Abstract
The influence of pair of small plates at several locations downstream the nozzle exit on the development of a round jet mixing layer is investigated by means of hotwire measurements and flow visualization. The results show that the plates put at the shear layer are effective to manipulate the jet vortex development. The spectral measurements indicate that the peak amplitude at the roll-up is greatly reduced or even suppressed. While the plates are put at the center of potential core the jet direction is controlled. The results also suggest that a choice of proper size of plates is significant to get an effective control of jets.
