Effects of Turbulence Structure on the Cavitation of Turbomachinery

第一阶段小型企业创新研究奖是对一种技术的分析和实验工作，该技术通过测量单个气泡在不同角度散射的光的相位变化来确定悬浮在液体中的单个气泡的大小和形状。分析将基于球状气泡散射的几何光学。实验将尝试验证分析预测，并通过与高速摄影测量的比较来验证所推导的气泡尺寸和纵横比。一种快速表征气泡大小、形状、速度和浓度的仪器将被用于研究透平机械中的空化以及气液接触设备，如发酵罐和浮选池。

This Phase I Small Business Innovative Research Award is for analytical and experimental work on a technique to determine the size and shape of individual gas bubbles suspended in liquids from the measured variation in phase for light scattered at different angles from a single bubble. The analysis will be based on geometrical optics for scattering from spheroidal bubbles. Experiments will attempt to verify the analytical predictions and to validate the deduced bubble size and aspect ratio by comparison with measurement by high speed photography. An instrument for rapidly characterizing bubble sizes, shapes, velocities, and concentrations would find use in studying cavitation in turbomachinery as well as in gas-liquid contacting devices such as fermentors and flotation ponds.