Developed single phase turbulent flow through a square-pitch rod cluster

An experimental study of developed single phase turbulent flow through a square pitched array of rod bundles is described. Measurements were made at two spacings (pd = 1.194, 1.107) of the mean velocity distribution and wall shear stress variation, together with the six terms of the symmetrical Reynolds stress tensor. The departure of the turbulent flow structure from axisymmetric pipe flow, particularly in the rod gap region, was found to depend strongly on the (pd) ratio.