DOI: 10.1615/TSFP6
FLOW CHARACTERISTICS OF INCLINED ELLIPTIC NOZZLES
SINOPSIS
A flow visualization and digital particle image velocimetry study has been carried out to investigate the resultant flow behaviour of elliptic nozzles with 30° and 60° inclined exits along the major- and minor-planes. Flow images show that regardless of incline-plane, persistently inclined vortex roll-ups are produced for 30° incline case, whereas they undergo rapid turning for the 60° incline case. Axis-switching behaviour is either distorted or suppressed in all inclined nozzles tested. Systematic differences in the vorticity distributions and magnitudes suggest that imposing inclined exits leads to dissimilar vortex-stretching, the extent of which depends on the exact nozzle configuration. Lastly, Reynolds flow stress results indicate that the resultant mixing haracteristics are strongly affected by the inclined nozzle designs.