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LARGE EDDY SIMULATION OF NON-ISOTHERMAL FLOW IN ROTOR/STATOR CAVITY

DOI: 10.1615/ICHMT.2009.HeatTransfGasTurbSyst.380
page 14

Ewa Tuliszka-Sznitko
Poznan University of Technology, Piotrowo 3, 60-965 Poznan, Poland

Artur Zielinski
Institute of Thermal Engineering Poznan, University of Technology, ul. Piotrowo 3, 60-965 Poznan, Poland

Wojciech Majchrowski
Institute of Thermal Engineering, Poznan University of Technology, ul. Piotrowo 3, 60-965 Poznan, Poland

Abstrakt

The Large Eddy Simulation with subgrid modeling based on the spectral Chebyshev-Fourier approximation was performed to investigate the 3D turbulent and transitional nonisothermal flows within the enclosed rotor/stator cavity with the rotating inner and stationary outer cylinder. The stator and the outer cylinder are warmer in comparison with the rotor and the inner cylinder. In LES we used version of Smagorinsky eddy viscosity model, in which the averaging are performed over the fluid particles pathlines instead of averaging over the direction of statistical homogeneity. The flow in the rotating disk system is not only a subject of fundamental interest but also a topic of practical importance with reverence to turbomachinery industry. Computations were performed for the cavity of aspect ratio L=5, different curvature parameters Rm, different Reynolds number from the range (100000-300000) and for thermal Rossby number B=0.1. The main motivation of our study was to investigate influence of the curvature parameters on the heat flux components, the Reynolds stress tensor components and the structural parameters. The results obtained are compared with the experimental data taken from literature.

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