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

空化引起的流动不稳定性的研究：综合实验/数值方法

• 批准号: 0080323
• 负责人: Roger Arndt
• 金额: $ 5万
• 依托单位: University of Minnesota-Twin Cities
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-08-15 至 2002-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0080323&HistoricalAwards=false
• 关键词: Investigation; Cavitation; Induced; Flow; Instabilities

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.

空化是液压机械中普遍存在的问题。它通常作为泵、涡轮机和螺旋桨/推进器运行的极限条件。加强对其原因的理解，以及它们与举升面几何形状的关系，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好处。PI将使用他实验室中可用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区别声发射特征。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性。