Structure of Turbulent Flow Through a Wall Subchannel of a Rod Bundle with Roughened Rods

摘要

An experimental investigation was undertaken in order to obtain information on the transport properties of turbulent flow through a wall subchannel of a rod bundle with roughened rods and a smooth channel wall. Detailed measurement values were obtained on the distributions of mean flow velocity, intensity of turbulence in all directions and thus the kinetic energy of turbulence as well as the shear stresses perpendicular and parallel to the walls and of the wall shear stresses on the smooth wall. The rod bundle consisted of four parallel rods contained in a rectangular channel; the Reynolds number of this investigation was Re=1.82 x 10 exp 5 . From the measurement values the eddy viscosities in the directions perpendicular and parallel to the walls were calculated. The results are compared with predictions calculated by the VELASCO code. (Atomindex citation 10:449218)