As highly turbulent flow passes through downstream airfoil passages in a gas turbine engine, it is subjected to a complex geometry designed to accelerate and turn the flow. This acceleration and streamline curvature subject the turbulent flow to high mean flow strains. This paper presents both experimental measurements and computational predictions for highly turbulent flow as it progresses through a passage of a gas turbine stator vane. Three-component velocity fields at the vane midspan were measured for inlet turbulence levels of 0.6%, 10%, and 19.5%. The turbulent kinetic energy increased through the passage by 130% for the 10% inlet turbulence and, because the dissipation rate was higher for the 19.5% inlet turbulence, the turbulent kinetic energy increased by only 31%. With a mean flow acceleration of five through the passage, the exiting local turbulence levels were 3% and 6% for the respective 10% and 19.5% inlet turbulence levels. Computational RANS predictions were compared with the measurements using four different turbulence models including the k-ε, Renormalization Group (RNG) k-ε, realizable k-ε, and Reynolds stress model. The results indicate that the predictions using the Reynolds stress model most closely agreed with the measurements as compared with the other turbulence models with better agreement for the 10% case than the 19.5% case. [S0098-2202(00)00804-X]
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December 2000
Technical Papers
Measurements and Predictions of a Highly Turbulent Flowfield in a Turbine Vane Passage
R. W. Radomsky,
R. W. Radomsky
Mechanical Engineering Department, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061-0238
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K. A. Thole
e-mail: thole@vt.edu
K. A. Thole
Mechanical Engineering Department, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061-0238
Search for other works by this author on:
R. W. Radomsky
Mechanical Engineering Department, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061-0238
K. A. Thole
Mechanical Engineering Department, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061-0238
e-mail: thole@vt.edu
Contributed by the Fluids Engineering Division for publication in the JOURNAL OF FLUIDS ENGINEERING. Manuscript received by the Fluids Engineering Division August 30, 1999; revised manuscript received July 10, 2000. Associate Technical Editor: P. Bearman.
J. Fluids Eng. Dec 2000, 122(4): 666-676 (11 pages)
Published Online: July 10, 2000
Article history
Received:
August 30, 1999
Revised:
July 10, 2000
Citation
Radomsky, R. W., and Thole, K. A. (July 10, 2000). "Measurements and Predictions of a Highly Turbulent Flowfield in a Turbine Vane Passage ." ASME. J. Fluids Eng. December 2000; 122(4): 666–676. https://doi.org/10.1115/1.1313244
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