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

空化引起的流动不稳定性的研究：综合数值/实验方法

• 批准号: 0103861
• 负责人: Roger Arndt
• 金额: $ 30万
• 依托单位: University of Minnesota-Twin Cities
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-08-01 至 2005-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0103861&HistoricalAwards=false
• 关键词: Investigation; Cavitation; Induced; Flow; Instabilities

The PI proposes to carry out experimental and numerical investigations of flow instabilities induced by cavitation as often found in hydraulic machinery, and in flows around hydrofoils and propellers. Attention will be paid in the following four ares: (1) the formation of cloud cavitation and its effect on the wake structure of hydrofoils, (2) detailed study of erosion mechanisms caused by the collapse of such cavities, (3) comparative study of the acoustics of cloud and bubble cavitation, and (4) analysis of the periodic oscillations of the reentrant jet and their scaling. Experiments and numerical simulations will be carried out in an interactive manner to enhance the progress in both endeavors.

PI建议对水力机械中经常发现的空化引起的流动不稳定性以及水翼和螺旋桨周围的流动进行实验和数值研究。 本文的主要内容包括：（1）云空化的形成及其对翼型尾流结构的影响;（2）云空化溃灭引起的腐蚀机理的详细研究;（3）云空化与泡空化声学特性的比较研究;（4）再入射流周期振荡及其尺度分析。 实验和数值模拟将以互动的方式进行，以促进这两项工作的进展。