Near exit plane effects caused by primary and primary-plus-secondary tabs

Triangular-shaped tabs, attached to the separation lip of a nozzle, have been shown to provide substantial increases in the convective transport-mixing in a jet's near field. Detailed information is reported on the basic features of such tab flows made available by 1) the large-scale tab and 2) the finely resolved pressure/velocity measurements, Secondary tabs Here placed next to, and pointed away from, the primary tab; the motivation was to enhance the outward directed flow from the jet's core region. The strong mixing enhancement, provided by these optimally oriented (pitch angle = 40 deg) secondary tabs, is detailed.