Mean-velocity distributions of contra-swirling coaxial,confined jets

Conclusions From the study, it is observed that introduction of swirl in the central jet enhances the merger whereas higher swirl in the annulus enhances both mixing and flow development. On qualitative comparison with similar works (Gouldin et al. 1985; Ramos and Sommer 1983) it is seen that imposition of pressure gradient in form of expanded confinement enhances the capability of formation of central recirculation core. Wall static pressure distribution also gives an indication of the wall recirculation size.