CFD Simulation of Swirling Effect in S-Shaped Diffusing Duct by Swirl Angle of 30°

The present study involves the CFD analysis for the prediction of swirl effect on the characteristics of a steady, in compressible flow through an S-shaped diffusing duct. The curved diffuser considered in the present case has S-shaped diffusing duct having an area ratio of 1.9, length of 300 mm and turning angle of 22.5°/22.5°. The static pressure, total pressure, velocity and turbulence intensity were accounted. The improvement is observed for both, clockwise and anti-clockwise swirl, the improvement being higher for clockwise swirl. Flow uniformity at the exit is more uniform for clockwise swirl at the inlet.