinez-Botas,  R. F., 1996, “Modelling of a Turbocharger Turbine Under Pulsating Inlet Conditions,” Proc. Inst. Mech. Eng., Part A: J. Power Energy, 210, pp. 397–408.
Chou, C., and Gibbs, C. A., 1989, “The Design and Testing of a Mixed-Flow Turbine for Turbochargers,” SAE Paper No. 890644.
Wallace, F. J., and Pasha, S. G. A., 1972, “Design, Construction and Testing of a Mixed-Flow Turbine,” The 2nd International JSME Symposium, Fluid Machinery and Fluids, Tokyo.
Arcoumanis,  C., Martinez-Botas,  R. F., Nouri,  J. M., and Su,  C. C., 1997, “Performance and Exit Flow Characteristics of Mixed Flow Turbines,” Int. J. Rotating Mach., 3, No. 4, pp. 277–293.
Benisek, E., 1998, “Experimental and Analytical Investigation of the Flow Field of a Turbocharger Turbine,” IMechE, Paper No. C554/027/98.
Kreuz-Ilhi, T., Filsinger, D., Schulz, A., and Wittig, S., 1999, “Numerical and Experimental Study on the Unsteady Flow Field and Vibration of Radial Inflow Turbines,” ASME Paper No. 99-GT-341.
Baines, N. C., and Yeo, J. H., 1991, “Flow in a Radial Turbine Under Equal and Partial Admission,” IMechE Paper No. C423/002.
Winterbone, D. E., Nikpour, B., and Alexander, G. L., 1990, “Measurement of the Performance of a Radial Inflow Turbine in Conditional Steady and Unsteady Flow,” IMechE Paper No. C405/015.
Karamanis, N., Martinez-Botas, R. F., and Su, C. C., 1999, “Detailed Flow Measurements at the Exit of a Mixed Flow Turbine,” ASME Paper No. 99-GT-342.
Dale, A., and Watson, N., 1986, “Vaneless Radial Turbocharger Turbine Performance,” IMechE Paper C110/86.
Murugan, D. M., Tabakoff, W., and Hamed, A., 1996, “Three-Dimensional Flow Field Measurements Using LDV in the Exit Region of a Radial Inflow Turbine,” Exp. Fluids, 20 .
Kosuge,  H., Yamanaka,  N., Ariga,  I., and Watanabe,  I., 1976, “Performance of Radial Flow Turbines Under Pulsating Flow Conditions,” ASME J. Eng. Power, 98, pp. 53–59.
Dale, A., Watson, N., and Cole, A. C., 1988, “The Development of a Turbocharger Turbine Test Facility,” IMechE, Seminar on Experimental Methods in Engine Research and Development.
Baines, N. C., Hajilouy-Benisi, A., and Yeo, J. H., 1994, “The Pulse Flow Performance and Modelling of Radial Inflow Turbines,” IMechE Paper No. C405/017.
Mollenhauer, K., 1967, “Measurement of Instantaneous Gas Temperatures for Determination of the Exhaust Gas Energy of a Supercharged Diesel Engine,” SAE Paper No. 67929.
Benson, R. S., 1974, “Non-Steady Flow in a Turbocharger Nozzleless Radial Gas Turbine,” SAE Paper No. 740739.
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Hajilouy-Benisi, A., and Baines, N. C., 1992, “Small High Speed Radial Inflow Turbine,” Int. Conf. Eng. Appl. Mech.

Figures

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Instantaneous mass flow rate at the peak ηt-s of 70 percent design speed under pulsating conditions
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Instantaneous static pressure at the peak ηt-s of 70 percent design speed under pulsating conditions
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Instantaneous torque at the peak ηt-s of 70 percent design speed under pulsating conditions
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Instantaneous swallowing capacity at the peak ηt-s of 70 percent design speed at 40 Hz pulsating flow
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Instantaneous total-to-static efficiency vs. velocity ratio of rotor B for 70 percent peak ηt-s at pulsating flow 60 Hz; comparison of the treatment of the unsteady inlet temperature
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Instantaneous actual vs. isentropic work at the peak ηt-s of 70 percent design speed at 40 Hz pulsating flow
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Instantaneous total-to-static efficiency vs. velocity ratio of rotor B at atmospheric expansion and T01=Tinst under pulsating conditions at peak ηt-s of 50 percent design speed (a) 40 Hz, (b) 60 Hz, and 70 percent (c) 40 Hz and (d) 60 Hz
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Pulsating flow characteristics at the inlet of the turbine rotor
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Pulsating flow characteristics at the exit of the turbine rotor
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(a) Schematic and (b) photograph of the mixed flow turbine rotor B
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Velocity measurements (LDV) setup: (a) inlet and (b) exit arrangement
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Steady performance (a) total-static efficiency vs. (b) swallowing capacity of mixed flow rotor B
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Mean velocity (m/s) contours at the inlet of rotor B, 3 mm before blade leading edge (130 deg), for 50 vs. 70 percent design speeds
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Flow angle (degrees) contours at the inlet of rotor B, 3 mm before the blade leading edge (130 deg), for 50 vs. 70 percent design speed
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Axial component of velocity Cm at peak ηt-s for rotor B at (a) 50 percent and (b) 70 percent design speed, 9.5 mm after the blade’s trailing edge
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Tangential component of velocity Cm at peak ηt-s for rotor B at (a) 50 percent and (b) 70 percent design speed, 9.5 mm after the blade’s trailing edge
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Absolute flow angle (degrees) at peak ηt-s for rotor B at (a) 50 percent and (b) 70 percent design speed, 9.5 mm after the blade’s trailing edge
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Deviation angle (degrees) at peak ηt-s for rotor B at (a) 50 percent and (b) 70 percent design speed, 9.5 mm after the blade’s trailing edge

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