The effect of vortex generators, in the form of small tabs projecting into
the flow at the nozzle exit, aided by secondary tabs on either side, on the
mixing characteristics of an axisymmetric jet at Mach number 1.7 is invest
igated. Experimental studies on the basic features of the jet from a nozzle
with secondary tabs are conducted to assess the free jet characteristics a
s well as the momentum and thermal mixing behavior. The secondary tabs were
found to increase the jet spread and distort the jet cross-section and wer
e found to cause substantial enhancement of mixing of supersonic jets. jet
structure is observed using flow-visualization techniques. LLS images are e
mployed to obtain cross-sectional views of the jet with the introduction of
secondary tabs. The ability of secondary tabs to eliminate the screech noi
se of the supersonic jet is also observed.