Dynamics of Jet Mixing Layer

射流混合层动力学

• 批准号: 9102863
• 负责人: William George
• 金额: $ 28.3万
• 依托单位: SUNY at Buffalo
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1992
• 资助国家: 美国
• 起止时间: 1992-01-01 至 1994-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9102863&HistoricalAwards=false
• 关键词: Dynamics; Jet; Mixing; Layer

An experiment is to be conducted with a very large number of hotwire probes to diagnose the coherent structure content of a turbulent jet. Simultaneous signals from these probes wiol be utilized to create an experimental reconstruction of the flow by way of the modes inferred from a Proper Orthogonal Decomposition (POD), as well as the dynamical mode interaction. This will be compared to a POD decomposition constructed from existing nonsimultaneous data combined with modeling, to infer the quality of the model used in this latter scheme. The data will also be subjected to various conditional sampling schemes to evaluate the ability of such schemes to capture coherent structures. The research is aimed at evaluating various existing and proposed schemes to experimentally extract the coherent content of turbulent flows. Predictive modeling of such flows is presently handicapped by lack of reliable information on these structures.

一个实验是用大量的 热线探针诊断相干结构的内容， 湍流射流 来自这些探头的同时信号将被 用于创建一个实验性的重建 通过从一个真正交 分解（POD），以及动态模式 互动 这将与POD分解进行比较 从现有的非同步数据中构建， 建模，以推断在此使用的模型的质量 后一个方案。 这些数据也将受到各种 条件抽样方案，以评估这种能力， 捕获相干结构的方案。 该研究旨在评估各种现有的和 提出的方案，以实验方式提取相干 湍流的内容。 此类流动的预测建模 目前由于缺乏可靠的信息， 这些结构。