Diffusion of a jet injected perpendicularly into uniform cross flow. 3rd report, Influence of swirl intensity on diffusion of a jet.

Abstract

Velocity vectors and concentration profiles of a swirling jet have been measured by flow visualization and its image processing. At visualization a water flow model is used and a single jet is injected to simulate diffusion of a burner or an airport jet in large utility boiler furnaces. The conclusions show that (1) because of a increase of swirl intensity, a jet spreads widely near the throat and decreases its penetration depth into uniform flow, and that (2) the uniform flow is accelerated where the direction of the uniform flow velocity vector coincides with the direction of the swirling jet rotating velocity component.