This paper presents a comparison of 2D unsteady Reynolds Averaged Navier-Stokes (RANS) simulations using two standard turbulence models, i.e. RNG k-ε and a Reynolds Stress Transport Model, with experimental data, obtained using two-dimensional Particle Image Velocimetry (PIV) measurements within an entire stage of an axial turbomachine. The computations are performed using the commercial flow solver FLUENT™. A sliding mesh interface between the rotor and stator domains is used. The PIV measurements are performed in a refractive-index-matched facility that provides unobstructed view, and cover the entire 2nd stage of a two-stage axial pump. The inlet velocity and turbulence boundary conditions are provided from the experimental data. Detailed side-by-side comparisons of computed and measured phase-averaged velocity as well as turbulence fields within the entire stage are presented. Quantitative comparisons between the experiments and the computations are also included in terms of line distributions within the rotor-stator gap and the stator wake regions. The results show that, although there is reasonable agreement in general between the experimental results and the computational simulations, some critical flow features are not correctly predicted. The turbulent kinetic energy levels are generally too high in the simulations, with substantial amount of unphysical turbulence generation near the blade leading edges, especially in the case of RNG k-ε model.
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ASME 2005 Fluids Engineering Division Summer Meeting
June 19–23, 2005
Houston, Texas, USA
Conference Sponsors:
- Fluids Engineering Division
ISBN:
0-7918-4198-7
PROCEEDINGS PAPER
A Comparison of Unsteady RANS Simulations With PIV Data in an Axial Turbomachine
Daniel Brzozowski,
Daniel Brzozowski
Johns Hopkins University, Baltimore, MD
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Oguz Uzol,
Oguz Uzol
Johns Hopkins University, Baltimore, MD
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Yi-Chih Chow,
Yi-Chih Chow
Johns Hopkins University, Baltimore, MD
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Joseph Katz,
Joseph Katz
Johns Hopkins University, Baltimore, MD
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Charles Meneveau
Charles Meneveau
Johns Hopkins University, Baltimore, MD
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Daniel Brzozowski
Johns Hopkins University, Baltimore, MD
Oguz Uzol
Johns Hopkins University, Baltimore, MD
Yi-Chih Chow
Johns Hopkins University, Baltimore, MD
Joseph Katz
Johns Hopkins University, Baltimore, MD
Charles Meneveau
Johns Hopkins University, Baltimore, MD
Paper No:
FEDSM2005-77318, pp. 1309-1320; 12 pages
Published Online:
October 13, 2008
Citation
Brzozowski, D, Uzol, O, Chow, Y, Katz, J, & Meneveau, C. "A Comparison of Unsteady RANS Simulations With PIV Data in an Axial Turbomachine." Proceedings of the ASME 2005 Fluids Engineering Division Summer Meeting. Volume 1: Symposia, Parts A and B. Houston, Texas, USA. June 19–23, 2005. pp. 1309-1320. ASME. https://doi.org/10.1115/FEDSM2005-77318
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