Crossflow characteristics of an oscillating jet in a thin slab casting mould

The application of LDA to a transient 1/3 scale (500 mm wide) water model o f a mould typical of steel thin slab casting, is presented. The characteris tics of a crossflow, associated with the oscillating jet emerging from a su bmerged nozzle (internal diameter 33 mm), were analyzed for a range of cast ing rates (0-2 m/min), nozzle submergences (20-120 mm) and nozzle-mould wal l gap widths (0-21 mm). The frequency of oscillation was Sound to be primar ily dependent on the casting rate of the system, independent,lr of nozzle s ubmergence or gap width, whereas the RMS crossflow velocity depended on all three parameters. Additional crossflow was also observed past the jet belo w the nozzle exit and this allowed the jet to oscillate even with zero gap width.