Analytical prediction of turbulent friction factor for a rod bundle

作者：Bae Jun Ho^*; Park Joo Hwan

来源：Annals of Nuclear Energy, 2011, 38(2-3): 348-357.

DOI：10.1016/j.anucene.2010.10.008

• Friction factor
• Geometry parameter
• Turbulent
• Rod bundle

An analytical calculation has been performed to predict the turbulent friction factor in a rod bundle. For each subchannel constituting a rod bundle, the geometry parameters are analytically derived by integrating the law of the wall over each subchannel with the consideration of a local shear stress distribution. The correlation equations for a local shear stress distribution are supplied from a numerical simulation for each subchannel. The explicit effect of a subchannel shape on the geometry parameter and the friction factor is reported. The friction factor of a corner subchannel converges to a constant value, while the friction factor of a central subchannel steadily increases with a rod distance ratio. The analysis for a rod bundle shows that the friction factor of a rod bundle is largely affected by the characteristics of each subchannel constituting a rod bundle. The present analytic calculations well predict the experimental results from the literature with rod bundles in circular, hexagonal, and square channels.

• 出版日期2011-3