Enhancement of passive mixing tabs by the addition of secondary tabs

Qualitative and quantitative measurements have been made in the near field of a tabbed jet. Past results have shown that the addition of a passive mixing tab causes rapid large-scale mixing of the core fluid with the surrounding fluid. The tabbed jet concept has been further modified by placing secondary tabs on both sides of the primary tab. The secondary tabs, which are angled away from the core flow, provide an attachment surface for the jet core fluid as it is directed into the ambient region. This modification significantly increases the flux of vorticity into the flow, and the rate at which the jet core and ambient fluid interact. (Author)