Effects of Turbulence Structure on the Cavitation of Turbomachinery

第一阶段小企业创新研究奖是对一项技术的分析和实验工作的奖励，该技术可以通过测量单个气泡以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。分析将基于几何光学对球形气泡散射的分析。实验将试图验证分析预测，并通过与高速摄影测量相比较来验证推导出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用于研究涡轮机械中的空化现象以及气液接触装置，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.