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TECHNICAL PAPERS

Flow Characteristics in Two-Leg Internal Coolant Passages of Gas Turbine Airfoils With Film-Cooling Hole Ejection

[+] Author and Article Information
D. Chanteloup, A. Bölcs

Ecole Polytechnique Fédérale de Lausanne (EPFL), Laboratoire de Thermique appliquée et de Turbomachines (LTT), 1015 Lausanne, Switzerland

J. Turbomach 124(3), 499-507 (Jul 10, 2002) (9 pages) doi:10.1115/1.1480412 History: Received June 01, 2001; Revised March 06, 2002; Online July 10, 2002
Copyright © 2002 by ASME
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References

Rowbury, D., Parneix, S., Chanteloup, D., and Lees, A., 2001, Research into the influence of Rotation on the Internal Cooling Turbine Blades, Proc. AVT Symposium, Heat Transfer and Cooling in Propulsion and Power Systems, Loen, Norway.
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Schabacker, J., 1998, “PIV Investigation of the Flow Characteristics in an Internal Coolant Passages of Gas Turbine Airfoils With Two Ducts Connected by a Sharp 180 deg Bend,” Ph.D. thesis (Ecole Polytechnique fedérale de Lausanne), Vol. no. 1816.
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Shen,  J. R., Wang,  Z., Ireland,  P. T., and Jones,  T. V., 1996, “Heat Transfer Enhancement Within a Turbine Blade Cooling Passage Using Ribs and Combinations of Ribs With Film Cooling Holes,” ASME J. Turbomach., 118, July, pp. 428–434.
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Figures

Grahic Jump Location
The internal coolant passage test facility and turn region details
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Measurement sections. The symbols represent the measurement lines (Y direction) that will be analyzed in the next sections (Figs. 5 and 6).
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Hole velocity profile and remaining bulk massflow along the hole configuration centerline
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Mean streamwise velocity contours and secondary flow vectors obtained at θ=0, 45, 90, 135, and 180 deg in the bend. The contour lines values, Uθ, are plotted on the figures (Uθ/Ub).
Grahic Jump Location
Streamwise velocity contours immediately downstream of the bend, 0.0<X<4.0 at three distances from the bottom wall (U/Ub)
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Centerline velocity profiles differences (baseline-hole), normalized by Ub. {a: Streamwise velocity: U; b: radial velocity (from the web toward the outer walls, i.e. 1:along Z-axis: W; 2: along r-axis: Ur; 3:along Z-axis:-W); c: vertical velocity along Y-axis: V;} (e.g., Fig. 2 for exact locations in the rib modules).

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