Fully-Time-Resolved (FTR) Cinema-PIV Imaging of the Physics of Subgrid Turbulence

次网格湍流物理场的全时间分辨 (FTR) Cinema-PIV 成像

• 批准号: 0203140
• 负责人: James Driscoll
• 金额: $ 25.5万
• 依托单位: Regents of the University of Michigan - Ann Arbor
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2002
• 资助国家: 美国
• 起止时间: 2002-05-15 至 2005-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0203140&HistoricalAwards=false
• 关键词: Fully; Time; Resolved; FTR; Cinema

Dr. Driscoll and the Co-PI Dr. Ceccio have developed a time-resolved cinema-PIV(particle image velocity) system that is capable of acquiring 8,000 PIV images/second. In the current proposal, they propose to use this new instrumentation to study the characteristics of a turbulent jet, more specifically, the temporal structure and evolution of eddies and their relationship to the generation of subgrid stresses and dissapation. The experiments will consist of issuing a water jet into a co-flowing stream in a water tunnel. The broader impact of this proposal will be to improve our ability to develop better subgrid scale models for the prediction of the characteristics of turbulent flows, and in the training of graduate students in this advance instrumentation technique. Knowledge gained in this research will be useful in the development of 3D cinema-PIV system.

Driscoll 博士和联合 PI Ceccio 博士开发了一种时间分辨影院 PIV（粒子图像速度）系统，能够每秒采集 8,000 张 PIV 图像。 在当前的提案中，他们建议使用这种新仪器来研究湍流射流的特征，更具体地说，研究涡流的时间结构和演化及其与次网格应力和耗散的产生的关系。 实验将包括将水射流喷射到水隧道中的并流流中。 该提案更广泛的影响将是提高我们开发更好的亚网格尺度模型的能力，以预测湍流的特征，并培训研究生这种先进的仪器技术。 本研究中获得的知识将有助于 3D 影院-PIV 系统的开发。