Enhancement and Destabilization of Flow Structure by Forced Excitation of Globally - Unstable Flow Systems

通过全局不稳定流动系统的强制激励来增强和破坏流动结构的稳定

• 批准号: 8922095
• 负责人: Donald Rockwell
• 金额: $ 28.13万
• 依托单位: Lehigh University
• 依托单位国家: 美国
• 项目类别: Continuing grant
• 财政年份: 1990
• 资助国家: 美国
• 起止时间: 1990-07-01 至 1995-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8922095&HistoricalAwards=false
• 关键词: Enhancement; Destabilization; Flow; Structure; Forced

An experimental investigation of the basic mechanisms responsible for flow-structure interaction is to be carried out. Flow about single and multiple cylinders will be modified through controlled motion of the cylinders. The first major objective is to determine the basic flow structure and loading responsible for energy transfer both into and out of the cylinders. The second major objective is to optimize the coherence or destruction of large scale vortical flow structures through various modes of excitation. The ability to predict and or prevent excitation of structural oscillations by flows will be enhanced by the results of this study. It also relates to the enhancement of energy transfer into various other engineering systems.

基本机理的实验研究 负责流-结构相互作用的是 出去 单个和多个气缸的流量将 通过气缸的受控运动进行修改。 的 第一个主要目标是确定基本的流动结构 以及负责能量输入和输出的负载 的汽缸。 第二个主要目标是优化 大尺度旋涡流动的相干性或破坏 通过不同的激励模式。 预测和/或防止结构激励的能力 流动引起的振荡将因这种结果而增强。 study. 它还涉及到增强能量转移 其他各种工程系统。