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Study of Operating Characteristics of a Rotating Bowl for Production of Microspheres

机译：微球生产转杯运行特性研究

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A study was made of the operating characteristics of a rotating bowl for the production of uniform microspheres. The system was investigated using first water, and later a modeling fluid which approximated the properties of a nitrate-stabilized urania sol. Previously reported data on similar bowl systems indicated very good uniformity of droplet diameters within a plume projected from the bowl, but the results of this study did not confirm such performance, at least in the case of water. It was found that droplet diameter varied about 50% of the mean in the total spray and about 20% of the mean in the plume for the water tests. The modeling fluid was found to give better uniformity of droplet size across the plume, the average diameter variation from the plume mean being around 11% or less. Droplet size was found to depend directly on the flow rate, inversely on the angular velocity and bowl diameter. The droplet size data were successfully correlated by dimensional analysis. It was found that from 70 to 90% of the collected spray was within a band of fairly uniform drop size. However, an overall mass balance accounted for 70% or less of the feed. These results indicate that if the device is used for the production of microspheres, that some recycling of fluid will be necessary. (ERA citation 09:042930)

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