EXPERIMENTAL STUDY ON CONFLUENCE OF TWO TWO-DIMENSIONAL JETS.

Abstract

An experimental study on the confluence of two two-dimensional incompressible turbulent jets, issuing from nozzles with angle theta //0 against the nozzle exit plane, has been presented. The axial momentum and the energy flux of the jets along the z-axis perpendicular to the exit plane are calculated by using the measured values of velocity and presssure distributions. It has been shown that the axial momentum flux along the z-axis decreases owing to the confluence, that the energy flux also decreases remarkably owing to the confluence, and that the decreased values are approximately 40% of the efflux energy of the jet, independent of the ratio of a distance between two nozzles to the nozzle width and theta //0. A method of predicting the velocity distribution also has been proposed. The predicted values agreed well with the experimental results.