Jet-Induced Circulation and Diffusion

Tests have been conducted in an air duct to determine the patterns of mean flow and turbulence produced by a jet emerging along an edge of the duct parallel to one of the duct walls. The parameters that have been varied include the relative proportions of the duct and a nondimensional grouping of the momentum characteristics of the jet. It has been concluded that: (1) Submerged jets provide an alternative (and even more adaptable) means of maintaining the pattern of flow for which a bubble screen is often utilized; (2) the generalized characteristics of the measured mean-flow and turbulence fields are subject to use in design over a considerable range of scales and operational conditions; and (3) until such time as similar studies have been carried out for bubble screens, an approximate method is at hand for comparing their effectiveness in terms of the information for jets presented herein.