Heat Extraction and Droplet Impact Regimes Obtained With Continuous Casting Air-Mist Nozzles
(Room 205A)
09 May 17
11:00 AM
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11:30 AM
Tracks:
Caster Process Optimization
This work presents experimental results about the heat extraction and drop-impact regimes taking place when a local portion of a horizontal flat-fan air-mist jet impinges a metallic disk maintained at temperatures of interest to continuous casting. The mists were generated with a nozzle operating under conditions of practical interest, and the disk was placed at center and off-center positions located along the major axis of the mist footprint. These conditions allow for a wide spectrum of mist characteristics. It was found that the heat flux extracted can be well correlated in terms of average properties of free non-impinging mists. Visualization of mist-wall interaction using a high-speed camera allows for a diagram to be created of the droplet impact regimes that influence intensity, efficiency and uniformity of the cooling process.