Investigation of Cavitation-Induced Flow Instabilities: An Integrated Experimental/Numerical Approach

明尼苏达大学的罗杰·阿恩特，空化是水力机械中普遍存在的问题。它通常是泵、涡轮机和螺旋桨/推进器运行的限制条件。进一步了解空化的原因及其与升力面几何形状的关系，以及如何最大限度地减少空化的不利影响，将对水利工程的这些方面大有裨益。PI将利用他实验室提供的先进实验技术来解决这些问题。他将使用协调和有条件采样的摄影来识别云和气泡空化制度的不同声发射特征。使用指定的水翼的进一步实验将涉及识别尾迹内的周期性运动和相关的气泡特征。

AbstractCTS-0080323Roger Arndt, University of MinnesotaCavitation is a ubiquitous problem in hydraulic machinary. It often serves as the limiting condition for the operation of pumps, turbines, and propellars/propulsors. An enhanced understanding of the causes, their relationship to the lifting surface geometrics, and how to minimize the adverse effects of cavitation would be of great benefit to these aspects of hydraulic engineering.The PI will address these issues using the advanced experimental techniques which are available in his laboratory. He will identify the distinction acoustic emission features of the cloud and the bubble cavitation regimes using coordinated and conditionally-sampled-photography. Further experiments using the designated hydrofoil will involve identification of the periodic motions within the wake and the associated bubble characteristics.