The near-field structure of free jets from a contoured nozzle, a long pipe and an orifice plate
2005
Wong, C. | Nathan, G. | Mi, J. | Alwahabi, Z. | Dally, B. | Kalt, P. | Nathan, G. | Wong, C. | Australian Conference on Laser Diagnostics in Fluid Mechanics and Combustion (4th : 2005 : McLaren Vale, South Australia)
Azimuthal vorticity fields generated from particle image velocimetry suggest that vortex pairs shed within 2 exit diameters from a contraction nozzle tend towards instantaneous axi-symmetry, while those shed from a sharp-edge orifice plate tend toward an asymmetric near-field structure. Relatively smaller scale and somewhat less organised structures are evident in the flow produced by a long upstream pipe.
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