The results of an experimental research program determining the blade platform heat-flux level and the influence of blade tip recess on the tip region heat transfer for a full-scale rotating turbine stage at transonic vane exit conditions are described. The turbine used for these measurements was the Allison VBI stage operating in the closed vane position (vane exit Mach number≈1.1). The stage was operated at the design flow function, total to static pressure ratio, and corrected speed. Measurements were obtained at several locations on the platform and in the blade tip region. The tip region consists of the bottom of the recess, the lip region (on both the pressure and suction surface sides of the recess), and the 90 percent span location on the blade suction surface. Measurements were obtained for three vane/blade spacings; 20, 40, and 60 percent of vane axial chord and for a single value of the tip gap (the distance between the top of the lip and the stationary shroud) equal to 0.0012 m (0.046 in) or 2.27 percent of blade height. [S0889-504X(00)00604-8]
Issue Section:
Technical Papers
1.
Metzger
, D. E.
, and Rued
, K.
, 1989
, “The Influence of Turbine Clearance Gap Leakage on Passage Velocity and Heat Transfer Near Blade Tips: Part I—Sink Flow Effects on Blade Pressure Side
,” ASME J. Turbomach.
, 111
, pp. 284
–292
.2.
Metzger
, D. E.
, and Rued
, K.
, 1989
, “The Influence of Turbine Clearance Gap Leakage on Passage Velocity and Heat Transfer Near Blade Tips: Part II—Source Flow Effects on Blade Suction Sides
,” ASME J. Turbomach.
, 111
, pp. 293
–300
.3.
Booth
, T. C.
, Dodge
, P. R.
, and Hepworth
, H. K.
, 1982
, “Rotor-Tip Leakage: Part I—Basic Methodology
,” ASME J. Eng. Power
, 104
, pp. 154
–161
.4.
Wadia
, A. R.
, and Booth
, T. C.
, 1982
, “Rotor Tip Leakage: Part 2—Design Optimization Through Viscous Analysis and Experiment
,” ASME J. Eng. Power
, 104
, pp. 162
–169
.5.
Sjolander
, S. A.
, and Cao
, D.
, 1995
, “Measurement of the Flow in an Idealized Turbine Tip Gap
,” ASME J. Turbomach.
, 117
, pp. 578
–584
.6.
Yaras
, M. I.
, Sjolander
, S. A.
, and Kind
, R. J.
, 1992
, “Effects of Simulated Rotation on Tip Leakage in a Planar Cascade of Turbine Blades
,” ASME J. Turbomach.
, 114
, pp. 652
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.7.
Mayle, R. E., and Metzger, D. E., 1982, “Heat Transfer at the Tip of an Unshrouded Turbine Blade,” Proc. 7th International Heat Transfer Conference, 3, pp. 87–92.
8.
Heyes
, F. J. G.
, and Hodson
, H. P.
, 1993
, “Measurement and Prediction of Tip Clearance Flow in Linear Turbine Cascades
,” ASME J. Turbomach.
, 115
, pp. 376
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.9.
Ameri
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, E.
, and Rigby
, D. L.
, 1998
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11.
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12.
Chyu
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, D. E.
, and Hwan
, C. L.
, 1987
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,” J. of Thermophysics
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, No. 3
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.13.
Chyu
, M. K.
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, and Metzger
, D. E.
, 1989
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,” ASME J. Turbomach.
, 111
, pp. 131
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.14.
Metzger
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, R. S.
, and Chyu
, M. K.
, 1989
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, 111
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.15.
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16.
Ameri
, Ali A.
, and Bunker
, R. S.
, 2000
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,” ASME J. Turbomach.
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.17.
Rigby, D. L., Ameri, A. A., and Steinthorrson, E., 1996, “International Passage Heat Transfer Prediction Using Multiblock Grids and k-W Turbulence Model,” ASME Paper No. 96-GT-188.
18.
Metzger
, D. E.
, Dunn
, M. G.
, and Hah
, C.
, 1991
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,” ASME J. Turbomach.
, 113
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.19.
Ameri, A. A., and Steinthorsson, E., 1995, “Prediction of Unshrouded Rotor Blade Tip Heat Transfer,” ASME Paper No. 95-GT-142.
20.
Ameri, A. A., and Steinthorsson, E., 1996, “Analysis of Gas Turbine Rotor Blade Tip and Shroud Heat Transfer,” ASME Paper No. 96-GT-189.
21.
Dunn
, M. G.
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, J.
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, K. C.
, and Boyle
, R. J.
, 1994
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,” ASME J. Turbomach.
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.22.
Venable
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, Delaney
, R. A.
, Busby
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, Haldeman
, C. W.
, and Abhari
, R. S.
, 1999
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,” ASME J. Turbomach.
, 121
, pp. 663
–672
.23.
Busby
, J. A.
, Davis
, R. L.
, Dorney
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, Dunn
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, B. L.
, and Delaney
, R. A.
, 1999
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,” ASME J. Turbomach.
, 121
, pp. 673
–682
.24.
Dunn
, M. G.
, Haldeman
, C. W.
, Abhari
, R. S.
, and McMillan
, M. L.
, 2000
, “Influence of Vane/Blade Spacing on the Heat Flux for a Transonic Turbine
,” ASME J. Turbomach.
, 122
, this issue, pp. 684
–691
.25.
Kim, J., Ross, R. A., and Dunn, M. G., 1996, “Numerical Investigation of the Heat-Island Effect for Button-Type, Transient, Heat Flux Gage Measurements,” Proc 31st National Heat Transfer Conference, ASME HTD-Vol. 5, pp. 33–39.
26.
Eaton, J. K., Mukerji, D., and Moffat, R. J., 1997, “3-D Convection in 2-D Boundary Layers: First Progress Report,” Proc ASME Heat Transfer Division, ASME HTD-Vol. 353, pp. 187–189.
27.
Mukerji, D., Eaton, J. K., and Moffat, R. J., 1998, “A New Correlation for Temperature Rise Correction of Heat Flux Gages,” Numerical and Experimental Methods in Heat Transfer, ASME HTD-Vol. 361-5, pp. 631–636.
28.
Zilles, D. A., and Abhari, R. S., 1999, “Influence of Non-Isothermal Button Gage Surface Temperature in Heat Flux Measurement Applications,” Proc. IMECE99, Nashville, TN.
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