Reattachment Flow Issuing from a Finite Width Nozzle : Report 2, Effects of Initial Turbulence Intensity

Abstract

From the experimental results of a two-dimensional free jet flow, it was found that the flow depends on the initial turbulence intensity at the nozzle exit and this dependency diminishes as turbulence intensity becomes large. The relations between the empirical constants contained in the eddy kinematic viscosity and the initial turbulence intensity were obtained comparing the experimental values of a velocity decay on the jet center line with its approximate calculations. These relations were used for the approximate calculations of a two-dimensional reattachment jet flow. The calculations of the reattachment flow having different turbulence intensities agree well with the experimental results in a wide range of offset ratios, except so small offset ratios.