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TECHNICAL PAPERS

Pressure and Suction Surfaces Redesign for High-Lift Low-Pressure Turbines

[+] Author and Article Information
P. González, I. Ulizar, R. Vázquez

ITP, Industria de Turbo Propulsores, Madrid, Spain

H. P. Hodson

Whittle Laboratory, Cambridge University, Cambridge, U.K.e-mail: hph@eng.cam.ac.uk

J. Turbomach 124(2), 161-166 (Apr 09, 2002) (6 pages) doi:10.1115/1.1452747 History: Received October 16, 2000; Online April 09, 2002
Copyright © 2002 by ASME
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References

Curtis, E. M., Hodson, H. P., Banieghbal, M. R., Howell, R. J., and Harvey, N. W., 1997, “Development of Blade Profiles for Low Pressure Turbine Applications,” ASME J. Turbomach., 119, July.
Howell, R. J., Ramesh, O. N., Hodson, H. P., Harvey, N. W., and Schulte, V., 2000, “High Lift and Aft Loaded Profiles for Low Pressure Turbines,” ASME Paper No 2000-GT-0261, ASME Turbo Expo 2000, Munich, May.
Cobley, K., Coleman, N., Siden, G., and Arndt, N., 1997, “Design of New Three Stage Low Pressure Turbine for the BMW Rolls-Royce BR715 Turbofan Engine,” ASME Paper No. 97-GT-419, Orlando, FL, June.
Denton, J. D. 1999, “State of the Art and Future of Turbine Technology,” Proc. International Gas Turbine Congress, Kobe. pp. 27–37.
Engber, M., and Fottner, L., 1995, “The Effect of Incoming Wakes in Boundary Later Transition of a Highly Loaded Turbine Cascade,” Paper No. 21, AGARD Conference. Loss Mechanisms and Unsteady Flows in Turbomachinery, Derby, May.
Giles,  M., and Drela,  M., 1985, “Two Dimensional Transonic Aerodynamic Design Method,” AIAA J., 25, No 9, pp. 127–134.
Harvey, N. W., Schulte, V., Howell, R. J., and Hodson, H. P., 1999, “The Role of Research in the Aerodynamic Design of an Advanced Low Pressure Turbine,” 3rd European Conf. on Turbomachinery, IMechE, London, Mar.
Howell, R. J., 1999, “Wake-Separation Bubble Interactions in Low Reynolds Number Turbomachinery,” Ph.D. dissertation, Cambridge University, Cambridge, UK.
Schulte, V., and Hodson, H. P., 1998, “Unsteady Wake-Induced Boundary Layer Transition in High Lift LP Turbines,” ASME J. Turbomach., 120, Jan.
Ulizar, I., and González, P., “Aerodynamic Design of a New Five Stage Low Pressure Turbine for the Rolls Royce Trent 500 Turbofan,” accepted for publ., ASME J. Turbomach.
Banieghbal, M. R., Curtis, E. M., Denton, J. D., Hodson, H. P., Huntsman, J., and Schulte, V., 1995, “Wake Passing in LP Turbines,” Paper No. 23, AGARD Conference. Loss Mechanisms and Unsteady Flows in Turbomachinery, Derby, May.
Hatman, A., and Wang, T., 1998, “A Prediction Model for Separated-Flow Transition,” ASME Paper No. 98-GT-237, Stockholm, June.

Figures

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Isentropic surface velocity distributions under unsteady flow conditions (reduced frequency ≈1, ϕ≈0.8) for profile G and profile G2 at Red
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Details of suction surface isentropic velocity distribution for profile G and G2 at a low Reynolds number (≈105)—(a) under steady, and (b) unsteady conditions
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(a) Steady-state measurements: variation of stagnation pressure loss coefficient with Reynolds; (b) profile G2: variation of stagnation pressure loss coefficient with Reynolds and unsteadiness; (c) unsteady measurements: variation of stagnation pressure loss coefficient with Reynolds
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Test section of the low-speed steady-state cascade
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Test section of the low-speed unsteady setup
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Location of the tapping over the surface
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Isentropic surface velocity distributions for profiles F and G at Red
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Profiles F and G: isentropic surface velocity distributions at three Reynolds numbers
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(a) Profiles F and G variation of stagnation profile loss coefficient with Reynolds number; (b) profiles F and G stagnation pressure loss coefficient profile downstream the cascade at Red
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Isentropic surface velocity distributions under steady flow conditions for profiles G and G2 at Red—(a) experimental data, (b) numerical predictions comparison
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Isentropic surface velocity distributions under steady flow conditions for profile G at Red: prediction versus experiments
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Isentropic surface velocity distributions for profile G2 at Red: steady versus unsteady (reduced frequency ≈1, ϕ≈0.8) measurements

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