Turbine vanes experience high convective surface heat transfer as a consequence of the turbulent flow exiting the combustor. Before improvements to vane heat transfer predictions through boundary layer calculations can be made, we need to understand how the turbulent flow in the inviscid region of the passage reacts as it passes between two adjacent turbine vanes. In this study, a scaled-up turbine vane geometry was used in a low-speed wind tunnel simulation. The test section included a central airfoil with two adjacent vanes. To generate the 20 percent turbulence levels at the entrance to the cascade, which simulates levels exiting the combustor, an active grid was used. Three-component laser-Doppler velocimeter measurements of the mean and fluctuating quantities were measured in a plane at the vane midspan. Coincident velocity measurements were made to quantify Reynolds shear stress and correlation coefficients. The energy spectra and length scales were also measured to give a complete set of inlet boundary conditions that can be used for numerical simulations. The results show that the turbulent kinetic energy throughout the inviscid region remained relatively high. The surface heat transfer measurements indicated high augmentation near the leading edge as well as the pressure side of the vane as a result of the elevated turbulence levels. [S0889-504X(00)02302-3]
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April 2000
Technical Papers
Flowfield Measurements for a Highly Turbulent Flow in a Stator Vane Passage
R. W. Radomsky,
R. W. Radomsky
Mechanical Engineering Department, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061
11
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K. A. Thole
K. A. Thole
Mechanical Engineering Department, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061
Search for other works by this author on:
R. W. Radomsky
11
Mechanical Engineering Department, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061
K. A. Thole
Mechanical Engineering Department, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061
Contributed by the International Gas Turbine Institute and presented at the 44th International Gas Turbine and Aeroengine Congress and Exhibition, Indianapolis, Indiana, June 7–10, 1999. Manuscript received by the International Gas Turbine Institute February 1999. Paper No. 99-GT-253. Review Chair: D. C. Wisler.
J. Turbomach. Apr 2000, 122(2): 255-262 (8 pages)
Published Online: February 1, 1999
Article history
Received:
February 1, 1999
Citation
Radomsky, R. W., and Thole, K. A. (February 1, 1999). "Flowfield Measurements for a Highly Turbulent Flow in a Stator Vane Passage ." ASME. J. Turbomach. April 2000; 122(2): 255–262. https://doi.org/10.1115/1.555442
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