CFD Analysis for the Turbulent Flow Distribution in a Fuel Assembly with the Split-Type Mixing Vanes by Using the Advanced Scale-Resolving Turbulence Models

Gong Hee Lee; Ae Ju Cheong

doi:10.4028/www.scientific.net/AMM.752-753.902

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 752-753CFD Analysis for the Turbulent Flow Distribution...

CFD Analysis for the Turbulent Flow Distribution in a Fuel Assembly with the Split-Type Mixing Vanes by Using the Advanced Scale-Resolving Turbulence Models

Abstract:

In general, the turbulent flow inside PWR (Pressurized Water Reactor) fuel assembly depends on the mixing vane configuration and the pattern of the mixing vane arrangement on the strap of the spacer grid. In this study, in order to examine the turbulent flow structure inside fuel assembly with the split-type mixing vanes, simulations were conducted with the commercial CFD (Computational Fluid Dynamics) software, ANSYS CFX R.14. Two different types of turbulence models, i.e. SAS (Scale-Adaptive Simulation)-SST (Shear Stress Transport) and DES (Detached Eddy Simulation), were used. The predicted results were compared with the measured data from the MATiS-H (Measurement and Analysis of Turbulent Mixing in Subchannels-Horizontal) test facility. Although there were locally differences between the prediction and the measurement, ANSYS CFX R.14 predicted the time averaged velocity field in the reliable level. The predicted horizontal and vertical velocity components were more in agreement with the measured data than the axial velocity component. There was no significant difference in the prediction accuracy of both turbulence models.

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Periodical:

Applied Mechanics and Materials (Volumes 752-753)

Pages:

902-907

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.752-753.902

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Online since:

April 2015

Authors:

Gong Hee Lee*, Ae Ju Cheong

Keywords:

Computational Fluid Dynamics, Detached Eddy Simulation, Mixing Vane, Rod Bundle, Scale Adaptive Simulation, Split-Type, Subchannel, Turbulence Model

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References

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