ABSTRACT
This work presents a detailed investigation of the flow characteristics of swirling subsonic annular jets. Swirling jets considered for this study were circular in shape and issuing from a straight annular circular duct which has constant exit and inlet area. Swirl is imposed on the flow by introducing a stationary swirler having ten angular vanes. Three different swirl conditions have been considered, and they are characterized based on the swirler vane angle (0°, 25°, and 50°). Swirl number, pressure, and velocity variation along the centerline, lateral velocity distribution, and mass entrainment were computed for different swirl conditions. From the analysis, it is observed that the increase in swirl angle results in the linear increase of swirl number, length of the recirculation zone, and streamwise mass entrainment rate.
